除雄時 葉損失 및 花粉親 除去時期가 옥수수 交雜種의 採種量에 치는 影響

Effects of Leaf Damage at Detasseling and Removal Time of Pollen Parent on the Hybrid Seed Yield in Corn

Two field experiments were conducted to study the effects of leaf damage at detasseling and removal time of pollen parent on hybrid seed yield in solid planted corn seed production field. Corn. inbreds KS 5 (seed paent) and KS6 (pollen parent) were planted in a solid planting pattern at Crop Experiment Station, Suweon. Top 1,2 and 3 leaves of seed parent were removed at detasseling, respectively, in 1978 and pollen parent was removed 5 times with 5 day interval begining 5 days after silking of seed parent in 1979. Leaf damage up to top 2 leaves showed no significant effects en seed yield and seed size. However, the results indicated the possible detrimental effect of leaf damage more than 3 top leaves on seed yield. Ear Length, ear diameter and 100 kernel weight appeared to be decreased as removal of pollen parent was delayed. Regression analysis shoved that 2.2 ㎏ of seed yield per l0a were decreased as pollen parent removal was delayed 1 day by 25 days ofter silking.