园艺学报 ›› 2005, Vol. 32 ›› Issue (02): 304-306.

• 研究报告 • 上一篇    下一篇

刺梨杂种F1 代田间抗白粉病的遗传分析初探

文晓鹏1, 2;徐强2;樊卫国3;邓秀新2   

  1. (1 贵州大学农业生物工程省建重点实验室, 贵阳550025; 2 华中农业大学作物遗传改良国家重点实验室, 武汉430070; 3 贵州大学农学院, 贵阳550025)
  • 收稿日期:2004-02-24 修回日期:2004-06-17 出版日期:2005-04-25 发布日期:2005-04-25

A Preliminary Study on Inher itance Tendency of the Resistance to PowderyMildew Using F1 Progen ies of Chestnut Rose ( Rosa roxburghii Tratt)

Wen Xiaopeng1, 2;Xu Qiang2;Fan Weiguo3;Deng Xiuxin2   

  1. (1Guizhou Key Laboratory of Agricultural Bioengineering, Guizhou University, Guiyang 550025, China; 2National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; 3Agricultural College, Guizhou University, Guiyang 550025, China)
  • Received:2004-02-24 Revised:2004-06-17 Online:2005-04-25 Published:2005-04-25

摘要: 采用刺梨‘贵农6号’ (抗) ב贵农5号’ (感) 正反交获得的F1代群体, 对刺梨白粉病抗性的遗传倾向进行研究。结果表明, F1 代杂种的抗病性呈正态分布, 正反交群体病情指数的遗传传递力( Ta ) 明显高于亲中值, 广义遗传力(H2 ) 分别为61.0%和60.4%; 按病情指数的大小, F1 代群体可明显聚为高抗、中抗和感病等3类, 经X2 检测符合1∶2∶1分离比率, 推测抗病性受2对主效基因控制, 且非等位基因间存在积加效应, 还受多个修饰基因的调控作用。

关键词: 刺梨, 白粉病, 病情指数, 抗性遗传

Abstract: F1 progenies of‘Guinong 6’ ( resistant) בGuinong 5’ ( susceptible) and their reciprocal cross were used to investigate the inheritance tendency of resistance to powderymildew disease of chestnut rose (Rosa roxburghii Tratt). The result showed that the disease index of F1 progenies showed normal distribution. Hereditaries ( Ta ) of F1 progenies disease indexwere significantly higher than mid-parent value, and the broad-sense heretabilities of Guinong 6 ×Guinong 5 and the recip rocal crosswere 61.0% and 60.4% respectively. Based on the disease index, the F1 progenies of Guinong 6 ×Guinong 5 could be grouped into three subclusters using UPGMA method, which revealed high resistance, moderate resistance, and susceptibility respectively, and their segregation ratios were 1∶2∶1 by X2 test. These results suggest that the resistance appears to be co-dominated by two types of genetic models: 1) Two alleles which show additive effect between them; 2) Multiple genes which contribute to the continued values of disease index in same subcluster.

Key words: Chestnut rose (Rosa roxburghii Tratt), Powdery mildew, Disease index, Inheritance of resistance