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

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cg.authorship.typesCGIAR and developing country instituteen_US
cg.authorship.typesCGIAR and advanced research instituteen_US
cg.contributor.affiliationNational Livestock Resources Research Institute, Ugandaen_US
cg.contributor.affiliationInternational Livestock Research Instituteen_US
cg.contributor.affiliationRwebitaba Zonal Agricultural Research and Development Institute, Ugandaen_US
cg.contributor.affiliationUniversity of Edinburghen_US
cg.contributor.crpLivestocken_US
cg.contributor.donorDepartment of Foreign Affairs and Trade, Australiaen_US
cg.contributor.donorSyngenta Foundation for Sustainable Agricultureen_US
cg.contributor.donorBill & Melinda Gates Foundationen_US
cg.contributor.donorSwedish International Development Cooperation Agencyen_US
cg.contributor.donorDepartment for International Development, United Kingdomen_US
cg.coverage.countryUgandaen_US
cg.coverage.iso3166-alpha2UGen_US
cg.coverage.regionAfricaen_US
cg.coverage.regionSub-Saharan Africaen_US
cg.coverage.regionEastern Africaen_US
cg.creator.identifierSita Ghimire: 0000-0001-8930-1384en_US
cg.creator.identifierAppolinaire Djikeng: 0000-0001-9271-3419en_US
cg.howPublishedFormally Publisheden_US
cg.identifier.doihttps://doi.org/10.3390/agronomy10081193en_US
cg.isijournalISI Journalen_US
cg.issn2413-4155en_US
cg.issue8en_US
cg.journalAgronomyen_US
cg.reviewStatusPeer Reviewen_US
cg.subject.ilriCROP-LIVESTOCKen_US
cg.subject.ilriDAIRYINGen_US
cg.subject.ilriFEEDSen_US
cg.subject.ilriFODDERen_US
cg.subject.ilriFORAGESen_US
cg.subject.ilriGENETICSen_US
cg.subject.ilriLIVELIHOODSen_US
cg.subject.ilriLIVESTOCKen_US
cg.subject.ilriRESEARCHen_US
cg.volume10en_US
dc.contributor.authorNamazzi, C.en_US
dc.contributor.authorSserumaga, J.P.en_US
dc.contributor.authorMugerwa, S.en_US
dc.contributor.authorKyallo, Martina M.en_US
dc.contributor.authorMutai Collins, K.en_US
dc.contributor.authorMwesigwa, R.en_US
dc.contributor.authorDjikeng, Appolinaireen_US
dc.contributor.authorGhimire, Sita R.en_US
dc.date.accessioned2020-09-21T11:42:02Zen_US
dc.date.available2020-09-21T11:42:02Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/109551en_US
dc.titleGenetic diversity and population structure of Brachiaria (syn. Urochloa) ecotypes from Ugandaen_US
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_US
dcterms.accessRightsOpen Accessen_US
dcterms.audienceScientistsen_US
dcterms.audienceAcademicsen_US
dcterms.available2020-08-14en_US
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_US
dcterms.issued2020-08-14en_US
dcterms.languageenen_US
dcterms.licenseCC-BY-4.0en_US
dcterms.publisherMDPIen_US
dcterms.subjectbrachiariaen_US
dcterms.subjecturochloaen_US
dcterms.subjectecotypesen_US
dcterms.subjectmixed farmingen_US
dcterms.subjectforageen_US
dcterms.subjectgrassesen_US
dcterms.typeJournal Articleen_US

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