Relationship between nil, auto- and allo-competition and their implications in cowpea breeding.

摘要

Three cowpea (Vigna unguiculata) cultivars differing in growth habit, maturity duration and yielding ability (IT82D-716, IT82E-18 and IT84E-124) were evaluated under conditions of nil-, auto- and allo-competition for 4 growing seasons (summer and rainy seasons of 1987 and 1988). Correlation coefficients were estimated for grain yield under different competition situations. The results showed that IT82D-716 is a low yielder with high competitive ability, while the other cultivars were high yieldingwith poor competitive ability. There was a negative correlation between yielding and competitive ability.