https://www.ahs.ac.cn/images/0513-353X/images/top-banner1.jpg|#|苹果
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https://www.ahs.ac.cn/images/0513-353X/images/top-banner6.jpg|#|黄瓜
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园艺学报 ›› 2005, Vol. 32 ›› Issue (5): 899-901.

• 研究报告 • 上一篇    下一篇

黄瓜白粉病抗性遗传机制的研究

张素勤1, 2;顾兴芳2;张圣平2;邹志荣1
  

  1. (1 西北农林科技大学园艺学院, 杨凌712100; 2 中国农业科学院蔬菜花卉研究所, 北京100081)
  • 收稿日期:2004-12-08 修回日期:2005-04-13 出版日期:2005-10-25 发布日期:2005-10-25

The Genetic Mechanism of Resistance to Powdery Mildew in Cucumber

Zhang Suqin1, 2;Gu Xingfang2;Zhang Shengping2;Zou Zhirong1   

  1. (1College of Horticulture, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China; 2 Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China)
  • Received:2004-12-08 Revised:2005-04-13 Online:2005-10-25 Published:2005-10-25

摘要: 采用多世代联合分析方法, 通过3个抗感杂交组合研究了黄瓜白粉病抗性的遗传规律。结果表明, 3个组合的最适遗传模型皆是两对加性- 显性- 上位性主基因+加性- 显性- 上位性多基因模型
(E2120模型) 。组合Ⅰ的主基因遗传率为64.26% ~95.47% , 两对主基因感病相对抗病为部分显性, 两主基因的加性效应及第二主基因的显性效应较大, 两主基因的加性×显性互作效应也较大。组合Ⅱ和组合Ⅲ两主基因的遗传率分别为95.35%和96.04% , 两主基因的加性效应、显性效应和显性度较为相近。

关键词: 黄瓜, 白粉病, 抗性, 遗传机制

Abstract: The cucumber powdery mildew resistance was studied with joint analysis of multip le generations. The best fitted model of three resistant suscep tible crosses was two major genes plus polygenes mixed inheritance model ( E2120 model) without excep tion. In cross I, heritabilities ofmajor geneswere 64.26% -95.47%. Formajor genes, susceptibilitywas the dominant partly. The additive effects of the two major genes and the dominant effect of the second major gene were higher. The ep istatic effect of additive ×dominant of two major genes was higher too. The heritabilities ofmajor genes in the crossⅡ and cross Ⅲ were 96.04% and 95.35% , respectively. The additive effect, dominant effect and dominance degree of two major genes were similar in this two crosses.

Key words: Cucumber, Powdery mildew, Resistance, Inheritance

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