C. A. Rava

Adaptabilidade e estabilidade de genótipos de feijoeiro-comum com grãos tipo carioca na Região Central do Brasil

The aim of this work was to test different methods to identify carioca grain type common bean (Phaseolus vulgaris) genotypes with high adaptability and yield stability for central Brazil. Forty five production trials were carried out with 16 genotypes, in randomized complete block designs with three replications, in the states Goias, Mato Grosso, Mato Grosso do Sul, Tocantins, and the Distrito Federal, in 2003 and 2004. The grain yield data were submitted to analysis of variance and to analysis of stability and adaptability using the methods of Lin & Binns (modified by Carneiro), Annichiarico, Eberhart & Russell, Cruz et al., and AMMI. The Lin & Binns (modified by Carneiro) and Annichiaricos methods were very useful to the common beans genetic breeding program, because of their easiness of use in separating favorable and unfavorable environments and their identification of stable genotypes among the most productive ones. The cultivar BRS Estilo combined high adaptability, stability, and grain yield in central Brazil. The cultivar Perola, widely utilized in Brazil, also had good stability and adaptability in this region.

Comparação de métodos de análise de adaptabilidade e estabilidade fenotípica em feijoeiro-comum

The objective of this work was to compare methods for studying phenotypic adaptability and stability in common beans (Phaseolus vulgaris). Grain yield evaluations were carried out in 71 trials with 16 common bean genotypes, and using six methods. The association among the methods was determined by Spearman correlation. Cruz and Eberhart & Russel methods were highly correlated. Lin & Binns, Lin & Binns modified and Annicchiarico methods were also highly correlated. Intermediate correlations were observed between Eberhart & Russel and additive main effects and multiplicative interaction model (AMMI) methods. The joint utilization of highly correlated methods is not recommended. Therefore, only one of the methods among Eberhart & Russel, Cruz and AMMI should be used in association with Lin & Binns, Lin & Binns modified or Annicchiarico, since there was no correlation among methods of these two groups. Lin & Binns and Annicchiarico methods are indicated for isolated utilization, because they are simple to use and allow the classification of environments in favorable and unfavorable, and the identification of the most adapted and stable genotypes among the most productive ones.

BRS Estilo: common bean cultivar with Carioca grain, upright growth and high yield potential

BRS Estilo is a new common bean cultivar with Carioca grain, suitable for cultivation in 12 states in the five macro- regions of Brazil. With a mean yield of 2,134 kg ha-1 it exceeds the control by 6.3 %, has a high yield potential (4011okg ha-1), upright growth and is resistant to lodging and anthracnose.

BRS Esplendor Common bean cultivar with black grain, upright growth and disease resistance

BRS Esplendor is a common bean cultivar with black grain, suitable for 12 Brazilian states. The mean productivity is 2,156 kg ha-1, by 7.5 % higher than of controls, has a high yield potential (4,120 kg ha-1), upright growth, high tolerance to lodging and high resistance to anthracnose, fusarium wilt and common bacterial blight.