| 杜成章 1#, 龙珏臣 1#, 龚万灼 1, 朱振东 2, 宗绪晓 2, 张继君 1*.蚕豆赤斑病抗性的主基因+多基因遗传分析[J].植物保护,2019,45(6):131-137. |
| 蚕豆赤斑病抗性的主基因+多基因遗传分析 |
| Analysis of major genes plus polygenes mixed inheritance for resistance to chocolate spot on faba bean |
| 投稿时间：2018-10-16 修订日期：2018-12-19 |
| DOI：10.16688/j.zwbh.2018444 |
| 中文关键词: 蚕豆 赤斑病 主基因＋多基因混合遗传模型 抗性遗传 |
| 英文关键词:faba bean chocolate spot major gene plus polygene mixed genetic model method resistance breeding |
| 基金项目:国家现代农业产业技术体系(CARS-09); 重庆市科技计划项目(cstc2015jcsf-nycgzhA80016); 稻豆轮作周年高效生产关键技术研究及示范(201303129) |
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| 中文摘要: |
| 赤斑病是世界蚕豆产区的主要病害, 严重威胁蚕豆安全生产。为明确蚕豆赤斑病的抗性遗传规律, 本研究用赤斑病抗性较好的蚕豆品种‘通蚕鲜8号’、‘启豆2号’分别与高感赤斑病蚕豆品种‘成胡10号’、‘成胡14号’配制杂交组合, 采用主基因+多基因混合遗传模型方法对2个组合6世代(P1、P2、F1、F2、BCP1、BCP2)的赤斑病抗性进行了遗传分析。结果表明, 蚕豆对赤斑病的抗性最适合遗传模型为E-0(两对加性-显性-上位性主基因+加性-显性-上位性多基因)。两对赤斑病抗性的主基因加性效应值在2个组合中分别为-40.43、2.16和-36.31、-3.86, 显性效应值分别为-15.22、-15.72和-5.98、-6.48。2个组合的主基因遗传率在BCP1、BCP2、F2中分别是19.05%、51.99%、70.90%和19.29%、52.13%、77.35%, 多基因遗传率分别为0、0、19.9%和0、0、21.06%。本试验条件下, 蚕豆品种‘通蚕鲜8号’、‘启豆2号’对赤斑病抗性由2个主效基因控制, 同时受多基因修饰作用, 环境对其抗性影响较小。感病亲本对后代抗病性的负向影响较大, 在育种实践中需适当提高感病亲本的抗病性, 以提高后代的抗性水平。 |
| 英文摘要: |
| Chocolate spot is one of the main diseases in the faba bean production areas in the world, which seriously threatens the production of faba bean. To confirm the inheritance of the resistance of faba bean to chocolate spot, the chocolate spot highly resistant varieties ‘Tongcanxian No.8’ and ‘Qidou No.2’ were crossed with the highly susceptible varieties ‘Chenghu No.10’ and ‘Chenghu No.14’, and the major gene plus polygene mixed genetic model was used to conduct a genetic analysis of the 2 cross combinations for 6 generations (P1, P2, F1, F2, BCP1, BCP2). The results indicated that the most suitable genetic model of faba bean chocolate spot resistance is E-0 (two addictive-dominant-epistatic major gene + addictive-dominant-epistatic polygene). Additive effect values of the two major chocolate spot resistance genes in the above two combinations were -40.43, 2.16 and -36.31, -3.86, and the dominant effect values were -15.22, -15.72 and -5.98, -6.48, respectively. The inheritability of major genes in the above two combinations was 19.05%, 51.99%, 70.90% and 19.29%, 52.13%, 77.35% in BCP1, BCP2 and F2, and the inheritability of polygene was 0, 0, 19.9% and 0, 0, 21.06%, respectively. Therefore, chocolate spot resistance in faba bean might be controlled by two major genes, and modified by polygenes at the same time, while the environment had less impact on it. The susceptible parents had a negative effect on their derived generation’s resistance. In the breeding practice, it is required to improve the resistance of susceptible parents so as to improve the next generation’s disease resistance. |
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