Genetic potential of black bean genotypes with predictable behaviors in multienvironment trials

Abstract

ABSTRACT. The aim of this study was to evaluate the phenotypic stability and specific and broad adaptability of common black bean genotypes for the Central and Center-South regions of Brazil by using the Annicchiarico and AMMI (weighted average of absolute scores: WAAS, and weighted average of absolute scores and productivity: WAASP) methodologies. We carried out 69 trials, with 43 and 26 trials in the Central and Center-South regions, respectively. Thirteen genotypes were evaluated in a randomized block design with three replications, during the rainy, dry, and winter seasons in 2 years. To obtain estimates of specific adaptation, we analyzed the parameters for each method obtained in the two geographic regions separately. To estimate broad adaptation, we used the average of the parameters obtained from each region. The lines identified with high specific adaptation in each region were not the same based on the Annicchiarico and AMMI (WAAS) methodologies. It was not possible to identify the same genotypes with 2 P.P. Torga et al.Genetics and Molecular Research 15 (4): gmr15049029 specific or broad stability by using these methods. By contrast, the Annicchiarico and AMMI (WAASP) methods presented very similar estimates of broad and specific adaptation. Based on these methods, the lines with more specific adaptation were CNFP 8000 and CNFP 7994, in the Central and Center-South regions, respectively, of which the CNFP 8000 line was more widely adapted.

Adaptability and stability of common bean genotypes in family farming systems

“…When associating stability with productivity, the most promising lines for the evaluated conditions, using the WAASP, were CNFC 10729, CNFC 10753, and CNFRX 10241 (Table 3). This strategy was also adopted by Torga et al (2016) and Pontes Júnior et al (2016) to mitigate the problem of more stable lines or cultivars not being among the genotypes with higher yield.…”

“…The adaptability and stability parameters of the lines were estimated by the methods of: Lin & Binns (1988) modified by Oliveira et al (2006); Cruz et al (1989); the additive main effects and multiplicative interaction (AMMI) model (Duarte & Vencovsky, 1999) with adaptations for the calculation of the weighted average of absolute scores (WAAS) (Pereira et al, 2009a) and of the weighted average of absolute scores and productivity (WAASP) (Torga et al, 2016); and genotype main effect plus genotype-by-environment interaction (GGE) biplot graphical analysis (Yan, 2002;Yan & Tinker, 2005). The genotypes were ranked by the WAAS values, and the lowest was considered the (Pereira et al, 2009a).…”

“…The genotypes were ranked by the WAAS values, and the lowest was considered the (Pereira et al, 2009a). A weight equal to three and to two was used for WAASP and WAAS, respectively (Pontes Júnior et al, 2016;Torga et al, 2016), allowing the assessment of adaptability and stability simultaneously; the yield and WAAS data were transformed to the same scale.…”

Research Article Production and disease resistance of elite black bean lines previously selected using mineral nitrogen fertilization cultivated with natural versus artificial nitrogen supplementation

“…The interaction of lines with environments (G x E) is frequently observed in the common bean crop, especially in Brazil, since it is grown across the country, using varied technology levels, and in different environments (Torga et al, 2016). Under these conditions, it is important that studies focused on SNF be performed in multiple environments, which has not been the case in previous studies.…”