Homeostasis of common bean populations with different genetic structures



Título del documento: Homeostasis of common bean populations with different genetic structures
Revista: CBAB. Crop breeding and applied biotechnology
Base de datos: PERIÓDICA
Número de sistema: 000269900
ISSN: 1518-7853
Autores: 1


2
Instituciones: 1Universidade Federal de Lavras, Departamento de Biologia, Lavras, Minas Gerais. Brasil
2Universidade Federal de Lavras, Departamento de Ciencias Exatas, Lavras, Minas Gerais. Brasil
Año:
Periodo: Jun
Volumen: 7
Número: 2
Paginación: 111-116
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental
Resumen en inglés Eight lines of common bean, a mixture in equal proportions (MP) and the F2 generation of the multiple hybrids (MH) between them were analyzed to verify whether they differ in homeostasis and phenotypic plasticity. The experiments were conducted in 20 environments (seasons and locations) from November 2004 to December 2005, in Alto Paranaíba and the south of Minas Gerais state. Based on the mean yield of the environments the stability was evaluated by the ecovalence values (Wi 2). To estimate the repeatability of the stability parameters the 20 environments were separated in two groups of 10, simulating 1000 possibilities. The MH and MP were the most stable. Nevertheless, high stability was also identified in some pure lines. The repeatability of mean grain yield (rk 2=0.73) was higher than Wi 2 (rk 2=0.18). The chances of success of selection for the smallest contribution to the G x E interaction are small
Disciplinas: Agrociencias
Palabras clave: Fitotecnia,
Leguminosas,
Biotecnología,
Mejoramiento genético,
Frijol,
Phaseolus vulgaris,
Homeostasis,
Fenotipos
Keyword: Agricultural sciences,
Crop husbandry,
Legumes,
Genetic improvement,
Bean,
Phaseolus vulgaris,
Homeostasis,
Phenotypes
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