矮杆大穗高产小麦育种亲本SW3243重要农艺性状特性及育种应用效果（摘要）

目的]研究小麦亲本材料SW3243（组合为1426/4/IR68-77/YAA//ALD‘S’/3/YAZ//ST2022/983）的育种利用价值。方法]对SW3243的选育、农艺特性、部分品质相关遗传性状、1BL/1RS易位系及育种的应用情况进行了分析。结果]SW3243具有如下特点：SW3243高抗条中29、30,对抗性基因不具有抑制作用;具有矮杆、多花、大穗、高产、迟播早熟等显著特点;SW3243的高分子量谷蛋白亚基（HMW-GS）组成为1,7＋8,2＋12,含有232bp片段的PPO等位基因,Waxy蛋白亚基没有缺失,籽粒含有少量迟熟α-淀粉酶;SW3243含1BL/1RS易位系,但与供试易位系具有明显不同;利用SW3243的优良农艺特性育成了一批高产新品系,其中有42个衍生系参加了国家和四川省区试,育成国家、省级审定小麦新品种10个（次）;SW3243及其衍生品种已累计推广433万hm2以上。结论]麦材料SW3243具有优良的农艺性状,是四川小麦育种的重要亲本,研究结果将为小麦种质资源创新和高产育种提供信息参考。

Agronomic Traits and Utilization of Large-Spike and High-Yield Dwarf Wheat Breeding Parent SW3243

Objective] The study aimed to investigate the utilization value of parent material SW3243 in wheat breeding,and its pedigree was 1426/4/IR68-77/YAA//ALD’S’/3/YAZ//ST2022/983.Method] The selection,agronomic traits,some quality-related genetic traits,and the application of 1BL/1RS translocation line in breeding were analyzed.Result] SW3243 had the following characteristics:the SW3243 was high resistant to stripe rust race CYR29 and CYR30,and did not suppress the performance of resistant genes;SW3243 showed lots of advantages such as dwarf,more spike lets,large spike,high yield potential and early maturity even in late planting;the high molecular weight glutenin subunit(HMW-GS)of SW3243 was composed in the form of 1,7 +8,2 +12,containing 232 bp fragment of PPO allele;Waxy protein subunit was not lost;its grain contains a small amount late maturing α-amylase;SW3243 contained 1BL/1RS translocation line,but it was significantly different from the tested translocation lines;a large number of new lines had been developed from SW3243 in Sichuan,among them,42 derived lines attended provincial and national yield trial respectively,and seven varieties were released in Sichuan Province and three were released in national level;the planting area of SW3243 and its derived varieties were totally extended to 4.33 million hm2 in Sichuan.Conclusion] The wheat variety SW3243,which had excellent agronomic traits,was the important parent material for wheat breeding in Sichuan.The research will provide reference for the innovation in germplasm resources and high-yield breeding of wheat.