期刊
CROP BREEDING AND APPLIED BIOTECHNOLOGY
卷 7, 期 2, 页码 111-116出版社
BRAZILIAN SOC PLANT BREEDING
DOI: 10.12702/1984-7033.v07n02a01
关键词
individual buffering; population buffering; repeatability
Eight lines of common bean, a mixture in equal proportions (MP) and the F-2 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 Paranaiba and the south of Minas Gerais state. Based on the mean yield of the environments the stability was evaluated by the ecovalence values (W,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 (r(k)(2)=0.73) was higher than W-i(2) (r(k)(2) = 0.18). The chances of success of selection for the smallest contribution to the G x E interaction are small.
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