Sowing time and physiological potential of bean seeds of different growth types

Abstract

This work was carried out in order to evaluate the physiological quality of common bean seeds of different types of growth, according to the sowing seasons. The treatments were arranged in 2 x 4 factorial scheme, involving two sowing seasons (dry and winter) and four genotypes (Ouro Vermelho, Ouro Negro, BRSMG Madrepérola e Manteigão Vermelho), in randomized blocks design . The seeds were initially evaluated as for water content, thousand seeds weight and physiological potential by the germination and vigor tests (first germination count, plantlets emergence in sand, emergence speed Index and electrical conductivity). The seeds of the prostrate genotypes, with type of growth III (Ouro Negro and BRSMG Madrepérola) or semi-prostate with type of growth II/III (Ouro Vermelho) present better physiological potential, regardless of the sowing season. In the crop of Summer/autumn, the sowing of bean is more suitable for producing seeds with high physiological quality in the conditions of cultivation of the north of Minas Gerais.