Brita Stedje

• Kitur, Abigael Jepkosgei; Stedje, Brita; Wabuyele, Emily & Løken, Solveig Bua (2025). Exploring the phylogenomics of Dipcadi (Asparagaceae, Scilloideae) and assessing the utility of ITS as a DNA barcode. Plant Systematics and Evolution. ISSN 0378-2697. 311(3). doi: 10.1007/s00606-025-01947-0. Fulltekst i vitenarkiv Vis sammendrag

  Dipcadi (Asparagaceae, Scilloideae) has long presented phylogenetic and taxonomic challenges. A recent study by Chapano et al. (in press) based on ITS sequence data found several non-monophyletic species and an unresolved backbone topology of the genus. In this study, we present the first high-throughput sequencing (HTS) phylogeny of Dipcadi, using data from target capture of the angiosperms353 loci. The sampling is focused on African diversity. Additionally, we provide an updated ITS phylogeny representing 15 Dipcadi species, including 18 newly sequenced accessions. We expand taxon sampling, especially of D. longifolium, to further explore phylogenetic relationships and species limits in the genus. Although the angiosperms353 loci did not fully resolve the backbone topology of Dipcadi, both approaches generated similar topologies with six well-supported clades, but with incongruences regarding deep nodes. We corroborate monophyly of D. marlothii and D. glaucum. Dipcadi longifolium represents a species complex, possibly including D. gracillimum, but we refrain from taxonomic revisions based on the current sampling. Dipcadi viride and possibly D. platyphyllum are paraphyletic, warranting further attention. Our findings confirm that ITS can be effectively employed as a barcode marker in Dipcadi.

• Kawuma, Carol; Stedje, Brita; Katuura, Esther; Ipulet, Perpetua; Mulumba, John Wasswa & Kakudidi, Esezah [Vis alle 9 forfattere av denne artikkelen] (2025). Diversity, Distribution and Habitat Suitability Assessment of Solanum Species of the Leptostemonum Clade in Uganda. African Journal of Ecology. ISSN 0141-6707. 63(2). doi: 10.1111/aje.70021. Fulltekst i vitenarkiv
• Kawuma, Carol; Namaganda, Mary; Katuura, Esther; Ipulet, Perpetua; Mulumba, John Wasswa & Kakudidi, Esezah [Vis alle 9 forfattere av denne artikkelen] (2024). Morphological variation within Solanum campylacanthum (Solanaceae) in Uganda and its relationship with S. cerasiferum. Phytotaxa. ISSN 1179-3155. 661(1), s. 63–74. doi: 10.11646/phytotaxa.661.1.4. Fulltekst i vitenarkiv
• Nkosi, Noluthando Nonjabulo; Zharare, Godfrey Elijah; Zimudzi, Clemence; Stedje, Brita & Ntuli, Nontuthuko Rosemary (2024). Variation in Phenology and Morphological Traits of Seed-Propagated Laggera alata and Laggera crispata Forms. Diversity. 16(8). doi: 10.3390/d16080466. Fulltekst i vitenarkiv Vis sammendrag

  The phenological and morphological variation studies among forms of Laggera Sch. Bip. Ex. Benth. and Hook species are limited, despite the medicinal use of the genus. Therefore, this study aimed to document phenology and morphological variation in cultivated populations of Laggera alata and Laggera crispata forms from seedling to maturity. The forms were categorized as Laggera alata with a small capitulum (LA-SC), Laggera alata with a large capitulum (LA-BC), Laggera crispata from South Africa (LC-SA), and Laggera crispata from Zimbabwe (LC-ZIM). Seeds were germinated in Petri dishes, transplanted to plug trays, and later to field plots at 60 days. Phenological events were recorded when observed in at least one plant. Twelve qualitative and four morphometric traits were measured monthly on five plants per Laggera form. Analysis of variance and Tukey’s Honestly Significant Difference test (p < 0.05) were used for data analysis. Results indicated significant variation in phenology, qualitative traits, leaf traits, plant height, and stem diameter both within and between L. crispata and L. alata forms. Morphometric traits, such as leaf size and the number of leaves per plant, were identified as key descriptors for differentiating L. alata forms. These findings provide a foundation for the introduction of Laggera forms into farming systems for medicinal and commercial purposes.

• Stedje, Brita (2023). Page 64. I Brita, Stedje (Red.), Flora Zambesiaca, Vol. 13(3). Kew Publishing. ISSN 9781842467305. Fulltekst i vitenarkiv
• Stedje, Brita; Rulkens, Antonius J.H. & Hankey, Andrew J. (2022). Occultia (Scilloideae, Asparagaceae), a new genus from Malawi and Mozambique. Phytotaxa. ISSN 1179-3155. 575(2), s. 166–172. doi: 10.11646/phytotaxa.575.2.6. Fulltekst i vitenarkiv Vis sammendrag

  A new genus Occultia (Scilloideae, Asparagaceaae), is described from Malawi and Mozambique. One of the species on which this genus is based, was originally described as Hyacinthus. The genus is clearly separated from Ledebouria and closely related genera in characters of the flowers and the fruits. In Occultia tepals are united for 1/3 to ½ their length, the filaments are very short and inserted at the top of the perianth tube. In the fruiting stage, the tepals of the new genus become membranous and detached from their basis, but may form a cap on the developing capsule. In Ledebouria the tepals are free or united just at the base, the filaments are of a certain length and inserted at the base of the tepals. If persisting at fruiting stage the tepals are attached to the base of the capsule, and may become fleshy with time. The new genus comprises two species O. hyacinthoides and O. fragrans.

