细胞遗传学识别和分子标记分析两种小麦-Thinopyrum ponticum转位与条纹抗性

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Guotang Yang^1,2, Yi Han^1,2, Huihui Yin³

¹State Key Laboratory of Wheat Improvement, Shandong Agricultural University, Tai'an 271018, China.

Plants (Basel, Switzerland)

|January 11, 2025

概括

来自Thinopyrum ponticum的新小麦品种SN21171和SN52684对Puccinia striiformis (Pst) 条纹具有免疫力. 这些线条为开发耐药小麦品种提供了宝贵的遗传资源.

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:

条纹生,是由Puccinia striiformis f. sp. 引起的三 (Pst),是对小麦生产的重大全球威胁.
野生小麦的亲属Thinopyrum ponticum具有对Pst的自然免疫力,使其成为抗性基因的宝贵来源.

研究的目的:

从Thinopyrum ponticum进入小麦通过远程杂交.
描述由此产生的小麦-异种转移线的耐药性和农学特征.

主要方法:

远程杂交被用来创建两个转位线,SN21171和SN52684.
疾病评估评估了成年植物对Pst.的耐药性.
分子细胞遗传学和标记分析确定了特定的转位染色体.
进行了型分析和农学特征评估.

主要成果:

在成年植物阶段,SN21171和SN52684都表现出对Pst (CYR32) 的免疫力.
分子分析证实了T3E^b-3DS·3DL和T1E^b-1BS·1BL转位在线中的存在.
在这两种基因系中,与经常出现的母基因YN15.5相比,发现了染色体的结构变异.
SN21171的农学性能与YN15相似,而SN52684的谷数和千粒重量有所改善.

结论:

开发的转位线SN21171和SN52684是小麦条纹抗育种的宝贵遗传资源.
这些线条,以及已识别的特定标记,可以用来增强小麦对Pst.的抵抗力.

关键词:

这种植物名为Thinopyrum ponticum.细胞遗传学分析内部定位标记的标记器条纹生条纹生转移线路的转移线路是什么小麦小麦小麦小麦小麦小麦小麦.

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