关键词: 谷子;新不育系;恢复系;配合力;遗传力

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