中国农业科学

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野生甜瓜‘云甜-930’抗白粉病主基因+多基因遗传分析

咸丰;张勇;马建祥;张显;杨建强   

  1. 西北农林科技大学园艺学院,陕西杨凌 712100
  • 收稿日期:2010-07-09 出版日期:2011-04-02 发布日期:2010-11-19
  • 通讯作者: 张显,E-mail:zhangxian098@126.com
  • 作者简介:咸丰,Tel:13772012639;E-mail:kevinxf@126.com
  • 基金资助:
    “十一五”国家科技支撑计划项目(2006BAD01A7-6-07)、国家“西甜瓜产业技术体系西北旱作栽培岗位科学家”项目(nycytx-36-01 -02-06)、陕西省科技研究发展计划项目(2007K01-07-04)、西北农林科技大学唐仲英育种基金项目

Genetic Analysis of Resistant to Powdery Mildew with Mixed Model of Major Gene Plus Polygene in Wild Melon Material ‘Yuntian-930’

XIAN Feng; ZHANG Yong; MA Jian-xiang; ZHANG Xian; YANG Jian-qiang   

  1. College of Horticulture, Northwest Agriculture and Forestry University, Yangling712100, Shaanxi
  • Received:2010-07-09 Online:2011-04-02 Published:2010-11-19

摘要: 【目的】研究野生甜瓜‘云甜-930’对白粉病的抗性遗传规律,以充分合理利用抗源,为抗病基因的选择及甜瓜抗白粉病育种提供依据。【方法】采用植物数量性状主基因+多基因混合遗传模型多世代联合分析方法,对野生甜瓜‘云甜-930’(P1)与栽培甜瓜‘华莱士’(P2)杂交组合的P1、P2、F1、B1、B2和F26个世代群体抗白粉病特性进行分析。【结果】野生甜瓜‘云甜-930’对白粉病的抗性遗传符合两对加性-显性-上位性主基因+加性-显性-上位性多基因混合遗传模型(E-0)控制。在2008年大棚中,该组合B1、B2和F2的主基因遗传率分别为73.31%、69.15%和97.61%,多基因遗传率分别为18.83%、25.86%和0,环境方差占总表型方差的2.39%—7.86%;在2009年温室中,该组合B1、B2和F2的主基因遗传率分别为62.98%、58.58%和90.89%,多基因遗传率分别为28.93%、31.47%和3.22%,环境方差占总表型方差的5.89%—9.94%。【结论】野生甜瓜种质资源‘云甜-930’的抗白粉病遗传规律受两对加性-显性-上位性主基因+加性-显性-上位性多基因控制,同时还受到环境变异的影响。在抗白粉病育种中,F2主基因选择效率最高。

关键词: 野生甜瓜‘云甜-930&rsquo, 白粉病抗性 , P. xanthii , 生理小种 , 遗传规律

Abstract: 【Objective】 The inheritance law of powdery mildew resistance in wild melon material ‘Yuntian-930’ was studied for utilizing this resistance material and providing a theoretical basis for selecting resistance gene in melon breeding. 【Method】 Six populations (P1, P2, F1, B1, B2 and F2) derived from the cross of ‘Yuntian-930’× ‘Hualaishi’ with the highest resistant germplasm ‘Yuntian-930’ and the highest susceptible germplasm ‘Hualaishi’ were used to study the inheritance of powdery mildew resistance by the mixed major-gene plus polygene inheritance mode with joint analysis method of multiple generations. 【Result】The result showed that the inheritance of powdery mildew resistance of wild melon‘Yuntian-930’fitted two pairs of additive-dominance-epitasis major genes plus additive-dominant-epitasis polygene model (E-0 model). In 2008, the major genes heritability of B1, B2 and F2 were estimated to be 73.31%, 69.15% and 97.61%, respectively, the polygene heritability to be 18.83%, 25.86% and 0, and the ratios of the environmental variance to phenotype variance were 2.39%-7.86% in the plastic greenhouse. In 2009, the major genes heritability of B1, B2 and F2 were estimated to be 62.98%, 58.58% and 90.89% respectively, the polygene heritability to be 28.93%, 31.47% and 3.22%, and the ratios of the environmental variance to phenotype variance were 5.89%-9.94% in the greenhouse. 【Conclusion】 The powdery mildew resistance of wild melon ‘Yuntian-930’ was controlled by two pairs of additive-dominance-epitasis major genes plus additive-dominant-epitasis polygene, and also affected by environment. In the resistance breeding program, the selection efficiency to major gene of the F2 is the highest.

Key words: wild melon ‘Yuntian-930&rsquo, powdery mildew resistance , P. xanthii , race , inheritance