Natural selection and family X location interaction in the common (dry) bean plant
Genet. mol. biol
;
25(3): 343-347, Sept. 2002. tab
Artículo
en Inglés
| LILACS
| ID: lil-335778
RESUMO
Natural selection takes place while advancing generations of segregant populations of self pollinating species by the population (bulk) method. There is evidence that it maintains the individuals with greater grain yield. The question arises whether natural selection preserves the individuals which are more adapted only to the environment where the generation advance occurred, that is, if it contributes to increasing the genotype x environment interaction in the family assessment. This study was carried out to check this hypothesis in the common bean plant using families derived from a segregating population from a cross between the Carioca MG x ESAL 686 cultivars. The segregating populations increase in homozygosity was obtained by the population (bulk) method until the F14 generation, in three distinct locations in Minas Gerais state Lavras, Lambari and Patos de Minas. Forty-seven F1415 families were randomly taken from the population in each location and later multiplied to obtain F1416 families. These families were jointly assessed with three controls using a triple 12 x 12 lattice design in the three locations of generation advance in the wet season of 1998/1999. All the estimated parameters showed that while advancing segregant populations by the population (bulk) method, natural selection acted to preserve the individuals which are more adapted to the environment in which they were advanced
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Selección Genética
/
Phaseolus
/
Ambiente
Idioma:
Inglés
Revista:
Genet. mol. biol
Asunto de la revista:
Genética
Año:
2002
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
UFLA/BR
/
UFV/BR
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