采用NCⅡ不完全双列杂交设计，以4个玉米自交系作为父本、5个玉米自交系作为母本组配成20个杂交组合，对其发芽势、发芽率、发芽指数、活力指数进行了测定。结果表明，组合P5×P8、P4×P9、P2×P7种子活力和配合力好，可进一步鉴定；组合P3×P8、P3×P7、P4×P6、P2×P8种子活力及配合力相对较好，需进一步考察。

There are 20 corn’s hybrids， and those are 4 inbred lines as females and 5 inbred lines as males. The design is according to NCⅡ incomplete diallel cross. The experiment determinate germination potential， germination percentage， germination index and vigor index. The results showed that the seed vigor and combining ability is best of the combinations P5×P8， P4×P9， P2×P7； the combinations P3×P8， P3×P7， P4×P6， P2×P8 are batter， and we must do experiment further.

S330.2

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