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在小麦-Thinopyrum中间转位系中抗基因的伪链接或真实链接

Jianbo Li¹, Merrill Ryan², Chongmei Dong¹

¹Plant Breeding Institute, School of Life and Environmental Sciences, The University of Sydney, Cobbitty, NSW, 2570, Australia.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

|December 27, 2024

概括

小麦添加线Z4和Z5具有来自Thinopyrum intermedium的抗基因. Z4中的叶子生和条纹生抗性基因表现出伪链接,而不是真正的链接,存在于不同的转位染色体上.

科学领域:

植物遗传学和育种.
提高作物质量提高作物质量
小麦-外星人的内进.

背景情况:

薄皮中间体是小麦耐药基因的宝贵来源.
开发携带外来基因的小麦添加线对作物改善至关重要.
了解基因链接对于有效的育种策略至关重要.

研究的目的:

为了分析小麦-Thinopyrum中间添加线Z4和Z5.5的染色体结构.
解决 Z4 中的叶子生和条纹生抗性基因之间的联系关系.
为了研究小麦中外来抗基因的遗传.

主要方法:

防反应测定 (叶子防和条纹防) 对不同的病态类型.
90K SNP 用于标记分析的基因定型.
分子细胞遗传学分析用于染色体鉴定.
对逆交种群和自我种群进行遗传学研究的分析.

主要成果:

叶子耐基因位于转位染色体T3DS-3AS.3AL-7StS上 (Z4和Z5中很常见).
条纹抗基因位于转位染色体T3AL-7StS.7StL (Z4特有的) 上.
遗传学研究表明,叶子生和条纹生抗性基因之间存在遗传联系.
Z4中的叶子生和条纹生抗性基因位于不同的转位染色体上.

结论:

在小麦添加线Z4中的叶子生和条纹生抗性基因位于不同的Thinopyrum中间转位染色体上.
观察到的叶子生和条纹生抗性之间的联系是伪联系,而不是真正的遗传联系.
这些发现提供了对小麦抗性外来基因侵入的遗传结构的见解.

关键词:

外星人的抗性基因.鱼类鱼类是一种鱼类.吉什吉什 (Gish Gish) 是一个名为吉什的语言.小麦 90K SNP 阵列数组

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