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Genetic diversity in pigeonpea [Cajanus cajan (L.) Millsp.] Landraces as revealed by simple sequence repeat markers

dc.contributor.authorSongok, S.
dc.contributor.authorFerguson, M.
dc.contributor.authorMuigai, Anne W.T.
dc.contributor.authorSilim, S.
dc.date.accessioned2019-12-04T11:10:51Z
dc.date.available2019-12-04T11:10:51Z
dc.date.issued2010
dc.identifier.citationSongok, S., Ferguson, M., Muigai, A.W. & Silim, S. (2010). Genetic diversity in pigeonpea [Cajanus cajan (L.) Millsp.] landraces as revealed by simple sequence repeat markers. African Journal of Biotechnology, 9(22), 3231-3241.
dc.identifier.issn1684-5315
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2283
dc.descriptionOpen Access Journal
dc.description.abstractGenetic relationships among 88 pigeonpea accessions from a presumed centre of origin and diversity, India and a presumed secondary centre of diversity in East Africa were evaluated using six microsatellite markers. Forty-seven (47) alleles were detected in the populations studied, with a mean of eight alleles per locus. Populations were defined by region (India and East Africa) and sub-populations by country in the case of East Africa and State in the case of India. Substantial differentiation among regions was evident from Roger’s modified distance and Wright’s F statistic. Greatest genetic diversity in terms of number of alleles, number of rare alleles and Nei’s unbiased estimate of gene diversity (H) was found in India as opposed to East Africa. This supports the hypothesis that India is the centre of diversity and East Africa is a secondary centre of diversity. Within East Africa, germplasm from Tanzania had the highest diversity according to Nei’s unbiased estimate of gene diversity, followed by Kenya and Uganda. Germplasm from Kenya and Tanzania were more closely related than that of Uganda according to Roger’s modified distance. Within India, results did not indicate a clear centre of diversity. Values of genetic distance indicated that genetic relationships followed geographical proximity.
dc.format.extent3231-3241
dc.language.isoen
dc.subjectCajanus Cajan
dc.subjectGenetic Variation
dc.subjectSimple Sequence Repeat
dc.subjectPigeonpea
dc.titleGenetic diversity in pigeonpea [Cajanus cajan (L.) Millsp.] Landraces as revealed by simple sequence repeat markers
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationJomo Kenyatta University of Agriculture and Technology
cg.contributor.affiliationInternational Crops Research Institute for the Semi-Arid Tropics
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionAsia
cg.coverage.regionEast Africa
cg.coverage.regionSouthern Africa
cg.coverage.countryIndia
cg.coverage.countryKenya
cg.coverage.countryMalawi
cg.coverage.countryMozambique
cg.coverage.countryTanzania
cg.coverage.countryUganda
cg.creator.identifierMorag Ferguson: 0000-0002-7763-5173
cg.identifier.urlhttps://www.ajol.info/index.php/ajb/article/view/80648
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectGenetic Improvement
cg.iitasubjectGrain Legumes
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.journalAfrican Journal of Biotechnology
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid91891
cg.targetaudienceScientists


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