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时间:2020-03-21
《我国野牡丹属植物的表型多样性研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、热带作物学报2014,35(10):2036—2042ChineseJournalofTropicalCrops我国野牡丹属植物的表型多样性研究戴小红,孙伟生,贺军军1,罗萍”1中国热带农业科学院湛江实验站。广东湛江5240132中国热带农业科学院南亚热带作物研究所.广东湛江524091摘要对国产野牡丹属6种l6个居群的22个表型性状进行观测.通过方差分析、聚类分析、因子分析对其表型变异、种间亲缘关系等进行探讨,以揭示野牡丹属植物的表型多样性,并为其提供分类依据。结果表明:野牡丹属种间与种内居群间在数量性状上均存在丰富的表型变异,15个数量性状的变异
2、系数为6.77%34.50,其中花序花朵数、小苞片宽、叶柄长、花梗长的变异较大,果径、花径、花萼长、花瓣长和叶长宽比的变异较小:质量性状的多样性主要存在于种间,种内居群间在叶柄颜色、花色上存在差异。表型聚类结果显示当平均距离为34时.16个居群可分为3类,展毛野牡丹、多花野牡丹、细叶野牡丹和野牡丹为1类,毛慧、地惹各为1类.同种下各居群没有严格依地理距离聚类。因子分析结果显示,花部形态变异是野牡丹属植物表型分化的主要因素.基出脉、花梗长、茎被毛的变异对其表型分化的作用较小,在进行表型分类时可避免次要性状的干扰。关键词野牡丹属;表型多样性;聚类分析;因
3、子分析中图分类号9944文献标识码APhenotypicDiversity0fMelas幻口L.inChinaDAIXiaohong,SUNWeisheng2,HEJunjun,LUOPing1ZhanjiangExperimentStation,CATAS,Zhanjiang,Guangdong524013,China2SouthSubtropicalCropsResearchInstitute,CATAS,Zhanjiang,Cuangdong524091,ChinaAbstractInordertorevealthephenotypicdive
4、rsityofMelastomaLandprovideelassificationevidence.twenty-twophenotypictraitsofsixspeciesandsixteenpopulationsofMelastomaL.inChinawereinvestigated.Phenotypicvariationsbetweenandwithinspeciesaswellasphylogeneticrelationshipbetweenspecieswerediscussedbyusingvarianceanalysis.cluste
5、ranalysisandfactoranalysis.TheresultsshowedtllattherewererichphenotypicvariationsbetweenandwithinspeciesofMelastomaL.inquantitativetraits.Thevariationeoefficientsof15quantitativetraitsrangedfrom6.77%to34.50%.Amongthesetraits,flowernumberofinflorescence,braetletwidth,petioleleng
6、thandstalklengthvariedmorewhilefruitdiameter,flowerdiameter,calyxlength,petallengthandlength—widthratioofleafvariedless.Thediversityofqualitativetraitsmainlyexistedbetweenspecies,andcolorsofpetioleandfloweralsovariedinpopulations.Accordingtoclusteranalysisbytwenty—twophenotypic
7、traits,16populationsofMelstomaL.couldberoughlydividedintothreegroupswhentheaveragedistancewasabout34.BesidesM.i'tolTna~,M.affi,~,M.intermediumandM.candidumgatheringinonegroup,M.sanguineumanddodecandrumwasdividedintotwogroupsrespectively.Populationswithinspeciesdidnotclusteredst
8、rictlybygeographicaldistances.Factoranalysisindicatedt
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