| 刺梨杂种F1 代田间抗白粉病的遗传分析初探 |
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| 引用本文： | 文晓鹏,徐强,樊卫国,邓秀新.刺梨杂种F1 代田间抗白粉病的遗传分析初探[J].园艺学报,2005,32(2):304-307. |
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| 作者姓名： | 文晓鹏 徐强 樊卫国 邓秀新 |
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| 作者单位： | ( 贵州大学农业生物工程省建重点实验室, 贵阳550025; 华中农业大学作物遗传改良国家重点实验室, 武汉430070; 贵州大学农学院, 贵阳550025) |
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| 基金项目： | 国家自然科学基金项目(30123001,30260070)，贵州大学人才引进项目 |
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| 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。
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| 关 键 词： | 刺梨 白粉病 病情指数 抗性遗传 |
| 文章编号： | 0513-353X(2005)02-0304-03 |
| 收稿时间： | 2004-2-24 |
| 修稿时间： | 2004-6-17 |
A Preliminary Study on Inheritance Tendency of the Resistance to Powdery Mildew Using F1 Progenies of Chestnut Rose(Rosa roxburghii Tratt) |
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| Wen Xiaopeng,Xu Qiang,Fan Weiguo,Deng Xiuxin.A Preliminary Study on Inheritance Tendency of the Resistance to Powdery Mildew Using F1 Progenies of Chestnut Rose(Rosa roxburghii Tratt)[J].Acta Horticulturae Sinica,2005,32(2):304-307. |
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| Authors: | Wen Xiaopeng Xu Qiang Fan Weiguo Deng Xiuxin |
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| Institution: | 1.Pharmacy College of Jinan University, Guangzhou 510632, China;2.Drug R&D Center of Sun Yat-sen University of Medical Sciences, Guangzhou 510080, China;3.Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China |
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| 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. |
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| Keywords: | Chestnut rose(Rosa roxburghii Tratt) Powdery mildew Disease index Inheritance of resistance |
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