• Yifru, Mistire; Stedje, Brita; Wondimu, Tigist; Bekele, Tamrat & Demissew, Sebsebe (2022). Molecular Phylogeny of Ethiopian Artemisia (Asteraceae) Species Based on Nuclear External Transcribed Spacer (ETS) and Internal Transcribed Spacer (ITS). Phytotaxa. ISSN 1179-3155. 548(1), s. 51–62. doi: 10.11646/phytotaxa.548.1.4. Fulltekst i vitenarkiv
• Struck, Torsten H; Feder, Jeffrey L.; Bendiksby, Mika; Birkeland, Siri; Oliveira, Josè Cerca De & Gusarov, Vladimir [Vis alle 13 forfattere av denne artikkelen] (2017). Finding Evolutionary Processes Hidden in Cryptic Species. Trends in Ecology & Evolution. ISSN 0169-5347. 33(3), s. 153–163. doi: 10.1016/j.tree.2017.11.007. Fulltekst i vitenarkiv Vis sammendrag

  Cryptic species could represent a substantial fraction of biodiversity. However, inconsistent definitions and taxonomic treatment of cryptic species prevent informed estimates of their contribution to biodiversity and impede our understanding of their evolutionary and ecological significance. We propose a conceptual framework that recognizes cryptic species based on their low levels of phenotypic (morphological) disparity relative to their degree of genetic differentiation and divergence times as compared to non-cryptic species. We discuss how application of a more rigorous definition of cryptic species in taxonomic practice will lead to more accurate estimates of their prevalence in nature, better understanding of their distribution patterns on the tree of life, and increased abilities to resolve the processes underlying their evolution.

• Musara, Collen; Spies, Paula; Spies,, Johan J. & Stedje, Brita (2017). A review of Bulbinella (Asphodelaceca): Distribution, conservation status, and economic importance. Botanical Sciences. ISSN 2007-4298. 95(2), s. 155–168. doi: 10.17129/botsci.696. Fulltekst i vitenarkiv
• Olet, Eunice Apio; Lye, Kåre & Stedje, Brita (2015). Crossing relationships and chromosome numbers of Solanum section Solanum in Uganda. Nordic Journal of Botany (NJB). ISSN 0107-055X. 33(4), s. 472–483. doi: 10.1111/njb.00592. Fulltekst i vitenarkiv
• Nyenya, Ratidzay Takawira; Newton, Leonard E.; Wabuyele, Emily & Stedje, Brita (2014). Ethnobotanical uses of Sansevieria Thunb. (Asparagaceae) in coast province of Kenya. Ethnobotany Research and Applications. 12(1), s. 51–69. Fulltekst i vitenarkiv
• Mwase, Weston; Akinnifesi, F. K.; Stedje, Brita; Kwapata, M.B. & Bjørnstad, Åsmund (2010). Genetic diversity within and among southern African provenances of Uapaca kirkiana Muell. Arg using morphological and AFLP markers. New forests. ISSN 0169-4286. 40(3), s. 383–399. doi: 10.1007/s11056-010-9206-z. Fulltekst i vitenarkiv
• Ntupanyama, YM; Mwase, WF; Stedje, Brita; Kwapata, MB; Bokosi, JM & Hvoslef-Eide, AK (2008). Indigenous knowledge of rural communities in Malawi on socio-economic use, propagation, biology, biodiversity and ecology of Uapaca kirkiana Muell. Arg. African Journal of Biotechnology. 7, s. 2386–2396. Fulltekst i vitenarkiv
• Ntupanyama, Yanira; Mwase, Weston; Stedje, Brita; Kwapata, M.B.; Bokosi, J.M. & Hvoslef-Eide, Anne Kathrine (2008). Indigenous knowledge of rural communities in Malawi on socio-economic use, propagation, biology, biodiversity and ecology of Uapaca kirkiana Muell. Arg. African Journal of Biotechnology. 7(14), s. 2386–2396. Fulltekst i vitenarkiv Vis sammendrag

  Uapaca kirkiana Muell Arg. is one of the most popular indigenous fruit trees in the Miombo woodlands of southern Africa. An investigation into existing indigenous knowledge and socio- economic use of this fruit tree was conducted in Malawi. The survey revealed that U. kirkiana fruits contribute considerably to livelihood as a food supplement and for income generation among local communities. However, U. kirkiana trees are not widely cultivated due to lack of improved planting materials and difficulties in establishment outside their natural habitats. The results from the survey indicate that fruits are the main non-timber products that contribute to demand for domestication and the attributes preferred by the rural communities for improvement are mainly related to fruit taste and yield. Poor management and anthropogenic activities have resulted in the destruction of forest reserves and the local people do not have maximum stewardship of U. kirkiana trees in the forest reserve. The indigenous knowledge on U. kirkiana trees provides a valuable basis for domestication, propagation and improvement of fruit and tree attributes, and management issues on both co-managed and government forest reserve.

