苦玄参40个株系表型性状遗传多样性分析

植物遗传多样性一直以来是种质资源研究的热点。为揭示苦玄参栽培种质的遗传多样性,该研究从苦玄参常年栽培种中根据形态学性状差异选择40个株系,以产量、药效物质含量及茎、叶、花等形态学性状为指标,进行物种变异和遗传多样性分析,并对其进行聚类分析,获取各株系遗传亲缘关系。结果表明：苦玄参苷IA和IB含量的遗传变异系数较高,分别为24.225%和17.853%;遗传多样性指数高,分别为1.920和2.075。产量遗传变异系数较低,仅为3.637%,但遗传多样性指数较高,达到1.884。其余表型性状指标遗传变异系数均较高,其中花色高达127.794%。数值型性状具有较高的遗传多样性,均大于1,但描述型指标...

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Published in广西植物 Vol. 37; no. 3; pp. 348 - 355
Main Author 谢阳姣 何志鹏 闫国跃 李耀燕 符标芳 白燕远 冯秋瑜
Format Journal Article
LanguageChinese
Published 广西中医药大学,南宁,530001 2017
Subjects
变异
聚类分析
苦玄参
表型性状
遗传多样性
变异
genetic diversity
表型性状
遗传多样性
Picria felterrae
phenotypic character
cluster analysis
苦玄参
聚类分析
variation
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ISSN1000-3142
DOI10.11931/guihaia.gxzw201604001

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Summary:植物遗传多样性一直以来是种质资源研究的热点。为揭示苦玄参栽培种质的遗传多样性,该研究从苦玄参常年栽培种中根据形态学性状差异选择40个株系,以产量、药效物质含量及茎、叶、花等形态学性状为指标,进行物种变异和遗传多样性分析,并对其进行聚类分析,获取各株系遗传亲缘关系。结果表明：苦玄参苷IA和IB含量的遗传变异系数较高,分别为24.225%和17.853%;遗传多样性指数高,分别为1.920和2.075。产量遗传变异系数较低,仅为3.637%,但遗传多样性指数较高,达到1.884。其余表型性状指标遗传变异系数均较高,其中花色高达127.794%。数值型性状具有较高的遗传多样性,均大于1,但描述型指标遗传多样性指标较低,均小于1。聚类分析可将供试材料分为4个大的类群：第Ⅰ类群共有7个株系,此类群产量性状及相关指标平均数较高;第Ⅱ类群有8个株系,茎节长度最长,其余指标中等偏下;第Ⅲ类群数量最多,有20个株系,各指标均较低;第Ⅳ类群有5个株系,苦玄参苷含量和产量均较高,综合指标比较优。相关分析结果表明,苦玄参苷IA的含量与叶缘性状具有显著相关,产量性状与茎节长度、一级分枝和末级分枝数具有极显著相关,选择优良种质应注重该4个性状的选择。该研究结果表明目前苦玄参栽培种具有广泛的变异和较高的遗传多样性,为苦玄参资源的利用提供了参考依据。
Bibliography:Plant genetic diversity has been one of the hot spots in the research into germplasm resources. To disclose the genetic diversity of cultivated germplasm of Picria felterrae,we selected 40 lines from perennially cultivated individuals based on morphological differences and analyzed species variation and genetic diversity with yield,active ingredient content as well as morphological characters including the stem,leaf and flower as the indicator; and wemade cluster analysis to obtain the genetic relationships between lines. The results showed that there was much genetic variance in the content of picfeltarraenins IAand IB,the coefficients being 24.225% and 17.853%,respectively; and the genetic diversity indexes were high,1.920 and 2.075,respectively. For the yield,the coefficient of genetic variance was comparatively low,only 3.637%,and the genetic diversity index was 1.884. There was also much genetic variance in other phenotypic characters,among which the coefficient of genetic variance of flower color was 12
ISSN:1000-3142
DOI:10.11931/guihaia.gxzw201604001