Produtividade e estabilidade de linhagens-elite de feijoeiro-comum dos principais grupos comerciais no Brasil, em diferentes ambientes de Minas Gerais: ciclo VCU MG 2010/2012

Abstract

This study aimed to identify breeding lines of business class "carioca", "special grain" and "black" with higher productivity, adaptability and yield stability in different environments of Minas Gerais, in order to possible recommendation of new common bean cultivars, especially for the Northern region. The assays were installed in Sete Lagoas, Uberlândia, Janaúba and Jaíba in Minas Gerais state, in the spring-summer (water), summer-autumn (dry) and autumn-winter (winter) crops. Each combination of local and planting time was considered a cultivation environment. The experiments were composed of 25 lines of carioca commercial class, 16 of special grains and 16 of 'black' bean, independently assessed. The design was a randomized complete block design with three replications. Besides the grain yield, the production components were evaluated. The data were submitted to individual and combined analysis of variance and compared by Scott-Knott test at 5% significance level. The productivity data were submitted to analysis of adaptability and stability by means of Annicchiarico method, studying the results both jointly and individually (local and crop growing period). When we considered all environments, the lines MAIV-18.259, of the carioca commercial class, CNFRx 15275 of the special grains, and CNFP 10103 and CNFP 10793 of the black commercial class were the most productive, adaptable and stable. Materials with the best performance in the North of Minas Gerais were MAIV-18.259, MAIV-15.204, RCII-2.19, VC-20, EMB-4, VC-22, VC-23, VC-19, VC-18, CVIII-2, CNFC 10408 and Perola, of the carioca; CNFJ 15288, CNFRx 15275, Jalo EEP and BRS Radiante, of the special grain class; and CNFP 10793, CNFP 10103, VP-26 and BRS Campeiro, of the black class. These lines have the potential to be released as commercial cultivars.