Abstract
The objective of this research was to find a useful genetic information for yield characteristics of tillering maize hybrids. Fls were planted under three plant densities at the experimental field of Agricultural College of Chungnam National University. The fresh yield of P1213749//FR805/IK3, FR805/IK3//Waesungri and IK/LE/FR805/IK3 was 7,862kg/10a, 8,290kg/10a and 7,746kg/10a, respectively. The fresh yield of tillering maize hybrids was higher than that of P3394 hybrids. The dry matter yield of P3394 hybrid was 1,430kg/10a with low plant density(4,800p1an1s) and that of PI213749//FR805/IK3 was 1,834kg/10a, the dry weight of FR805/IK3//Waesungri was 1,836kg/10a and that of IK/LE/FR805/IK3 was 1,810kg/10a. Grain yields per 10a of IK/LE//FR805/IK3(783kg) was the highest in 4,800plants/10a, and that of check hybrid was higher than the tillering maize hybrids in 3,600plants/10a, but grain yield per 10a of IK/LE/FR805/IK3 was 752kg, and that of P1213749/Dangjin//IK/LE(699kg) was higher than P3394 hybrid(680kg) with 2,400plants/10a.
분얼형 옥수수인 4개 교잡종과 대조구인 P3394 교잡종과의 수량특성을 비교한 결과는 다음과 같다. 1. 생초수량에 대하여 재식밀도별로 알아보면 4,800주/10a에서는 PI213749//FR805/IK3 교잡종이 7,862kg이고, FR805/IK3//Waesungri 교잡종이 8,290kg/10이며, IK/LE//FR805/IK3 교잡종이 7,746kg/10a로서 대조구인 P3394의 6,247kg/10a보다도 많았다. 2. 건물수량은 대조구인 P3394 교잡종이 4,800주/10a에서 1,430kg로 다른 분얼형 옥수수 교잡종인 PI213749//FR805/IK3은 1,834kg/10a FR805/IK3//Waesungri 교잡종이 1,836kg/10a, IK/LE//FR805/IK3 교잡종이 1,810kg/10a로 많았다. 3. 종실수량은 4,800주/10a에서 IK/LE//FR805/IK3 교잡종이 783kg로 대조구인 P3394의 776kg/10a 보다 많았으며, 3,600주/10a에서는 대조구에서 714kg/10a로 다른 분얼형 옥수수 교잡종보다 종실수량이 많았다. 그러나 2,400주/10a에서는 오히려 분얼형 옥수수 교잡종인 IK/LE//FR805/IK3 교잡종이 752kg/10a이고, PI213749/Dangjin//FR805/IK3 교잡종이 699kg/10a로서 대조구인 P3394의 680kg/10a 보다 높았다.
