摘要
为了进一步优化现有的品种分类方法,本文对滇山茶(Camellia reticulata)的主栽品种进行花部形态的多样性、相关性、主成分和聚类分析。结果表明:9个形态指标中,变异系数和多样性指数(H)较高的为雄蕊形态(筒状、束状或瓣化)、雄蕊数、花瓣颜色和花瓣数。雄蕊数与花瓣数呈显著负相关,而雄蕊形态赋值则与花瓣数显著正相关。第一主成分是以雄蕊形态为代表的综合性状(贡献率46.88%),第二主成分为花色(贡献率27.55%),第三主成分为花瓣长宽比(贡献率25.57%)。100个品种被聚为3类:第Ⅰ类有26个品种,其雄蕊基部连合成筒状;第Ⅱ类49个,其雄蕊基部分离成束状;第Ⅲ类25个,雄蕊全部瓣化,或少而不成束。在上述结果的基础上,拟定了基于雄蕊形态的滇山茶品种分类新方法:筒蕊滇山茶品种群、束蕊滇山茶品种群和瓣蕊滇山茶品种群。三个品种群除观赏之外,筒蕊品种群还是优良的油用种质。
In this paper,the diversity analysis,correlation analysis,principal component analysis,and cluster analysis were conducted by flower morphological characters of the main Camellia reticulata cultivars,so as to further optimize the current cultivar classification method.The results indicated that among the nine morphological characters,the highest coefficient of variation and diversity index H were stamen morphology(tubular,fascicular,or petaloid),followed by the stamen number,petal color and petal number.The number of stamens was significantly negative-correlated with the number of petals,while the assignment of stamen morphology was significantly positive-correlated with the number of petals.The first principal components was the comprehensive character represented by stamen number(contribution rate of 46.88%),followed by the petal color(27.55%),and the petal length/width(25.57%).A total of 100 C.reticulata cultivars were clustered into three clades.The cladeⅠhad 26 cultivars,whose stamen bases were tubular.The cladeⅡincluded 49 cultivars,with fascicular stamen bases.The cladeⅢinvolved 25 cultivars,which had petaloid stamens or few stamens but did not appear as bundles.Based on the above results,a new classification method for the C.reticulata cultivars by using stamen morphology was proposed,namely(1)tubular stamen cultivar group of C.reticulata,(2)fascicular stamen cultivar group of C.reticulata,and(3)petaloid stamen cultivar group of C.reticulata.Apart from their ornamental purpose,the tubular stamen cultivar group is also an excellent germplasm for oil use.
作者
徐晓丹
郑伟
张乐
李玉琦
王艳青
王仲朗
陈龙清
XU Xiaodan;ZHENG Wei;ZHANG Le;LI Yuqi;WANG Yanqing;WANG Zhonglang;CHEN Longqing(Department of Landscape Architecture,Faculty of Architecture and City Planning,Kunming University of Science and Technology,Kunming 650504,China;Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China;Faculty of Landscape Architecture and Horticulture,Southwest Forestry University,Kunming 650224,China)
出处
《园艺学报》
北大核心
2025年第6期1530-1538,共9页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(32060691,31660228)。
关键词
滇山茶
花部性状
品种分类
品种群
聚类分析
Camellia reticulata
flower character
cultivar classification
cultivar group
cluster analysis
作者简介
通信作者:郑伟.E-mail:57280234@qq.com。
