NPGS 埃塞俄比亚高粱种质核心集谷粒霉菌抗性的关联分析

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
H. Cuevas, L. Prom
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引用次数: 0

摘要

美国农业部农业研究服务局国家植物种质系统(NPGS)的埃塞俄比亚核心收集包括 376 个加入品系和一个基因组特征,其中发现了 151 210 个单核苷酸多态性。然而,该收集缺乏对几个重要农业性状的表型鉴定。我们对 NPGS 埃塞俄比亚核心组中的 330 个品种进行了评估,以确定它们在四种热带环境中对谷粒霉菌的抗性响应。从种子的低萌发率和高变质率来看,埃塞俄比亚 NPGS 核心集中的大多数品种都表现出对谷粒霉菌的易感性。收集的种群结构与谷粒霉抗性反应无关,这表明这些种质起源于疾病压力较低的地区。分析确定了两个萌发率高的品种(PI 457867 和 PI 454221)和三个种子退化率低的品种(PI 455036、PI 455213 和 PI 330821)。全基因组关联分析发现,染色体 1、3 和 8 中的基因组区域与观察到的谷粒霉菌抗性变异有关。对这三个位点的候选基因进行了分析,确定了涉及病原体识别和植物免疫系统信号级联的抗病基因。这五个 NPGS 埃塞俄比亚品种是用于育种前种质计划的候选品种,以培育具有谷粒霉抗性的改良种质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Association analysis of grain mould resistance in a core collection of NPGS Ethiopian sorghum germplasm
The Ethiopian core collection of the USDA-Agriculture Research Service, National Plant Germplasm System (NPGS) includes 376 accessions and a genomic characterization that revealed 151,210 single nucleotide polymorphisms. This collection, however, lacks phenotypic characterization for several important agriculture traits. A total of 330 accessions from this NPGS Ethiopian core set were evaluated for grain mould resistance response across four tropical environments. Most of the accessions in the NPGS Ethiopian collection showed susceptibility to grain mould based on the low emergence rate and high seed deterioration observed in the seeds. The population structure of the collection was not related to grain mould resistance response suggesting this germplasm originated in regions with low disease pressure. The analysis identified two accessions with high emergence (PI 457867 and PI 454221) and three (PI 455036, PI 455213 and PI 330821) with low seed degradation. Genome-wide association analysis found genomic regions in chromosome 1, 3 and 8 associated with the observed grain mould resistance variation. Candidate gene analysis within these three loci identified diseases resistance genes involved in pathogen recognition and signalling cascades of the plant immunity system. These five NPGS Ethiopian accessions are candidates for use in a pre-breeding germplasm programme to develop improved germplasm with grain mould resistance.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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