Two cycles of recurrent selection in red bean breeding

Rocha, Gilmar Silvério da; Silva, Vanessa Maria Pereira e; Pereira, Alisson Campos; Carneiro, Pedro Crescêncio Souza; Peternelli, Luis Alexandre; Carneiro, José Eustáquio de Souza; Menezes Júnior, José Ângelo Nogueira de; Rezende Júnior, Laércio da Silva

Two cycles of recurrent selection in red bean breeding

2013

This study was carried out for the purpose of estimating genetic progress after two cycles of recurrent selection in red bean breeding and of obtaining new lines. In cycle zero, F 3:5 and F 3:6 families were evaluated. In cycle one, the families were extracted in generation F 5 and evaluated in generations F 5:6 and F 5:7 . As the families were evaluated in different years and generations, the estimate of genetic progress was obtained by simultaneously evaluating the 30 best lines obtained at the end of each cycle in experiments conducted through three crop seasons. After two cycles of recurrent selection, genetic progress, in the mean value of the crop seasons, was 7.5% for grain yield, 7% for grain appearance, 33.4% for resistance to rust and 13.2% for resistance to angular leaf spot. Lines of red beans were obtained with potential for being included in future Value for Cultivation and Use (VCU) testing for Minas Gerais, Brazil.

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