Combining ability as a strategy for selecting common bean parents and populations resistant to white mold
AUTOR(ES)
Ferreira, Lenio Urzeda, Melo, Patrícia Guimarães Santos, Vieira, Rogério Faria, Lobo Junior, Murillo, Pereira, Helton Santos, Melo, Leonardo Cunha, Souza, Thiago Lívio Pessoa Oliveira de
FONTE
Crop Breed. Appl. Biotechnol.
DATA DE PUBLICAÇÃO
2018-09
RESUMO
Abstract Common bean parents and populations resistant to white mold (WM, caused by Sclerotinia sclerotiorum) were selected based on estimates of general combining ability (GCA) and specific combining ability (SCA) for WM severity in three field nurseries in Brazil. Twenty-seven populations were obtained by partial diallel crosses between parents from two groups: GI) three sources of partial resistance identified abroad and GII) nine Brazilian cultivars and elite lines. Populations were advanced in bulk up to the F6 generation. The overall mean of WM severity from combined analysis ranged from 2.83 to 5.03 (scale of 1 to 9 scores) in the F6 population. The score of the susceptible control BRS Requinte was 7.21. The GI parents K-59, in Oratórios, MG, and Viçosa, MG, and K-407 and PI204717, in Goianira, GO, contributed to increase resistance to WM. The most promising populations for obtaining elite lines resistant to WM were K-59/BRS Executivo, PI204717/BRS Campeiro, PI204717/Jalo Precoce, K-59/BRS Radiante, and K-407/BRS Cometa.
Documentos Relacionados
- Selection of carioca common bean progenies resistant to white mold
- Choice of common bean parents based on combining ability estimates
- Combining Ability for Resistance to White Mold in a Diallel Cross of Soybean
- Increasing the resistance of common bean to white mold through recurrent selection
- Recurrent selection in common bean aiming at resistance to white mold in a greenhouse