• Mwase, WF; Erik-Lid, S; Bjornstad, A; Stedje, Brita; Kwapata, MB & Bokosi, JM (2007). Application of amplified fragment length polymorphism (AFLPs) for detection of sex-specific markers in dioecious Uapaca kirkiana Muell. angstrom rg. African Journal of Biotechnology. 6. Fulltekst i vitenarkiv
• Kwembeya, Ezekeil Gwinyai; Bjorå, Charlotte Sletten; Stedje, Brita & Nordal, Inger (2007). Phylogenetic relationships in the genus Crinum (Amaryllidaceae) with emphasis on tropical African species: evidence from trnL-F and nuclear ITS DNA sequence data. Taxon. ISSN 0040-0262. 56, s. 801–810. Fulltekst i vitenarkiv
• Mwase, WF; Bjornstad, A; Bokosi, JM; Kwapata, MB & Stedje, Brita (2007). The role of land tenure in conservation of tree and shrub species diversity in miombo woodlands of southern Malawi. New forests. ISSN 0169-4286. 33. doi: 10.1007/s11056-006-9029-0. Fulltekst i vitenarkiv
• Mwase, Weston; Lid, Stein Erik; Bjørnstad, Åsmund; Stedje, Brita; Kwapata, M.B. & Bokosi, J.M. (2007). Application of amplified fragment length polymorphism (AFLPs) for detection of sex-specific markers in dioecious Uapaca kirkiana Muell. angstrom rg. African Journal of Biotechnology. 6(2). Fulltekst i vitenarkiv Vis sammendrag

  Uapaca kirkiana Muell. angstrom rg is a dioecious fruit tree species for priority domestication in Southern Africa. It reaches reproductive maturity in eight to ten years with male plants making up 50% of breeding populations. Early identification of sex of seedlings is a prerequisite for selection and tree improvement. The amplified fragment length polymorphism (AFLP) technique was used to amplify DNA segments of U. kirkiana male and female plants to identify sex-specific markers. A total of 84 selective primer combinations were screened using bulked segregant analysis (BSA) for males and females. More than 110 polymorphic markers were obtained but each of the four primer pairs (E-ACT/M-CTG, E-ACA/M-CAA, E41+A/M-CTA and E-AGG/M-CTC) showed one band that was linked to sex. When the four primer pairs were tested in ten individuals from different populations only one primer pair (E-ACT/MCTG) amplified a 320 bp band in female plants only. It is possible that this marker is linked to a sex-determining locus. The results suggest that the gene that determines sex of U. kirkiana is autosomal in nature and this marker may be important during fruit domestication and tree improvement programmes. The marker has been sequenced and sequence characterised amplified region ( SCAR) marker will be developed and used for precise and rapid identification of female plants.

• Mwase, Weston; Bjørnstad, Åsmund; Bokosi, J.M.; Kwapata, M.B. & Stedje, Brita (2007). The role of land tenure in conservation of tree and shrub species diversity in miombo woodlands of southern Malawi. New forests. ISSN 0169-4286. 33. Fulltekst i vitenarkiv Vis sammendrag

  Biodiversity is declining throughout southern African miombo woodlands due to poor land use practices that are detrimental to soil, vegetation and habitat. We aimed at examining tree and shrub species diversity and distribution in Uapaca kirkiana-dominated woodlands under three land tenure types; forest reserves, customary and leasehold land. The study was conducted at different forest sites within similar agroecological zone in southern Malawi. Study sites were located at a range of altitudes between 900 and 1,200 m a.s.l. Three circular plots each with 32.60 m radius were established at each study site to sample tree and shrub species composition, structure and distribution under three land tenure types. We found that forest reserves had higher species diversity with an average of 16 tree families, 27 genera and 34 species as compared to only 10 tree families, 6 genera and 6 species on customary forest lands. Comparisons of diameter at breast height size class distributions showed that customary land had significantly low numbers of small (5.0-10.0 cm) and very large (30 cm) diameter classes suggesting lower levels of regeneration and high rate of anthropogenic activities. The high species diversity and richness in forest reserves and leasehold land indicate high potential for protected lands to restore tree species diversity. It is concluded that levels of human activities as influenced by land tenure type reduce tree species diversity, composition and distribution at the different sites, and this confirms the hypothesis that open access lands are not compatible with conservation of tree and shrub species diversity because of high anthropogenic activities.

• Olet, Eunice Apio; Ziraba, Remiguis B. & Stedje, Brita (2007). Solanum aethiopicum L. and S. anguivi lam. in Uganda: Utilization aspects. I Ochatt, Sergio & Jain, Mohan (Red.), Breeding of Neglected and Under-Utilized Crops, Spices and Herbs. Science Publishers Inc.. ISSN 9781578085095. s. 203–213. Fulltekst i vitenarkiv
• Mwase, Weston; Bjørnstad, Åsmund; Stedje, Brita; Bokosi, J.M. & Kwapata, M.B. (2006). Genetic diversity of Uapaca kirkiana Muel. Arg. populations as revealed by amplified fragment length polymorphisms (AFLPs). African Journal of Biotechnology. 5(13). Fulltekst i vitenarkiv Vis sammendrag

