滇型杂交水稻亲本与杂交后代的性状遗传相关分析

Analysis of the Genetic Correlation of Traits between the Parents and F_1 in Dian-type Hybrid Rice

选用7种不同细胞质源滇型不育系与滇一型保持系及恢复系各5个材料进行杂交,对70个杂交组合的剑叶穗颈夹角、剑叶长宽比、株高、穗长及穗总粒数这5个性状进行分析。试验结果表明,滇型杂交水稻在剑叶长宽比、株高、穗长及穗总粒数等性状的表现主要受不育系母本的影响,在组配滇型杂交稻时考虑不育系多项农艺性状的表现显得尤为重要。

70 hybrids were gotten by cross between 7 Dian-type sterile lines with different cytoplasms and 10 strains selected as female and male parents respectively. In 10 male parents, 5 strains are the maintainer lines and other 5 strains are the restorer lines used in Dian-1-type. These hybrid combinations were analyzed about angel between sword leaf and panicle, ratio of length and breadth of sword leaf, plant height, panicle length and the grain number of panicle. The result is that ratio of length and breadth of sword leaf, plant height, panicle length and the grain number of panicle are controlled by the female parents in Dian-type hybrid rice. It is very important to think of agronomic traits of sterile lines in the Diantype hybrid rice breeding programs.