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Crossing incompatibility in some bean cultivars utilized in Brazil

Andre Luis Vieira; Magno Antonio Patto Ramalho; Joćo Bosco dos Santos

Departamento de Biologia, Escola Superior de Agricultura de Lavras, Caixa Postal 37, 37200 Lavras, MG, Brasil

ABSTRACT

In crosses involving common bean cultivars (Phaseolus vulgaris L.) that produce large seeds with others that produce small seeds, abnormal development of the hybrid plants has been observed, and no seeds are produced. This apparent barrier limits the spontaneous flow of genes through different cultivars. In a diallel cross involving 11 cultivars, 12 of the 55 hybrids obtained (21.8%) were incompatible. The probable genotypes of the cultivars involved are presented in this paper to enable breeders to cross only compatible materials.

Keywords: crossing; incompatibility; bean; cultivars; Brazil.

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