  Uapaca kirkiana is a priority fruit tree species for domestication in miombo woodlands of Southern Africa. Natural populations of U. kirkiana are declining through out the woodlands due to deforestation, forest fragmentation and wildfires. Knowledge of population structure and genetic diversity is prerequisite for development of conservation strategies. Amplified fragment length polymorphisms (AFLP) were used to assess the genetic diversity of eight populations from three geographical regions of Malawi. AFLP markers revealed moderate differentiation (GST = 0.079) among the populations collected from the three regions, however, there were no significant genetic variations among the regional collections. Analyses of molecular variance (AMOVA) found very high variation (92%) among individuals within populations and 6.8% among populations. The variations between populations indicate that populations can not be considered a single panmictic unit. Analyses of genetic similarity based on unweighted pair group method of arithmetic averages (UPGMA) suggested that the 8 populations fall into three clusters with 5 populations in one cluster, two in another and the lake shore population of Chesamu in its own cluster. Based on results presented it would be cost effective to sample a small number of populations represented by a large number of individuals for germplasm conservation purposes. In view of the wide distribution of U. kirkiana in the miombo woodlands in Southern Africa there is need for a more intensive genetic study to include populations growing in different countries to produce a wider picture of levels of distribution of genetic diversity of the species.

• Mwase, WF; Bjornstad, A; Stedje, Brita; Bokosi, JM & Kwapata, MB (2006). Genetic diversity of Uapaca kirkiana Muel. Arg. populations as revealed by amplified fragment length polymorphisms (AFLPs). African Journal of Biotechnology. 5. Fulltekst i vitenarkiv
• Lebatha, P; Buys, MH & Stedje, Brita (2006). Ledebouria, Resnova and Drimiopsis: a tale of three genera. Taxon. ISSN 0040-0262. 55, s. 643–652. Fulltekst i vitenarkiv
• Jørgensen, Marte Holten; Elven, Reidar; Tribsch, Andreas; Gabrielsen, Tove M; Stedje, Brita & Brochmann, Christian (2006). Taxonomy and Evolutionary Relationships in the Saxifraga rivularis Complex. Systematic Botany. ISSN 0363-6445. 31(4), s. 702–729. Fulltekst i vitenarkiv
• Semagn, Kassa; Stedje, Brita & Bjørnstad, Åsmund (2004). Patterns of phenotypic variation in endod (Phytolacca dodecandra) from Ethiopia. Arfican Journal of Biotechnology. 3, s. 32–39. Fulltekst i vitenarkiv
• Semagn, Kassa; Stedje, Brita & Bjørnstad, Åsmund (2004). Patterns of phenotypic variation in endod (Phytolacca dodecandra) from Ethiopia. African Journal of Biotechnology. 3(1), s. 32–39. Fulltekst i vitenarkiv
• Stedje, Brita (2003). Analysis of genetic diversity and differentiation in Ethiopian populations of Phytolacca dodecandra as revealed by AFLP and RAPD analyses. Genetic Resources and Crop Evolution. ISSN 0925-9864. 50(6), s. 649–661. Fulltekst i vitenarkiv
• Stedje, Brita (2003). RAPD variation in Solanum anguivi and S. aethiopicum (Solanaceae) in Uganda. Euphytica. ISSN 0014-2336. 131, s. 293–297. Fulltekst i vitenarkiv
• Kassa, Semagn; Bjørnstad, Åsmund & Stedje, Brita (2003). Genetic diversity and differentiation in Ethiopian populations of Phytolacca dodecandra as revealed by AFLP and RAPD analyses. Genetic Resources and Crop Evolution. ISSN 0925-9864. 50(6), s. 649–661. Fulltekst i vitenarkiv Vis sammendrag

  Amplified fragment length polymorphism (AFLP) and random amplified polymorphic DNA ( RAPD) analyses were performed on six populations ( a total of 89 individuals) of Phytolacca dodecandra ( endod) collected in Ethiopia. The populations were selected based on our previous investigation to represent two altitude groups: lowland/central-highland ( 1600 - 2500 m) and highland ( 2501 - 3000 m). A total of 197 AFLP and 68 RAPD markers were scored from 5 primer pairs and 12 random primers, respectively. The overall patterns obtained for AFLPs and RAPDs from diversity, cluster and principal component analyses were very comparable. However, the moderate correlation ( r = 0.56) between AFLP and RAPD similarity matrices as well as the discrepancies in diversity estimates between the two techniques in some populations and in the lowland/central-highland plants could be due to differences in sensitivity of reaction conditions, bias in scoring of bands, number of markers used for analyses, and/or parts of the genome surveyed. For both AFLP and RAPD, the lowland/central-highland populations showed higher polymorphism and Shannon information measure ( H) than the highlands. Cluster and principal component analyses performed for both marker types have also clearly demonstrated the differentiation of all the lowland/central highland plants from those of the highlands, in agreement with our previous conclusion. Markers scored from any of the five AFLP primer pairs were sufficient to clearly distinguish the two altitude groups; with RAPD, selection of about 8 informative markers produced by seven random primers was needed for the same purpose.

