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首页> 外文期刊>Genetic Resources and Crop Evolution >Classification of bentgrass (Agrostis) cultivars and accessions based on microsatellite (SSR) markers
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Classification of bentgrass (Agrostis) cultivars and accessions based on microsatellite (SSR) markers

机译：基于微卫星（SSR）标记的藤本植物（Agrostis）品种和种质分类

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Genetic relationships among Agrostis species used for turf have been difficult to discern. Recent studies have either confirmed or contradicted previously proposed genetic relationships based on chromosome pairing behavior of inter-specific hybrids. The objective of the current study was to assess genetic relationships among Agrostis cultivars and accessions by using newly available A. stolonifera microsatellite (SSR) markers. Nuclear SSR (nuSSR) and chloroplast SSR (cpSSR) markers were used to genotype 16 individuals from each of 74 Agrostis cultivars and accessions. Genetic relationships based on nuSSR markers most closely resembled species relationships proposed by Jones in the 1950s. Contrary to the work of Jones, genetic relationships based on cpSSR markers indicated that A. canina was more closely related to A. stolonifera than to A. capillaris. We hypothesize that chloroplast introgression via interspecific hybridization between A. canina and A. stolonifera resulted in these species sharing common chloroplast genome lineages, while maintaining disparate nuclear genome lineages. Genetic relationships within Agrostis species based on nuSSR markers closely matched known pedigree relationships. Bayesian clustering analysis of nuSSR markers indicated that most modern seeded A. stolonifera cultivars exhibited high levels of admixture. Our study confirms that nuSSR markers distinguish Agrostis species and cultivars, and are valuable for studying genetic diversity and genetic relationships within the genus Agrostis.
机译：用于草皮的Agrostis物种之间的遗传关系很难辨别。最近的研究已经证实或与基于种间杂种的染色体配对行为提出的遗传关系相矛盾。本研究的目的是通过使用新近获得的A. stolonifera微卫星（SSR）标记来评估Agrostis品种与种质之间的遗传关系。使用核SSR（nuSSR）和叶绿体SSR（cpSSR）标记对来自74个Agrostis品种和品系的16个个体进行基因分型。基于nuSSR标记的遗传关系与琼斯在1950年代提出的物种关系最为相似。与琼斯的工作相反，基于cpSSR标记的遗传关系表明，犬曲霉与stolonifera的亲缘关系比毛细线虫更紧密。我们假设通过A. canina和A. stolonifera之间的种间杂交使叶绿体渗入导致这些物种共享共同的叶绿体基因组谱系，同时保持不同的核基因组谱系。基于nuSSR标记的Agrostis物种内的遗传关系与已知的谱系关系紧密匹配。贝叶斯对nuSSR标记的聚类分析表明，大多数现代播种的A. stolonifera品种表现出高水平的混合。我们的研究证实了nuSSR标记可以区分Agrostis物种和栽培品种，对于研究Agrostis属内的遗传多样性和遗传关系非常有价值。

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