SC2053在川西化杀杂种小麦组合筛选中的应用初报

报道了我所利用SC2 0 53在杂种小麦研究中的应用情况。研究认为 :①多数小麦品种在剂量为 0 .6kg/hm2 ,雌雄蕊原基形成期至药隔期喷施 ,杀雄率能达 95%以上。药隔期为喷施临界期。品种、喷药剂量与喷药时期存在互作。②气候条件的改变对不同小麦品种生育进程的影响有差异。在杂交小麦制种中应对此加强研究 ,以利于花期调节。③在配制组合时 ,应特别注意抗性材料的选用。④超标优势明显的化杀杂种小麦 ,其优势主要表现在穗部性状上 ,尤其是穗粒数优势

Application of SC2053 in Cross Selection of CHA Hybrid Wheat in West Sichuan

This paper reported the application of SC2053 in CHA hybrid wheat.The results showed that(1) more than 95% of stamens for most wheat varieties lost fertility by spraying SC2053 at the rate of 0.6 kg/hm 2 from formation stage of pistil and stamen to formation stage of anther separation,and the formation of anther separation was the critical period for spraying;(2)the change of climate had different effects on the developmental stage of different varieties,which should be further studied in hybrid wheat seed production ;(3) varieties with high resistance to stripe rust should be paid more attention in cross selection;(4) the crosses with high heterosis(over check >10%) had chiefly more grains per spike.