• Stedje, Brita (2001). Notes on African plants: Hyacinthaceae. The generic delimitation within Hyacinthaceae, a comment on works by F. Speta. Bothalia: African Biodiversity & Conservation. ISSN 0006-8241. 31, s. 192–195. Fulltekst i vitenarkiv
• Semagn, Kassa; Stedje, Brita & Bjørnstad, Åsmund (2001). Analysis of genetic diversity and structure in Ethiopian populations of Phytolacca dodecandra using RAPD. Hereditas. ISSN 0018-0661. 135(1), s. 51–60. doi: 10.1111/j.1601-5223.2001.00051.x. Fulltekst i vitenarkiv
• Stedje, Brita (2001). Generic delimitation of Hyacinthaceae, with special emphasis on sub-Saharan genera. Systematics and Geography of Plants. ISSN 1374-7886. 71, s. 449–454. Fulltekst i vitenarkiv Vis sammendrag

  Different opinions on the generic delimitation of Hyacinthaceae are reviewed with emphasis on sub-Saharan taxa. Morphological characters used for identification of genera as well as results from DNA-sequencing data are discussed in relation to different generic delimitations proposed by various authors. Recommendations on the generic delimitation of the family are put forward. The use of a wide generic concept is suggested with emphasis on the use of qualitative characters as diagnostic characters for genera

• Semagn, Kassa; Stedje, Brita & Bjørnstad, Åsmund (2001). Analysis of genetic diversity and structure in Ethiopian populations of Phytolacca dodecandra using RAPD. Hereditas. ISSN 0018-0661. 135, s. 51–60. Fulltekst i vitenarkiv
• Semagn, Kassa; Bjørnstad, Åsmund; Stedje, Brita & Bekele, Endashaw (2000). Comparison of multivariate methods for the analysis of genetic resources and adaption Phytolacca dodecandra using RAPD. Theoretical and Applied Genetics. ISSN 0040-5752. 101, s. 1145–1154. Fulltekst i vitenarkiv
• Semagn, Kassa; Bjørnstad, Åsmund; Stedje, Brita & Bekele, E. (2000). Comparison of multivariate methods for the analysis of gentic resources and adaptation in Phytolacca dodecandra using RAPD. Theoretical and Applied Genetics. ISSN 0040-5752. 101, s. 1145–1154. doi: 10.1007/s001220051591. Fulltekst i vitenarkiv
• Stedje, Brita (2000). Evolutionary relationships of the genera Drimia, Thuranthos, Bowiea and Schizobasis, elucidated by morphological and chloroplast DNA sequence. I Wilson, Karen L. & Morrison, David A. (Red.), Monocots, systematics and evolution. CSIRO Publishing. s. 414–417. Fulltekst i vitenarkiv
• Stedje, Brita (1998). Phylogenetic relationships and generic delimitation of sub-Saharan Scilla L. (Hyacinthaceae) and allied African genera as inferred from morphological and DNA sequence data. Plant Systematics and Evolution. ISSN 0378-2697. 211, s. 1–11. Fulltekst i vitenarkiv
• Stedje, Brita (1998). Phylogenetic relationships and generic delimitation of sub-Saharan Scilla L. (Hyacinthaceae) and allied African genera as inferred from morphological and DNA sequence data. Plant Systematics and Evolution. ISSN 0378-2697. 211, s. 1–11. Fulltekst i vitenarkiv
• Jakobsen, Kjetill Sigurd; Stedje, Brita; Gyllensten, U. & Ellingboe, J. (1997). Update to: A general approach for PCR-amplification and sequencing of chloroplast DNA from crude vascular plant and algal tissue, The PCR technique: DNA sequencing II. Eaton Publisheing Co Natick, MA, USA. s. 181–184. Fulltekst i vitenarkiv
• Stedje, Brita (1997). The seed surface - as taxonomic tool in tropical lilies. ?. 18, s. 33–38. Fulltekst i vitenarkiv
• Jakobsen, Kjetill Sigurd & Stedje, Brita (1997). Update to: A general approach for PCR-amplification and sequencing of chloroplast DNA from crude vascular plant and algal tissue. I Gyllensten, U. & Ellingboe, J. (Red.), The PCR technique: DNA sequencing II. Eaton Publisheing Co Natick, MA, USA. s. 181–184. Fulltekst i vitenarkiv
• Stedje, Brita (1997). Hyacinthaceae. I Edwards, Sue; Demissew, Sebsebe & Hedberg, Inga (Red.), Flora of Ethiopia and Eritrea: Hydrocharitaceae to Arecaceae. National Herbarium, Addis Ababa. ISSN 9789197128544. s. 138–147. Fulltekst i vitenarkiv
• Stedje, Brita (1996). Karyotypes of some species of Hyacinthaceae from Ethiopia and Kenya. Nordic Journal of Botany (NJB). ISSN 0107-055X. 16, s. 121–126. Fulltekst i vitenarkiv
• Stedje, Brita (1996). Hyacinthaceae. I Polhill, Roger M. (Red.), Flora of Tropical East Africa. Balkema. Fulltekst i vitenarkiv
• Stedje, Brita (1995). The seed surface - as a taxonomic tool in tropical lilies. I Nordal, Inger (Red.), Seed, fruit, fertility - Proceedings from an international symposium dedicated to prof. Rolf Y. Berg in connection with his 70th birthday. Det Norske videnskaps-akademi i Oslo. ISSN 9788290888225. s. 33–38. Fulltekst i vitenarkiv
• Brochmann, Christian; Borgen, Liv & Stedje, Brita (1993). Crossing relationships and chromosome numbers of Nordic populations of Draba (Brassicaceae), with emphasis on the D. alpina complex. Nordic Journal of Botany (NJB). ISSN 0107-055X. 13, s. 121–147. Fulltekst i vitenarkiv
• Brochmann, Christian; Stedje, Brita & Borgen, Liv (1992). Gene flow across ploidal levels in Draba (Brassicaceae). Evolutionary trends in plants. ISSN 1011-3258. 6, s. 125–134. Fulltekst i vitenarkiv

