不同种植方式对光温敏雄性不育小麦育性表达的影响

光温敏雄性不育小麦育性的稳定表达是实现其成功利用的关键。研究了不同种植方式对2个光温敏雄性不育小麦育性表达的影响。结果表明,随播种时期的推迟、播种密度的降低、行间距的增加,自交结实率呈升高趋势。方差分析表明,播种时期对自交结实的影响最大,播种时期与播种密度、播种行间距间均存在显著的互作。年度间、株间、株内穗间、穗内小穗间、小穗内小花间均存在自交结实的差异,其中不同蘖位间自交结实粒数由多到少的顺序为主茎>第1分蘖>第2分蘖>第3分蘖,第5~10小穗自交结实多于其他部位。光温敏雄性不育小麦BS366的育性可表现出由0%~70%的连续变化,而BS210的育性则在11%~42%。

Effect of the Different Planting Modes on the Fertility Expression in Photo-Thenno-Sensitive Male Sterile Wheat

The effect of different planting modes on fertility expression in photo-thermo-sensitive male sterile wheat was analyzed in the paper.The results showed the self-setting rate was gradually increased with the sowing time(SW) delaying,the planting density(PD) decreasing and row space(RS) increasing.The variance analysis indicated that the sowing time had the strongest influence on fertility expression,and the SW×PD or SW×RS effect was significant(P>0.01).The differences in fertility between different years,plants,tillers and florets were existent.In different tiller position,self-crossed seed fertility was decreased orderly: main tiller>first tiller>second tiller>third tiller.The grain number of seed-setting from the fifth to tenth spikes was more than other spikes.The scope of self-crossed seed-setting rate in BS366 and BS210 was 0%～70% and 11%～42% respectively.