Adaptabilidade e estabilidade produtiva em genótipos precoces de feijão no estado do Paraná

Abstract

ResumoNo desenvolvimento de cultivares de feijão precoce é imprescindível que este apresente elevado rendimento de grãos e comportamento previsível. O objetivo deste trabalho foi avaliar a adaptabilidade e a estabilidade fenotípica para rendimento de grãos em genótipos de feijão precoce. AbstractIn the development of early beans cultivars it is very important high grain yield and predictable behavior. The objective of this work was to assess adaptability and phenotypic stability grain yield in early common bean genotypes. The experiments were conducted in two cropping season in the following counties: Londrina, Irati, Pato Branco and Capitão Leonidas Marques (wet season 2004/2005); Pato Branco and Ponta Grossa (dry season 2005). Complete randomized block with three replications was used. In the maturation stage (R9) grain yield were assessed and the data were transformed to kg.ha -1 and corrected for 13% humidity. The individual and combined variance analyses indicated significant differences among genotypes. The genotype x environmental interaction was significant considering 1% probability, revealing that the genotypes evaluated performed differently according to the environment where the tests were done. The lines LPSIA 04 103, LPSIA 04 105 and LPSIA 04 107 showed general adaptability (β 1i =1), high phenotypic stability (σ 2 di =0), and superior average yield.

Selection of common bean lines with high agronomic performance and high calcium and iron concentrations

“…Therefore, all the evaluated lines can be considered of semi-early cycle and meet the demands of rural producers. The identification of common bean lines with an early cycle allows planning harvests for periods of less rain, the reduction of water consumption by irrigated crops, and the early freeing of the area for crop succession (Buratto et al, 2007).…”

Simultaneous selection in beans for stability and high agronomic performance

“…Flowering is strongly correlated with cycle in common bean (Burrato et al, 2007;Faria et al, 2009); therefore, this has been used to characterize early cycles. Hence, it is expected that common bean cultivars with adaptation and stability for flowering also show stability for cycle.…”

Produtividade de grãos, adaptabilidade e estabilidade de genótipos de soja de ciclos precoce e médio

“…Na condição da capacidade adaptativa, vale ressaltar que a soja é cultivada em várias regiões do mundo, numa grande diversidade de ambientes, o que afeta expressivamente a produtividade de grãos dos diferentes materiais genéticos existentes, originando com isso a interação genótipos por ambientes (GxA). Espera-se que essa interação assuma papel fundamental na manifestação fenotípica, devendo ser estimada e considerada na indicação de cultivares no programa de melhoramento genético (PRADO et al, 2001;BURATT et al, 2007;COLOMBARI FILHO et al, 2013).…”