Se alle arbeider i NVA

• Stedje, Brita (2023). Plantesystematikk, versjon 2. Norsk botanisk forening. ISBN 9788269267020. 76 s. Fulltekst i vitenarkiv
• Stedje, Brita (2020). Plantesystematikk. Norsk Botanisk Forening. ISBN 9788299858366. 75 s. Fulltekst i vitenarkiv
• Bjorå, Charlotte Sletten; Bjureke, Kristina; Borgen, Liv; Danielsen, Dag Inge; Ervik, Finn & Finnanger, Anne [Vis alle 8 forfattere av denne artikkelen] (2011). Botanisk hage. En oase i Oslo. Universitetet i Oslo. ISBN 9788279700258. 127 s. Fulltekst i vitenarkiv

Se alle arbeider i NVA

• Yifru, Mistire; Stedje, Brita; Wondimu, Tigist; Demissen, Sebsebe & Bekele, Tamrat (2022). Phylogenetic relationship of Kniphofia species in Ethiopia: A study using DNA sequences data from four chloroplast and two nuclear markers. Fulltekst i vitenarkiv
• Yifru, Mistire; Stedje, Brita; Wondimu, Tigist; Demissen, Sebsebe & Bekele, Tamrat (2022). Molecular phylogeny of Ethiopian Artemisia species based on two nuclear ribosomal DNA (Its & Ets) and three plastid DNA (Psba-Trnh, Matk & Trnl-Trnf) regions. Fulltekst i vitenarkiv
• Løken, Solveig Bua; Bendiksby, Mika & Stedje, Brita (2022). A HTS approach for delimiting taxa of Drimiopsis, Ledebouria and Resnova (Asparagaceae, subfamily Scilloidea). Fulltekst i vitenarkiv
• Løken, Solveig Bua; Bendiksby, Mika & Stedje, Brita (2020). Phylogeny, character state evolution and species delimitation in Drimiopsis, Ledebouria and Resnova (Asparagaceae, subfamily Scilloidea). Fulltekst i vitenarkiv
• Løken, Solveig Bua; Bendiksby, Mika & Stedje, Brita (2019). LEDEBOURIA & FRIENDS - Phylogeny, character state evolution and species delimitation in three African monocot genera: Drimiopsis, Ledebouria and Resnova (Asparagaceae, subfamily Scilloidea). Fulltekst i vitenarkiv
• Struck, Torsten H; Feder, Jeffrey L.; Bendiksby, Mika; Birkeland, Siri; Oliveira, Josè Cerca De & Gusarov, Vladimir [Vis alle 13 forfattere av denne artikkelen] (2018). Cryptic Species – More Than Terminological Chaos: A Reply to Heethoff. Trends in Ecology & Evolution. ISSN 0169-5347. 33(5), s. 310–312. doi: 10.1016/j.tree.2018.02.008. Fulltekst i vitenarkiv
• Stedje, Brita (2018). Fordelene med et tykt godt skjørt. Fulltekst i vitenarkiv
• Stedje, Brita (2018). Liljefamilien før og nå. Fulltekst i vitenarkiv
• Bjorå, Charlotte Sletten; Stedje, Brita; Bendiksby, Mika; Kativu, Shakkie & Nordal, Inger (2017). A phylogenetic analysis of Anthericum and Chlorophytum. Fulltekst i vitenarkiv
• Bjorå, Charlotte Sletten; Stedje, Brita & Bendiksby, Mika (2017). A phylogenetic analysis of Anthericum L. and Chlorophytum Ker Gawl. (Asparagaceae). Fulltekst i vitenarkiv
• Stedje, Brita; Mwafongo, Elizabeth Brighton Mvula & Brysting, Anne Krag (2017). Subgeneric delimitation and character evolution in Albuca subg. Albuca (Asparagaceae subfamily Scilloideae). Fulltekst i vitenarkiv
• Nordal, Inger; Bjorå, Charlotte Sletten & Stedje, Brita (2017). Training in the North of Researchers from the South: Experiences from Nordic-African collaboration. Scientia Danica, Series B, Biologica. ISSN 1904-5484. 6, s. 187–197. Fulltekst i vitenarkiv Vis sammendrag

  Norwegian universities have trained students and other scholars from the South within fields related to African plant diversity through the last decades. The activities were funded by NUFU, the Norwegian Council of Universities Committee for Development Research and Education, and 30 students successfully obtained PhD degrees in taxonomy and other biodiversity related fields, and all but a few have entered into scientific position at universities or other relevant research institutes in Africa. Most collaboration involved Zimbabwe, Malawi, Ethiopia, and Kenya, and though successful, they all faced the challenges of multi-institutional and multi-cultural teaching and research collaboration. Basic research within botanical diversity is better taken care of when the university councils own and administer the projects, compared to the alternative ownership by aid agencies.

