Recurrent selection in common bean aiming at resistance to white mold in a greenhouse

AUTOR(ES)

Lopes, Fernanda Souza

FONTE

Crop Breed. Appl. Biotechnol.

DATA DE PUBLICAÇÃO

11/04/2019

RESUMO

Abstract The objectives of this study were to estimate the genetic progress of mass selection for white mold resistance in common bean, evaluated in a greenhouse in cycle XII of recurrent selection (900 S0 plants), and compare it with field selection in previous cycles. In addition, progress was compared with microsatellite marker-assisted selection (MAS) among S0:1 progenies. The 79 most resistant S0:1 were evaluated under field conditions using a 9×9 simple lattice design; the 21 best S0:2 and those selected from cycles IX, X, and XI were evaluated in a 6×6 triple lattice. Genetic progress was 4.25% per cycle, and 12.17% between cycles XI and XII, showing higher selection efficiency in the greenhouse. The phenotypic gain and gain from assisted selection among the S0:1 progenies were 5.08 and 1.57%, respectively, and the low value of MAS was due to only two markers (BM189 and BMD20) explaining the resistance.

Documentos Relacionados

• Increasing the resistance of common bean to white mold through recurrent selection
• Selection of carioca common bean progenies resistant to white mold
• Eight cycles of recurrent selection for resistance to angular leaf spot in common bean.
• Combining ability as a strategy for selecting common bean parents and populations resistant to white mold
• Evaluation of recurrent selection families for tolerance to water deficit in common bean.