Manipulation of apomixis in Brachiaria breeding

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dc.creatorMiles, John W.
dc.creatorValle, Cacilda Borges do
dc.date1996
dc.date2015-01-28T14:17:06Z
dc.date2015-01-28T14:17:06Z
dc.date.accessioned2026-06-27T14:31:27Z
dc.descriptionUntil 10 years ago, genetic improvement of Brachiaria species depended entirely on selection among naturally existing genotypes, genetic recombination being impossible because of prevailing apomictic reproduction. However, recent advances in understanding the genetics and cytogenetics of Brachiaria, and the creation of a tetraploid sexual B. ruziziensis have opened the way for controlled genetic manipulation. Two relevant gene pools are discussed. Genetic recombination is now possible in the B. ruziziensis/B. brizantha/B. decumbens pool. Breeding in the B. humidicola/B. dictyoneura/B. jubata pool awaits the development of a compatible source of sexuality. Present breeding initiatives aim to create apomictic genotypes combining spittlebug resistance and edaphic adaptation with other desirable attributes. Evaluation methods need to be improved. Current breeding schemes for Brachiaria, which are described, seek to exploit apomixis. They are empirical, and are based on general principles of quantitative genetics and our current limited knowledge of the inheritance of reproductive mode and other important traits. Clearer definition of relevant breeding objectives and better evaluation methodology will improve the efficiency and effectiveness of Brachiaria breeding.
dc.identifierhttps://hdl.handle.net/10568/54885
dc.identifier.urihttp://hdl.handle.net/123456789/80671
dc.languageen
dc.publisherInternational Center for Tropical Agriculture
dc.publisherEmpresa Brasileira de Pesquisa Agropecuária
dc.rightsOpen Access
dc.sourceMiles, John W.; Valle, Cacilda Borges do. 1996. Manipulation of apomixis in Brachiaria breeding. In: Miles, John W; Maass, Brigitte L; Valle, Cacilda Borges do; Kumble, Vrinda (eds.). Brachiaria: Biology, agronomy, and improvement. Centro Internacional de Agricultura Tropical (CIAT); Campo Grande, BR : Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA), Centro Nacional de Pesquisa de Gado de Corte (CNPGC), Cali, CO. p. 164-177. (CIAT publication no. 259)
dc.subjectbrachiaria
dc.subjectapomixis
dc.subjectreproduction
dc.subjectrecombination
dc.subjectplant breeding
dc.subjectnitrogen fixation
dc.subjecttesting
dc.subjectreproducción
dc.subjectrecombinación
dc.subjectfitomejoramiento
dc.subjectfijación del nitrógeno
dc.subjectensayo
dc.titleManipulation of apomixis in Brachiaria breeding
dc.typeBook Chapter

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Centro Internacional de Agricultura Tropical (CIAT)