• Nordal, Inger; Bjorå, Charlotte Sletten & Stedje, Brita (2015). Training in North of researchers from South. Fulltekst i vitenarkiv
• Stedje, Brita (2014). Fordelene med et tykt, godt skjørt -om kvinner på naturvitenskaplige ekspedisjoner i Afrika. Fulltekst i vitenarkiv
• Stedje, Brita; Bjorå, Charlotte Sletten & Bakkestuen, Vegar (2014). Identifying biodiversity hotspots for Anthericum and Chlorophytum (Asparagaceae) in East Africa by using multiple diversity measures. Fulltekst i vitenarkiv
• Stedje, Brita; Olet, Eunice Apio & Lye, Kåre (2014). Numerical taxonomy, crossing relationships and chromosome numbers of Solanum section Solanum in Uganda. Fulltekst i vitenarkiv
• Stedje, Brita; Bakkestuen, Vegar & Bjorå, Charlotte Sletten (2014). Identifying biodiversity hotspots for Anthericum and Chlorophytum (Asparagaceae) in East Africa by using multiple diversity measures. Fulltekst i vitenarkiv
• Bjorå, Charlotte Sletten; Demissew, Sebsebe; Stedje, Brita & Nordal, Inger (2008). On generic delimitation of Anthericum versus Chlorophytum and the lacking homology of complex nodes. Fulltekst i vitenarkiv
• Stedje, Brita (2008). Wollemia - et tre fra dinosaurenes tid. [Radio]. Nitimen P1. Fulltekst i vitenarkiv
• Bjorå, Charlotte Sletten; Hoell, Gry; Stedje, Brita & Nordal, Inger (2007). A phylogenetic analysis of Anthericum and Chlorophytum. Fulltekst i vitenarkiv
• Nyenya, Ratidzay Takawira; Stedje, Brita & Nordal, Inger (2007). Molecular systematics of the genus Sansevieria in southern Africa, a preliminary study. Fulltekst i vitenarkiv
• Mwafongo, Elizabeth Brighton Mvula & Stedje, Brita (2007). Molecular studies in the genus Albuca L. in the Flora Zambesiaca region. Fulltekst i vitenarkiv
• Stedje, Brita (2006). Om kapplandets flora. Fulltekst i vitenarkiv
• Nordal, Inger & Stedje, Brita (2005). Paraphyletic taxa should be accepted. Taxon. ISSN 0040-0262. 54. Fulltekst i vitenarkiv
• Bjorå, Charlotte Sletten; Hoell, Gry; Stedje, Brita & Nordal, Inger (2005). The genera Anthericum and Chlorophytum (Anthericaceae), evolution and generic delimitation. Fulltekst i vitenarkiv
• Mirre, Virginia; Elven, Reidar; Stedje, Brita; Suda, Jan & Brochmann, Christian (2005). Migration history and polyploidization in bipolar plants: the genus Empetrum (Crowberries). Fulltekst i vitenarkiv
• Jørgensen, Marte; Elven, Reidar; Stedje, Brita & Brochmann, Christian (2005). Evolutionary lineages and species delimitation in the Saxifraga rivularis complex. Fulltekst i vitenarkiv
• Kwembeya, Ezekeil Gwinyai; Bjorå, Charlotte Sletten; Stedje, Brita & Nordal, Inger (2005). Phylogenetic analysis of the genus Crinum (Amaryllidaceae)with emphasis on tropical African species. Fulltekst i vitenarkiv
• Stedje, Brita & Bjorå, Charlotte Sletten (2005). Hvorfor drar botanikere til Afrika? Palmebladet. ISSN 1503-4593. 5, s. 12–15. Fulltekst i vitenarkiv
• Jørgensen, Marte Holten; Gabrielsen, Tove M; Elven, Reidar; Stedje, Brita & Brochmann, Christian (2005). Evolutionary lineages and species delimitation in the Saxifraga rivularis complex. Fulltekst i vitenarkiv
• Stedje, Brita (2005). Innslag om sisalagave i FrokostTV, NRK. [TV]. NRK. Fulltekst i vitenarkiv
• Stedje, Brita (2004). Sisalagave i ferd med å sprenge taket i veksthus i Botanisk hage. [TV]. NRK, Østlandssendingen. Fulltekst i vitenarkiv
• Stedje, Brita (2004). Sisalagave i ferd med å sprenge taket i veksthus i Botanisk hage. [Radio]. NRK P1, Østlandssendingen. Fulltekst i vitenarkiv
• Stedje, Brita (2004). Kjøttetende planter. [Radio]. NRK P2, Wok. Fulltekst i vitenarkiv
• Jørgensen, Marte Holten; Gabrielsen, Tove M; Elven, Reidar; Stedje, Brita & Brochmann, Christian (2003). Reticulate evolution and species delimitation in the arctic Saxifraga rivularis (Highland Saxifrage) complex. Fulltekst i vitenarkiv
• Stedje, Brita (2003). Fra rariteter til fargesprakende blomsterprakt, inntrykk fra Kapplandets flora. Fulltekst i vitenarkiv
• Stedje, Brita (2003). Systematics and evolution of African species of the genus Ledebouria Roth. (Hyacinthaceae). Fulltekst i vitenarkiv
• Mirré, Virginia; Stedje, Brita; Albert, Victor Anthony & Brochmann, Christian (2003). Phylogeny, migration, and evolution in a bipolar model group: the genus Empetrum (Crowberry). Fulltekst i vitenarkiv
• Jørgensen, Marte H; Gabrielsen, Tove M; Elven, Reidar; Stedje, Brita & Brochmann, Christian (2003). Reticulate evolution and species delimitation in the arctic Saxifraga rivularis (Highland Saxifrage) complex. Fulltekst i vitenarkiv
• Stedje, Brita (2002). Genmodifiserte planter, matresurs eller økologisk katastrofe? Fulltekst i vitenarkiv
• Stedje, Brita (2002). Genmodifiserte planter, matresurs eller økologisk katastrofe? Fulltekst i vitenarkiv
• Stedje, Brita (2000). Sisalagave, Agave sisalana. Botaniske Ark. 12. Fulltekst i vitenarkiv
• Stedje, Brita (2000). Tøyenparken i Oslo: Skjønnhet og lærdom. Skogeieren. ISSN 0037-6396. 16. Fulltekst i vitenarkiv
• Stedje, Brita; Wilson, K.L. & Morrison, D. (1999). Evolutionary relationships of the genera Drimia, Thuranthos, Bowiea and Schizobasis, elucidated by morphological and chloroplast DNA sequence data. Fulltekst i vitenarkiv
• Brochmann, Christian; Borgen, Liv & Stedje, Brita (1989). Chromosome numbers and crossing experiments in Nordic populations of Draba. Fulltekst i vitenarkiv
• Brochmann, Christian; Borgen, Liv & Stedje, Brita (1989). Chromosome numbers and crossing experiments in Nordic populations of Draba (Brassicaceae). Fulltekst i vitenarkiv
• Brochmann, Christian; Borgen, Liv & Stedje, Brita (1989). Chromosome numbers and crossing experiments in Nordic populations of Draba (Brassicaceae). Fulltekst i vitenarkiv
• Kwembeya, Ezekeil Gwinyai & Stedje, Brita (2006). The genus Crinum (Amaryllidaceae) its taxonomy, phylogeny and consrvation in Southern Tropical Africa. Universitetet i Oslo. Fulltekst i vitenarkiv
• Jørgensen, Marte Holten; Brochmann, Christian; Stedje, Brita & Elven, Reidar (2004). Evolutionary lineages and species delimitation in the Saxifraga rivularis complex. Universitetet i Oslo. Fulltekst i vitenarkiv Vis sammendrag

