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作物学报 ›› 2008, Vol. 34 ›› Issue (10): 1728-1733.doi: 10.3724/SP.J.1006.2008.01728

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

水稻稻曲病抗性的主基因+多基因混合遗传模型分析

李余生;朱镇;张亚东;赵凌;王才林*   

  1. 江苏省农业科学院粮食作物研究所 / 江苏省优质水稻工程技术研究中心, 江苏南京210014
  • 收稿日期:2008-02-18 修回日期:1900-01-01 出版日期:2008-10-12 发布日期:2008-10-12
  • 通讯作者: 王才林

Genetic Analysis of Rice False Smut Resistance Using Major Gene Plus Polygene Mixed Genetic Model

LI Yu-Sheng,ZHU Zhen,ZHANG Ya-Dong,ZHAO Ling,WANG Cai-Lin*   

  1. Institute of Food Crops, Jiangsu Academy of Agricultural Science / Jiangsu High Quality Rice Research and Development Center, Nanjing 210014, Jiangsu, China
  • Received:2008-02-18 Revised:1900-01-01 Online:2008-10-12 Published:2008-10-12
  • Contact: WANG Cai-Lin

摘要: 稻曲病是由稻曲病菌引起的水稻真菌病害, 目前已上升为我国水稻主要病害之一, 探明水稻稻曲病的抗性遗传机制对制定抗病育种策略具有现实指导意义。本研究以病情指数为指标, 利用高效引发稻曲病人工接种方法对来自抗病亲本IR28(籼稻)与感病亲本大关稻(粳稻)组合的亲本及其衍生的F10代重组自交系群体(RIL)进行抗病性评价, 采用数量性状的主基因+多基因混合遗传模型对抗性的遗传模型进行判别与遗传参数的估计。结果表明, 水稻稻曲病抗性的遗传除受主基因控制外还受多基因的影响, 符合E-1-3遗传模型, 即2对主基因+多基因混合遗传模型, 2对主基因间表现为等加性作用, 加性效应为11.41; 主基因遗传率为76.67%, 多基因遗传率为22.86%, 抗性遗传存在明显的主基因效应。提示抗稻曲病育种时不仅要考虑主基因对抗病性的作用, 也不能忽视基因对抗性的影响。

关键词: 水稻, 稻曲病抗性, 遗传, 主基因+多基因混合遗传模型

Abstract: Rice false smut, a fungus disease caused by Ustilaginoidea virens (Cooke) Takahashi, has become one of the most important rice diseases in China. It is of practical guiding significance to probe resistant mechanism for programming rice breeding for resistance to false smut. The present study was aimed to estimate the genetic model and genetic parameters of rice false smut resistance using the artificial inoculation technique to induce the rice false smut efficiently, and the disease rate index scored based on percentage of the infected grains. The experiment was conducted using 157 recombinant inbred lines (RILs) population of F10 derived from a cross of IR28 (indica) ´ Daguandao (japonica), two parents exhibited resistant and susceptible to rice false smut respectively. The results showed that the rice false smut resistance was controlled by two major genes plus polygene mixed ge-netic model (model E-1-3), and two major genes had equivalent additive effect of 11.41, their heritability was about 76.67%, while the heritability of polygene was about 22.86%. The resistance to rice false smut had significant major gene effect, and the results implied that not only major gene’s effect but also polygene’s effect should be considered in breeding for resistance to rice false smut.

Key words: Rice, False smut resistance, Inheritance, Major gene plus polygene mixed genetic model

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