Genetic diversity and population structure of Brachiaria (syn. Urochloa) ecotypes from Uganda

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cg.authorship.typesCGIAR and developing country instituteen
cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationNational Livestock Resources Research Institute, Ugandaen
cg.contributor.affiliationInternational Livestock Research Instituteen
cg.contributor.affiliationRwebitaba Zonal Agricultural Research and Development Institute, Ugandaen
cg.contributor.affiliationUniversity of Edinburghen
cg.contributor.crpLivestock
cg.contributor.donorDepartment of Foreign Affairs and Trade, Australiaen
cg.contributor.donorSyngenta Foundation for Sustainable Agricultureen
cg.contributor.donorBill & Melinda Gates Foundationen
cg.contributor.donorSwedish International Development Cooperation Agencyen
cg.contributor.donorDepartment for International Development, United Kingdomen
cg.coverage.countryUganda
cg.coverage.iso3166-alpha2UG
cg.coverage.regionAfrica
cg.coverage.regionSub-Saharan Africa
cg.coverage.regionEastern Africa
cg.creator.identifierSita Ghimire: 0000-0001-8930-1384
cg.creator.identifierAppolinaire Djikeng: 0000-0001-9271-3419
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.3390/agronomy10081193en
cg.isijournalISI Journalen
cg.issn2413-4155en
cg.issue8en
cg.journalAgronomyen
cg.reviewStatusPeer Reviewen
cg.subject.ilriCROP-LIVESTOCKen
cg.subject.ilriDAIRYINGen
cg.subject.ilriFEEDSen
cg.subject.ilriFODDERen
cg.subject.ilriFORAGESen
cg.subject.ilriGENETICSen
cg.subject.ilriLIVELIHOODSen
cg.subject.ilriLIVESTOCKen
cg.subject.ilriRESEARCHen
cg.volume10en
dc.contributor.authorNamazzi, C.en
dc.contributor.authorSserumaga, J.P.en
dc.contributor.authorMugerwa, S.en
dc.contributor.authorKyallo, Martina M.en
dc.contributor.authorMutai Collins, K.en
dc.contributor.authorMwesigwa, R.en
dc.contributor.authorDjikeng, Appolinaireen
dc.contributor.authorGhimire, Sita R.en
dc.date.accessioned2020-09-21T11:42:02Zen
dc.date.available2020-09-21T11:42:02Zen
dc.identifier.urihttps://hdl.handle.net/10568/109551
dc.titleGenetic diversity and population structure of Brachiaria (syn. Urochloa) ecotypes from Ugandaen
dcterms.abstractBrachiaria (syn. Urochloa) grass is an important tropical forage of African origin that supports millions of livestock and wildlife in the tropics. Overgrazing, conversion of grasslands for crop production and non-agricultural uses, and the introduction of improved forages have threatened the natural diversity of Brachiaria grass in Uganda. This study established a national collection of Brachiaria ecotypes in Uganda and analyzed them for genetic diversity and population structure using 24 simple sequence repeats (SSR) markers. These markers had a high discriminating ability with an average polymorphism information content (PIC) of 0.89 and detected 584 alleles in 99 ecotypes. Analysis of molecular variance revealed a high within populations variance (98%) indicating a high gene exchange or low genetic differentiation (PhiPT = 00.016) among the ecotype populations. The Bayesian model based clustering algorithm showed three allelic pools in Ugandan ecotypes. The principal component analysis (PCA) of ecotypes, and Neighbor-joining (NJ) tree of ecotypes and six commercial cultivars showed three main groups with variable membership coefficients. About 95% of ecotype pairs had Rogers’ genetic distance above 0.75, suggesting most of them were distantly related. This study confirms the high value of these ecotypes in Brachiaria grass conservation and improvement programs in Uganda and elsewhere.en
dcterms.accessRightsOpen Access
dcterms.audienceScientistsen
dcterms.audienceAcademicsen
dcterms.available2020-08-14
dcterms.bibliographicCitationNamazzi, C., Sserumaga, J.P., Mugerwa, S., Kyalo, M., Mutai, C., Mwesigwa, R., Djikeng, A. and Ghimire, S. 2020. Genetic diversity and population structure of Brachiaria (syn. Urochloa) ecotypes from Uganda. Agronomy 10(8):1193.en
dcterms.issued2020-08-14
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherMDPIen
dcterms.subjectbrachiariaen
dcterms.subjecturochloaen
dcterms.subjectecotypesen
dcterms.subjectmixed farmingen
dcterms.subjectforageen
dcterms.subjectgrassesen
dcterms.typeJournal Article

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