摘要
自1979年起,逐步形成了一套包括抗源搜集、筛选、分析、遗传研究和转育等5个步骤的抗源搜集、研究和应用体系。目的在于寻求尽可能多的,不同于1BL/1RS所含有的Yr9,Lr26和Pm8的,多样化的第二线抗源,并将它们转育到较好的遗传背景中去。至目前为止,已找到33个不同于上述基因的二线抗源,并用其中一些育成了62个农艺性状大为改善的抗病种质,已先后分发给兄弟单位应用。它们的进一步应用将会使我国小麦对这些病害的抗性更为持久,产量更为稳定。
A 5-step system, including the collection, screening, analysis, inheritance studies and transfer of/for resistance against stripe rust, leaf rust and powdery mildew in China, was elaborated gradually since 1979 with the purpose to identify as much, and as diverse, sources of resistance against these diseases as kossible. and to make them readily available to the Chinese wheat breeders who relied too much on the 1BL/1RS resistance genes, i. e. . Yr9. Lr26 and Pm8, for the last 20 years. So far. 33 different sources of resistance against one of these diseases have been identified. And 62 lines with some of these resistance in better agronomic background have been developed and released to fellow breeders. It is hoped that the utilization of these diversified 2nd line resistance might lead to more durable resistance and, consequently, more stable yield.
出处
《作物学报》
CAS
CSCD
北大核心
1994年第4期385-394,共10页
Acta Agronomica Sinica
基金
国家科技攻关
国家自然科学基金
北京市重大科技项目资助课题
关键词
小麦
条锦病
叶锈病
抗性育种
Wheat, Stripe rust. Leaf rust, Powdery mildew. Second-line resistance
