Adaptability and phenotypical stability of black bean cultivars in Espírito Santo state, Brazil

Abstract

Grain yield of eleven black bean cultivars tested in Espírito Santo State, Brazil, under fifteen varied environments, between 1981 and 1983, showed different environmental means from 1.050 to 2.717 kg/ha. The cultivars majority presented a good and similar response to environmental stimulus. The most productives were 'BAT 304', 'Iguaçu', 'Preto 60 dias' and 'BAT 179', around 27%, 12%, 12% and 11% superior to the pattern, 'Rio Tibagi' (1.280 kg/ha), respectively. Just 'BAT 304' had general adaptability, while the others, also higher, seemed to adjust greater adaptability to better environments; '8017.1.1' similar genotypes would be unadapted over all environments; Greater yield stability was got with 'BAT 304' and 'Iguaçu', while the most unstable were 'ICA Huasano' and '8017.1.1 ,. In farming proofs, 'BAT 179', 'BAT 304', and Iguaçu', the best commercially for the Espírito Santo, produced from 1.600 to 2.400 kg/ha, in 1983 dry season favourable conditions. They were released as new cultivars, officialy named 'Capixaba Precoce' ('BAT 3O4') and 'Vitória ('BAT 179'), whereas 'Iguaçu' was recommended with the original name, in September, 1983.