浙江黄麻资源表型性状的遗传多样性分析

Phenotypic Diversity Analysis of Jute Germplasm from Zhejiang Province

浙江是中国较早发展黄麻种植的省份之一,保存有丰富的地方黄麻资源。为明确该地方资源的表型遗传多样性,本研究以收集保存的48份浙江黄麻种质为材料,对其23个农艺性状进行两年田间鉴定,并进行表型遗传多样性分析。结果表明:48份浙江黄麻资源在多个性状上变异丰富,其中质量性状的多样性指数在0.17~1.12之间,变异系数为10.31%~60.88%,在果型、后期茎色、种皮色上多样性指数较高。数量性状的多样性指数在1.56~2.03之间,变异系数为8.59%~34.13%,在束纤维支数、束纤维强力和鲜茎干皮率上表现较高多样性。主成分分析提取前3个主成分,分别是单株生物量因子、韧皮纤维产量因子和纤维品质因子,提供了原始性状74.381%的信息。聚类分析将其分为3个类群,其中类群Ⅱ包含浙江长荚、双村红旗和干元长果等7份资源,综合农艺性状表现优异,可以直接或间接开发利用。

As one of the earliest provinces in our country to develop jute(Corchorus capsularis)planting,Zhejiang has preserved abundant local jute resources.In order to fully gain knowledge about the phenotypic genetic diversity of these local resources,48 jute germplasms from Zhejiang Province were systematically investigated and analyzed based on 23 yield and quality traits in a two-year field trial.The results revealed that there was great variation among 48 Zhejiang jute resources.The diversity index of quality characters ranges from 0.17 to 1.12,and the coefficient of variation was 10.31%to 60.88%.The fruit shape,stem colour at late stage and seed coat colour represented high values on genetic diversity.The diversity index of quantitative traits ranged from 1.56 to 2.03,and the coefficient of variation was 8.59%to 34.13%,high diversity showed in fibre fineness,fiber strength and dry bark ratio to fresh stem.The first three principal components were biomass factor,phloem fiber yield factor and fiber quality factor,which provided 74.381%information of original traits.It was divided into 3 groups by cluster analysis,among which,Group II consist of seven resources such as Zhejingchangjia,Shuangcunhongqi and Ganyuanchangguo showed comprehensive agronomic properties and could be developed and utilized directly or indirectly.