Natural selection and family X location interaction in the common (dry) bean plant

Genetics and Molecular Biology

Luís Henrique Pirola²  Magno Antonio Patto Ramalho²  José Eustáquio S. Carneiro¹  Ângela De Fátima Barbosa Abreu¹ 

[1] ,UFLA Departamento de Biologia Lavras MG ,Brazil

关键词: genotype x environment interaction;    heritability;    common bean;    Phaseolus vulgaris L.;    natural selection;   

DOI  :  10.1590/S1415-47572002000300016

来源: SciELO

【 摘 要 】

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 F14:15 families were randomly taken from the population in each location and later multiplied to obtain F14:16 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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License