摘要 小麦冬春杂交后代SW3243是四川的重要亲本及推广品种，组合为1426/4/IR68-77/YAA//ALD‘S’/3/YAZ//ST2022/983。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。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，育成小麦新品种7个，审定10次（四川省审定7次，国家审定3次）；SW3243及其衍生品种已累计推广433万公顷以上，对四川的小麦育种及生产做出了重要贡献。本文旨在对SW3243 的选育及重要农艺性状和育种应用作一总结，为进一步的小麦种质资源创新和高产育种提供信息。

Abstract: The S×W pattern developed common wheat line SW3243 was one of important parents in Sichuan, its pedigree was 1426/4/IR68-77/YAA//ALD‘S’/3/ YAZ//ST2022/983. SW3243 was high resistance to stripe rust race CYR29 and CYR30, and did not suppress the performance of resistant genes when crossed with other resistant materials. SW3243 contained characteristics of dwarf, more spikelets, large spike, high yield potential and early maturity even in late planting. Lots of new lines had been developed from SW3243 in Sichuan, among them 42 derived lines were attended province and national yield trial respectively, and 7 varieties were released in Sichuan province and 3 were released in national level. The plant area of SW3243 and its derived varieties were totally extended to 4.33 million hectare in Sichuan.