Abstract:

Taking Gu10A and Gu11A as sterile materials and millet varieties from different ecotope as recovery materials, this study analyzed the combining ability and heritability of these 2 novel foxtail millet sterile lines and different ecotope restorers by incomplete diallel cross method, so as to provide basis for sterile line breeding and selecting optimal combination. The results show that ① Sterile Gu10As general combining ability is higher, and restorers with higher general combining ability are K1011, Richaogu, JinGu 21, JiGu 26, Datong 28 and Jigu 24. The special combining abilities of Gu10A with Jingu 14 and Datong 28 combinations are higher; although sterile Gu11As general combining ability is low, its special combining abilities with Richaogu or Jigu 26 and K1011 combinations are higher than others. ② The heritability analysis indicates that the heritabilities of plant height, yield, thousand kernel weight, and spike length in F1 group are larger, because the environment impact is small. The selection for these traits is effective. The narrowsense heritabilities of spike weight, spike diameter, spike grain weight, thousand kernel weight and yield are lower, indicating that the dominant and epistatic effects in F1 group greatly influence these characteristics; and plant height and spike length of these 2 traits in F1 group are mainly caused by gene additive effect.

Key words: millet, novel sterile line, restorer, combining ability, heritability

摘要：

以谷10A和谷11A作为不育材料，以来自不同生态区的谷子品种作为恢复材料，采用不完全双列杂交方法分析了这两个新谷子不育系和不同生态区恢复系的配合力和遗传力，为选育不育系和选配强优组合提供依据。结果表明:①不育系谷10A的一般配合力较高，恢复系中一般配合力较高的有K1011、日朝谷、晋谷21、冀谷26、大同28、冀谷24。谷10A与锦谷14、大同28组合的特殊配合力较高；不育系谷11A的一般配合力虽然不高，但是其与日朝谷、冀谷26、K1011组合的特殊配合力较高。②遗传力分析表明：株高、产量、千粒重、穗长这些性状的遗传力在F1群体中较高，受环境影响较小，对这些性状进行选择是有效的；单穗重、穗直径、穗粒重、千粒重、产量的狭义遗传力较低，说明显性效应和上位性效应在F1群体中对这些性状有很大影响；而株高和穗长这两个性状在F1群体中主要是基因累加效应贡献大。

关键词: 谷子;新不育系;恢复系;配合力;遗传力