软枣弼猴桃果实性状多样性分析与综合评价

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Abstract：This study evaluated 64Actinidia arguta germplasmand 12 related species to investigate variation and diversity in2O fruit traits using a group of methodologies including corelation，cluster，principal component analyses，with an aim to facilitate the conservation and utilization of Actinidia arguta germplasm resources. Results showed that the diversity indices （H'）were higher from quantitative traits （ranging from l.45 to 2.08） than forqualitative traits （ranging from O.59 to2.19）.Among the76 accessions，the most frequent fruit shoulder shape was square，the fruit beak shape was minutely cuspidal bulge，and the cross section shape of fruit center was eliptical.These threequalitative traits exhibited relatively low diversity indices of 0.75，0.67，and 0.59， respectively. Quantitative traits displayed an average coefficient of variation （CV） of 26.29% ，with ascorbic acid content having the highest CV（82.74%） and dry matter content having the lowest CV（11.62%） . Cluster analysis categorized germplasms into five distinct groups with significant inter-group trait variations. Principal component analysis of 11 quantitative traits identified four components collectively accounting for 82.35% cumulative variance.Key phenotypic indicators included single fruit weight，titratableacid content，ascorbic acid content， and total soluble sugar content. Eight elite germplasms such as Ruanzao 8O25，Longcheng 2，Danyang LD133， Mizao 1，2019125317（from The Third National Crop Germplasm Resource Survey and Collection Action）， Changjiang 1，Huanyou 1，and Fengyu 2 were selected through comprehensive evaluation.The substantial phenotypic diversity provides a foundation for the selection，breeding，andutilization of Actinidia arguta germplasm resources.

Keywords：Actinidia arguta;germplasm resources;phenotypic diversity

软枣弼猴桃［Actinidiaarguta（Sieb.&Zucc）Planch.exMiq.」又名软枣子、弼猴梨、奇异莓等，属于猕猴桃科（Actinidiaceae）弼猴桃属（ActinidiaLindl.）落叶藤本植物1，是一种新兴特色浆果，其野生资源广泛分布于日本、朝鲜、韩国及俄罗斯的远东地区、中国北方广袤区域和南方多个省份的高寒山区[2]。（剩余18325字）