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2. Agricultural Technology Extension Station, Agriculture, Rural Affairs, Science, Technology and Water Resources Bureau of Gerze County, Ngari Prefecture, Gerze, Xizang 859200, 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=1309575139784749968, articleId=1309575139327570829, tenantId=1146029695717560320, journalId=1308397196074385509, language=CN, title=不同狼尾草种质资源田间抗寒性鉴定与综合评价, columnId=1309565024058835950, journalTitle=草地学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=为筛选狼尾草属（Pennisetum）抗寒种质资源，明确不同种质的抗寒性差异，为抗寒育种提供理论依据。本研究以118份狼尾草种质为材料，通过田间低温胁迫处理，对8个抗寒相关指标进行测定与综合评价。结果表明，供试种质抗寒相关性状遗传多样性丰富，可为抗寒育种提供充足的遗传基础。叶绿素含量与返青截根苗数、茎秆含糖量显著相关，是影响狼尾草抗寒差异的关键因素。主成分分析结果将8个指标归纳为4个主成分，累计贡献率达80.924%，核心指标为低温胁迫后叶绿素下降值、低温叶绿素含量、返青截根苗数、茎秆含糖量。基于聚类分析将所有种质划分为3个类群，结合隶属函数法筛选出Pp20230630-3，Pp20230628-5，Pp014等30份抗寒优异种质。本研究为狼尾草抗寒种质创新与新品种选育提供重要材料与理论依据。, authors=孙绮璐¹, 马杰宇¹, 彭燕¹, 聂刚¹, 穷达², 张新全¹, authorsList=孙绮璐, 马杰宇, 彭燕, 聂刚, 穷达, 张新全, authorCompany=1 四川农业大学草业科技学院, 四川 成都 610000;
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