Heterosis and combining ability for yield and maturity involving exotic and indigenous inbred lines of maize (Zea mays L.)

摘要

Exploitation of hybrid vigour is considered an outstanding accomplishment of plant breeding. The magnitude of heterosis shown by hybrids depends largely on the heterotic pattern and genetic divergence between parental inbred lines. Development of single cross hybrid of maize depends on the per se performance of inbreds and their combining ability for important characters. The information about the heterotic patterns and combining ability of parents and crosses both facilitate the breeders in the selection and development of single cross hybrids. Essentialities of diversity between two parents have been considered important for releasing high heterosis. Taking diversity into consideration the exotic and indigenous lines were involved in the present investigation to estimate the magnitude and direction of heterosis and combining ability in maize.