几个水稻不育系的亲和性及配合力、遗传力研究

The Research of the Compatibility, Combining Ability and Heritability of Some Rice Sterile Lines

粳型不育系Ｙ４０３６Ａ及恢复系０５７、０４０、Ｃ堡均属Ｉ类。株高、千粒重、播始历期３个性状以加性效性为主。广义遗传力、狭义遗传力均较低，其中千粒重、播始历期的狭义遗传力高于７０％ ，其余均不到６０％ 。４个不育系中培矮６４Ｓ亲和性较好，Ｙ４０３６Ａ为部分亲和。亚种间杂交仍存在结实率偏低等不足，可通过选择亲本或导入广亲和基因来克服。

Among the sterile and restore lines, Y4036A and 057 belonged to I type. The additive effect of the three traits such as the plant height were higher. Both wide and narrow heritability were lower. Among them, the narrow heritability of the wight of 1000-grains and the period from sowing to heading were more than 70%, the others were less than 60%. Among the four sterile lines, the wide compatibility of Peiai 64s was better, Y4036A was lower. The shortages such as lower rate of seed setting were also exist. But they can be resolved by the gain of wide compatibility transfer and the parents selection.