基因金字塔化用于通过制造商辅助选择在米中增强对爆发和细菌爆发病的抵抗力
Mohammad Abdul Latif1, Omar Kayess2, Rakibul Hasan2
1Plant Pathology Division, Bangladesh Rice Research Institute (BRRI), Gazipur, 1701, Bangladesh. alatif1965@yahoo.com.
Biotechnology letters
|September 16, 2025
概括
标记器辅助逆交繁殖 (MABB) 成功将五种抗病基因嵌入到一个高质量的水品种中. 这一战略开发了先进的米品种,增强了对米爆破和细菌爆破 (BB) 的抵抗力,提高了产量潜力.
科学领域:
- 植物育种 植物育种
- 遗传学 是一个遗传学.
- 农业学是一种农业学.
背景情况:
- 米疾病,特别是米爆发和细菌爆发 (BB),对全球米产量构成重大威胁.
- 开发抗病米品种对于粮食安全至关重要.
研究的目的:
- 用标记辅助逆交繁殖 (MABB) 将五个主要抗性 (R) 基因用于大米爆破 (Pi9,Pb1) 和BB (Xa4,xa13,Xa21) 转化为一种高质量的大米品种 (BRRI dhan100).
- 开发具有增强,多种疾病耐药性和提高产量的先进大米品种 (ALs).
主要方法:
- 采用三叉交叉的繁殖策略,其次是反向交叉,自我和前景选择,以产生BC3F5后代.
- 利用奇方位分析证实了耐药基因的简单门德尔遗传.
- 进行了标记-特征关联分析,以确定与疾病耐药性相关的标记物.
主要成果:
- 选择了38个高级系 (ALs),其中12个系具有所有5个R基因,15个系含有4个R基因.
- 与检查品种BRRI dhan100 (7-9) 相比,ALs显示了爆炸和BB的疾病评级 (0-3) 显著降低.
- 几个ALs (G23,G13,G5,G10,G15,G29) 的产量比检查高 (7.22-7.34/ha-1).
结论:
- MABB是一种有效的策略,用于金字塔化多个R基因,并开发高产,抗病的米品种.
- 通过MABB对候选R基因的功能验证提高了米育种计划的准确性.
- 开发的ALS代表了未来改善多种疾病耐药性的米有前途的胚胎质.
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