籽用南瓜主要经济性状配合力分析

6个籽用南瓜自交系按双列杂交设计配制36个组合,对单瓜质量、瓜横径、瓜纵径、籽粒宽、籽粒长、单瓜籽粒数、百粒重、单瓜产籽量等8个主要经济性状的配合力进行了研究。通过对遗传参数的估计,单瓜质量、瓜纵径、单瓜籽粒数、单瓜产籽量等4个性状遗传型间的差异主要取决于基因的非加性效应,利用这些效应最可靠的方法就是通过优势育种途径;籽粒长、瓜横径、百粒重、籽粒宽等4个性状主要受基因的加性效应控制,能够较稳定地遗传,可以在早代亲本选配时选择这些性状。

Combining Ability of Economic Characters in Seed Pumpkin(Cucurbita maxima Duch.)

36 crosses were made in diallel cross design by using 6 inbred lines of seed pumpkin. Combining ability of individual fruit weight ,fruit length ,fruit diameter, seed length ,seed width, seed amount per fruit, 100 seeds weight and seed yield per fruit were investigated. And several genetic parameters of 8 characters mention above were estimated, the results showed that heredity of fruit weight,fruit length,seed amount per fruit and seed yield per fruit were affected mostly by nonadditive effect, heterosis breeding is an effective pathway for these 4 characters. On the contrary, additive effect was dominant for the other 4 characters and can be chosen in early generation.