光温条件对光温敏核不育小麦ES-8不育基因表达的影响

采用分期播种试验方法,研究了光温条件对光温敏核不育小麦ES8不育基因表达的影响。结果表明,光温条件的变化影响不育基因的表达,在长沙地区,ES8在9月5日至10月15日播种,花粉败育率达100%,不育株率达100%.在12月5日至12月15日播种,其自交结实率为71.6～72.7%,在10月25日至11月25日播种,表现为部分可育和部分不育。ES8存在两个育性转换的临界期,10月25日播期为不育变为半不育的育性转换临界期,12月5日为部分可育变为完全可育的育性转换临界期。育性转换的临界日长约小于11.50h.

Impact of photoperiod-temperature conditions on male-sterile gene expression of photoperiod-temperature sensitive genic male-sterile wheat line ES-8

Through changing sowing date, the impact of photoperiod-temperature conditions on the male-sterile gene expression of photoperiod-temperature sensitive genic male-sterile wheat line ES-8 was studied. The results show that in Changsha, when ES-8 was sowed from September 5 to October 15, the percentage of its pollen abortion and that of sterile plants were all 100%. When sowed from December 5 to December 15, its self seeding rate ranged in 71.6～72.7%, while from October 25 to November 25, it showed partly sterile and partly fertile. ES-8 had two critical dates of fertility alteration, one on October 25, from sterile to semi-sterile, and another on December 5, from partly fertile to completely fertile. The critical day-length of fertility alteration was less than 11.5 hours.