옥수수 登熟期間과 登熟 速度의 組合能力

Combining ability of duration and rate of grain filling in corn

This study was carried out to estimate the combining abilities of duration and rate of grain filling in eight-parental diallel cross in corn. Highly significant general(GCA) and specific combining abilities(SCA) were obtained for grain filling period and rate. The magnitude of variance for GCA was much larger than that for suggesting that additive gene effects were greater than non-additive gene effects. Inbred line, FR25 seemed to be effective in extending the days of lag period, effective grain filling duration and the black layer appearance, while YUBC208 appeared to shortening the days of grain filling duration. Inbred, KI16A increased the rate of grain filling, while A508 decreased the rate of grain filling. FR2A/YUBC208, KS42/A508 and YUBC 208/A662 showed high SCA for extending grain filling period during lag period, while FR25/FR2A and KI16-A/KS42 were effective in shortening the grain filling period. During the effective grain filling period, FR2A/FR14A extended the grain filling period, but FR25/A508 shortened the grain filling period. FR2A/A662 and KS42/YUBC208 were effective in speeding up the rate of grain filling, while FR25/FR2A was effective in slowing down the rate of grain filling.