  The delimitation of taxa in the Saxifraga rivularis complex is controversial. In the checklist for the Pan-Arctic Flora, the complex was tentatively divided into five species: the circumpolar S. hyperborea, the amphi-Atlantic S. rivularis and three amphi-Pacific taxa (S. bracteata, S. flexuosa and S. arctolitoralis). Two ploidal levels (2n = 26, 52) are known, indicating a possible history of reticulate evolution. In the present study, a combined approach using molecular (AFLP; 42 populations, 119 plants), ploidal (flow cytometry; 43 populations, 71 plants) and morphometric (81 populations, 216 plants) data were used to identify evolutionary lineages within the complex, and to delimit taxonomic species. Three distinct evolutionary lineages were identified in all analyses of the AFLP data: the Saxifraga bracteata lineage, the S. flexuosa/hyperborea lineage and the S. arctolitoralis/rivularis lineage. The three lineages had different DNA ratios: 0.20-0.21, 0.16-0.17 and 0.36-0.38, respectively. The DNA ratios in combination with the intermediate position of the S. arctolitoralis/rivularis lineage between the two others in multivariate analysis of both genetic and morphological data, suggest an allopolyploid origin of this lineage, with the other two lineages as progenitors. No single morphological character included in this study unambiguously separated among the lineages. They were, however, differentiated by combinations of characters, thus the lineages should be recognised at species level: Saxifraga bracteata, S. hyperborea (including S. flexuosa) and S. rivularis (including S. arctolitoralis). Within the Saxifraga flexuosa/hyperborea lineage two genetical groups were identified, correlating with geography rather than the morphological pattern giving rise to the current taxonomic treatment. The groups may reflect genetical differentiation in glacial refugia through the last glaciation, but are not yet reflected in morphological differentiation, and a division into two taxa is therefore not supported. In the S. arctolitoralis/rivularis lineage, the separation of a Beringian population representing S. arctolitoralis from the Atlantic populations in AFLP data and morphology and the very distant geographical range suggest a subspecific ranking of S. arctolitoralis. Most of the variation within the S. rivularis complex is found in North Pacific areas. This, in combination with the proposed connection to S. bracteata, suggests a Beringian origin for the S. arctolitoralis/rivularis lineage with a later expansion to Atlantic areas.

• Stedje, Brita (1998). Forelesninger i høyere planters systematikk, kompendium til kurset B110, Norges landbrukshøgskole. Landbruksbokhandelen. Fulltekst i vitenarkiv

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