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在AUX/IAA16中插入一个可转换的元素会破坏剪接,并导致Bassia scoparia中的auxin耐药性

Jacob S Montgomery¹, Neeta Soni¹, Sofia Marques Hill¹

¹Department of Agricultural Biology, Colorado State University, Fort Collins, Colorado, USA.

The Plant journal : for cell and molecular biology

|July 21, 2025

概括

科希亚的迪坎巴耐药性与突变的AUX/IAA16基因有关,由逆转移素插入引起. 这种突变影响了auxin反应,可能会在耐药的kochia群体中产生适应性成本.

科学领域:

植物遗传学植物遗传学
抗除草剂耐药性抗除草剂耐药性
分子生物学分子生物学

背景情况:

科希亚 (Bassia scoparia) 的迪坎巴耐药性在农业中构成了重大挑战.
之前的研究表明,AUX/IAA16基因与迪坎巴耐药性机制有关.

研究的目的:

确定科希亚种群中迪坎巴耐药性的遗传基础.
阐明科希亚体中迪坎巴耐药性背后的分子机制.

主要方法:

从一个抗迪坎巴的科希亚线生成了一个合成映射群体.
利用限制位置关联的DNA测序来进行链接映射.
采用长读测序来识别与耐药性相关的遗传元素.
开发了转基因Arabidopsis thaliana线来研究基因功能.

主要成果:

在科希亚基因组的染色体4上确定了一个单一的耐药性位点.
在耐药植物中发现了一种突变的AUX/IAA16等位基因,该等位基因因被TRIM逆转移子插入所破坏.
表达突变AUX/IAA16的转基因阿拉比多普西斯对迪坎巴和IAA的敏感性降低.
实验室试验显示,对突变的AUX/IAA16蛋白有改变的奥素结合亲和力.

结论:

在AUX/IAA16中插入TRIM反转移子是这种科希亚群体中迪坎巴耐药性的可能原因.
突变的AUX/IAA16等位基因通过改变辅酶反应来赋予耐药性,并且可能涉及健康成本.
了解这种机制对于管理抗除草剂可希亚的管理至关重要.

关键词:

这是2.4D的2.4D.降级 degron 降级降低降低迪坎巴迪坎巴 (Dicamba) 是一个抗除草剂耐药性抗除草剂耐药性科希亚科希亚是什么意思链接映射链接映射链接映射超越法律的法律.在反向转换中.拼接的变种是拼接的变种.表面的等离子体共振.

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