播期对温敏不育系BNY育性的影响

Effects of Sowing Stages on the Fertility Alteration of Thermo-sensitive Male Sterile Line-BNY in Wheat

通过分期播种的方法对温敏不育系小麦BNY和温麦6号(CK)的育性进行系统观察和研究,结果表明BNY的育性显著的低于CK,BNY在不同蘖位、花位上育性存在显著差异,表现出小分蘖<大分蘖<主茎,下位花<上位花,而穗位间育性差异不显著;播期对温敏不育系BNY育性有显著的影响,表现出早播败育率高,随播期延迟育性有明显恢复的趋势。

The fertility of the thermo-sensitive male sterile line-BNY wheat and wenmai 6 (ck) were studied by sowing in different stages. The results showed that the BNY's fertility is obviously lower than CK, and the fertility vary obviously in different tiller and floret positions of the thermo-sensitive male sterile line-BNY. Namely,the small tiller<big tiller<main stem , the basal floret<the upper floret,but there are no differences in the different spikelet positions of the same spike .Sowing stages had obvious effects on the fertility of thermo-sensitive male sterile line-BNY. Its fertility can be recovered obviously gradually with sowing time from Oct 3 to Nev 7.