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2 Institute of Forage and Grassland Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin, Heilongjiang Province 150086, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309574982179582506, articleId=1309574981965673000, tenantId=1146029695717560320, journalId=1308397196074385509, language=CN, title=300份羊草种质资源表型多样性分析与优异资源筛选, columnId=1309565024058835950, journalTitle=草地学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=本研究以300份羊草[Leymus chinensis （Trin. ex Bunge） Tzvelev]种质为材料，针对其结实率低等生产问题，通过连续三年田间试验，系统测定了抽穗期株高、成熟期株高、叶长和叶宽4个生长性状，以及抽穗率、穗重、穗长、穗节数、小穗数、每小穗小花数、每穗种子数和结实率8个结实相关性状。多样性分析和聚类分析显示，群体具有丰富的遗传背景：变异系数为10.73%~51.86%，遗传多样性指数为1.853~2.068；300份资源可聚为4个类群。相关性分析表明，结实率与穗长、穗重、每穗种子数等11个指标存在不同程度的相关关系。主成分分析的前4个主成分累计贡献率达79.26%，可有效代表原始性状的绝大部分信息。最终，基于表型数据的最佳线性无偏估计值（Best linear unbiased estimator，BLUE），利用综合隶属函数结合抽穗率和结实率表现，综合评价筛选出50份优异种质资源。本研究为后续基因挖掘、表型-基因型耦合分析和生物育种提供支撑。, authors=董弘斌¹, 王建丽², 李新一¹, 高秋¹, 王梅娟¹, 林积圳¹, 张义¹, 洪军¹, authorsList=董弘斌, 王建丽, 李新一, 高秋, 王梅娟, 林积圳, 张义, 洪军, authorCompany=1 全国畜牧总站, 北京 100125;
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