同源姊妹种与其双亲的配合力测定

Combining ability analyses on sib-cross and its parents in corn

被测的两个同源自交系和相配的两个姊妹种．系与系之间、系与姊妹种之间、姊妹种之间（正反交）产量差异都不显著、而产量之间的差异主要是由于测验种之间的差异造成的。配合力测定结果．两个同源自交系和两个姊妹种中,系与系之间,系与姊妹种之间,两个姊妹种之间一般配合力差异不显著，说明利用配合力差异不显著的姊妹种替代自交系是可以作为杂交亲本生产种子的。

the analysis of yieltls belween two lines from same parent and two sib-crosses showed no significant in sibcrosses (reciprocal cross ). as well as in sib -lines and between sib -cross and sib - line. the difference in yields was caused by the difference of tester. the results of combining ability analyses was showed that the general combining ability was no significant in the two lines、the two sib - crosses、 between line and sib - cross, but the GCA of testers was significant.