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dc.contributor.authorRANGEL, P. H. N.pt_BR
dc.contributor.authorMORAIS, O. P. dept_BR
dc.contributor.authorZIMMERMANN, F. J. P.pt_BR
dc.date.accessioned2011-04-10T11:11:11Zpt_BR
dc.date.available2011-04-10T11:11:11Zpt_BR
dc.date.created2004-10-19pt_BR
dc.date.issued2002pt_BR
dc.identifier.citationCrop Breeding and Applied Biotechnology, v. 2, n. 3, p. 369-373, Sept. 2002.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/212564pt_BR
dc.descriptionOne line of research on irrigated rice genetic breeding programs at Embrapa consists of synthesizing wide genetic base populations followed by recurrent selection. This strategy ensures systematic continuous gains for grain yield and other traits of interest. To estimate the gains observed in three recurrent selection cycles in the CNA-IRAT 4 population, the grain yield data from 924 S0:2 families in 14 experiments carried out in various Brazilian states in the 1992/93, 1994/95 and 1997/98 growing seasons were analyzed. A triple lattice (two 10 x 10 and two 8 x 8 lattices) expérimental design was used in the first cycle and Federer augmented blocks in the two subsequent cycles. A non -significant gain was observed in the first cycle (only 15.7 kg/ha (0.28%). The gain observed in the second cycle and the mean gain observed due the selection in the first and second cycles were significante and of high magnitude (369.9 kg/ha (6.65%) and 259.9 kg/ha (4.67%), respectively). Results showed that recurrent selection applied to genetically divergent populations can result in considerable gains for grain yield.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectGenetic gainpt_BR
dc.subjectGenetic breedingpt_BR
dc.subjectIrrigadopt_BR
dc.titleGrain yield gains in three recurrent selection cycles in the CNA-IRAT 4 irrigated rice population.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2013-03-19T11:11:11Zpt_BR
dc.subject.thesagroArrozpt_BR
dc.subject.thesagroOryza Sativapt_BR
dc.subject.thesagroSeleção Recorrentept_BR
dc.subject.nalthesaurusricept_BR
riaa.ainfo.id212564pt_BR
riaa.ainfo.lastupdate2013-03-19pt_BR
dc.contributor.institutionPAULO HIDEO NAKANO RANGEL, CNPAFpt_BR
dc.contributor.institutionORLANDO PEIXOTO DE MORAIS, CNPAFeng
dc.contributor.institutionFRANCISCO JOSE P ZIMMERMANN, CNPAF.eng
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