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  • 钟惠,李成儒,沈立明,等.弧距虾脊兰5个野生居群表型多样性分析[J].植物遗传资源学报,2021,22(3):734-747.    [点击复制]
  • ZHONG Hui,LI Cheng-ru,SHEN Li-ming,et al.Phenotypic Diversity Analysis of Five Wild Populations of Calanthe arcuata[J].植物遗传资源学报,2021,22(3):734-747.   [点击复制]
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弧距虾脊兰5个野生居群表型多样性分析
钟惠1, 李成儒1, 沈立明1, 李笑平1, 朱雅婷1, 郭明2, 刘仲健1, 吴沙沙1, 翟俊文1
0
(1.兰科植物保护与利用国家林业和草原局重点实验室;2.陕西太白山国家级自然保护区管理局)
摘要:
以秦岭山脉主峰太白山南北两侧的5个弧距虾脊兰(Calanthe arcuata)野生居群为研究对象,通过多样性(Shannon-Wiener)指数(I)、巢式方差分析、变异系数分析、主成分分析、相关分析、聚类分析等方法,对弧距虾脊兰26个性状表型多样性进行分析。结果显示:22个表型性状在弧距虾脊兰群体间和群体内都存在丰富的变异,变异系数在10.95%~46.05%间,群体内的变异程度大于群体间变异。本研究的4个质量性状中花瓣颜色具有相对较高的多样性指数(为1.12),变化丰富。叶长宽比平均变异系数最大,中萼片宽平均变异幅度最小。主成分分析结果显示,花朵数量、中萼片长、侧萼片长、花横径和中萼片宽等花部器官以及叶宽等营养器官的变异是其表型变异的主要因素。表型性状相关性主要集中于花部之间,说明花部之间的相关性大,且与地理因子中的海拔相关性大。5个居群聚为2类,大殿居群海拔远高于其他四个居群而聚为一支,22个表型性状R型聚类聚为3类。本研究为弧距虾脊兰的表型多样性提供重要数据,群体内和群体间的表型分化系数都较高,建议对野生居群进行就地保护,在此基础上建立种质资源库,为该类群植物育种及开发利用提供理论依据。
关键词:  弧距虾脊兰  野生居群  表型多样性  资源保护
DOI:10.13430/j.cnki.jpgr.20201114002
投稿时间:2020-11-14修订日期:2020-12-08
基金项目:福建省自然科学基金面上项目(2020J01586);福建农林大学园林学院(合署)优秀博硕士论文培育项目(YSYL-yxlw-2)
Phenotypic Diversity Analysis of Five Wild Populations of Calanthe arcuata
ZHONG Hui1, LI Cheng-ru1, SHEN Li-ming1, LI Xiao-ping1, ZHU Ya-ting1, GUO Ming2, LIU Zhong-jian1, WU Sha-sha1, ZHAI Jun-wen1
(1.Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, College of Landscape Architecture, Fujian Agriculture and Forestry University;2.Administration of Shaanxi Taibai Mountain National Nature Reserve)
Abstract:
In this study, we investigated the phenotypic diversity of 26 characters of five main natural populations of Calanthe arcuata distributed at the north and south slopes on the main peak of the Qinling Mountains in China. The statistical methods used included Shannon-Wiener index, nested variance analysis, coefficient of variation analysis, principal component analysis (PCA), correlation analysis and cluster analysis. The results showed that: 22 phenotypic traits had rich coefficient of variation of 10.95% ~ 46.05% within and among the populations in C. arcuata, and the intra-population variation was greater than the inter-population variation. The petal color in this study had a relatively higher diversity index (1.12) among the four quality traits, indicating that the percentage of petal color varied greatly. The average coefficient of variation of leaf length-to-width ratio was the largest, and that of the middle sepal width was the smallest. The PCA analysis indicated that the length of middle sepal, width of middle sepal, length of the lateral sepal, width of synsepal, width of leaves and number of flowers were the main sources of phenotypic variation. The correlation of phenotypic traits was mainly concentrated among the flowers, and highly correlated with the altitude among the geographical factors. The five populations are clustered into two groups, with the Dadian (DD) population, which was at a much higher altitude than the other four populations, clustered in a branch of itself, and the 22 phenotypic traits were clustered in R into three groups. This study provides a theoretical basis for the strategy of in-situ conservation of the wild populations and for establishment of germplasm bank, breeding, development and utilization of these plants.
Key words:  Calanthe arcuata  wild population  phenotypic diversity  resource conservation

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