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作物学报 ›› 2008, Vol. 34 ›› Issue (08): 1317-1322.doi: 10.3724/SP.J.1006.2008.01317

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

鲁麦21慢白粉病抗性基因数目和遗传力分析

倪小文1;阎俊2;陈新民1,*;夏先春1;何中虎1;张勇1;王德森1;Morten Lillemo3   

  1. 1 中国农业科学院作物科学研究所国家小麦改良中心 / 国家农作物基因资源与基因改良重大科学工程, 北京100081; 2 中国农业科学院棉花研究所, 河南安阳455000; 3 Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, 5003, Ås, Norway
  • 收稿日期:2008-02-02 修回日期:1900-01-01 出版日期:2008-08-12 网络出版日期:2008-08-12
  • 通讯作者: 陈新民

Heritability and Number of Genes Controlling Slow-Mildewing Resis-tance in Wheat Cultivar Lumai 21

NI Xiao-Wen1,YAN Jun2,CHEN Xin-Min1*,XIA Xian-Chun1,HE Zhong-Hu1,ZHANG Yong1,WANG De-Sen1,Morten Lillemo3   

  1. 1 National Wheat Improvement Center / National Key Facility for Crop Gene Resource and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081; 2 Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, Henan, China; 3 Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, 5003, Ås, Norway
  • Received:2008-02-02 Revised:1900-01-01 Published:2008-08-12 Published online:2008-08-12
  • Contact: CHEN Xin-Min

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摘要： 以多年鉴定具有慢白粉抗性的小麦品种鲁麦21和感白粉病品种京双16及其杂交组合F2:3和F2:4代株系200个为材料, 于2005—2007年连续2个生长季, 在北京和安阳两地分别进行田间病害鉴定, 并采用质量性状和数量性状2种分析方法估算鲁麦21的慢病基因数目和遗传力。结果表明, 在这2个群体中至少存在4对抗性基因, 其广义遗传力为0.53~0.78。由于出现超亲分离, 因此推测京双16可能贡献1对微效抗病基因, 而鲁麦21至少含有3对慢白粉病抗性基因。

关键词: 鲁麦21, 白粉病慢抗性, 抗病基因数目, 遗传力

Abstract: It is very important to apply slow-mildewing resistance in wheat (Triticum aestivum L.) breeding, because slow-mildewing resistance is more durable than hypersensitive resistance. However, little information is available about the genetics of slow-mildewing resistance in Chinese wheat cultivars. Lumai 21 is identified as a slow-mildewing resistant wheat cultivar. To estimate the number of genes and its heritability, 200 lines of F2:3 and F2:4 populations derived from the cross between Lumai 21 and Jingshuang 16 (susceptible to mildew) and their parents were planted at Beijing and Anyang, Henan for disease evaluation in 2005–2007 growing seasons. The resistance was analyzed on the bases of both quantitative and qualitative genetic models. At least 4 resistance genes were detected in the 2 populations. The broad-sense heritability of the resistance was 0.53–0.78. Transgressive segregation result indicated that Jingshuang 16 might hold 1 minor gene for the resistance, and Lumai 21 involves at least 3 genes, accordingly.

Key words: Lumai 21, Adult-plant resistance to powdery mildew, Number of resistance genes, Heritability

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