摘要
对文心兰77份种质资源的28个表型性状进行测定与评价,通过相关性分析、主成分分析及聚类分析获得其表型遗传多样性。结果表明:21个数量性状的遗传多样性指数均值达1.85,变化区间为1.36~2.07,其中数值最大为株幅(2.07);在7个质量形状中,除叶色性状外的其他表型性状的多样性指数均大于1,均值为1.23,最大表现为唇瓣颜色(1.79)。相关性分析结果表明数量性状之间关系复杂,大部分性状之间呈现显著或极显著的正相关。主成分分析筛选出4个特征值大于1的主成分,累计贡献率达74.079%,由蕊柱长、中萼宽、花枝长、花朵数量、侧萼长和宽、唇瓣宽7个表型特征向量组成。聚类分析表明,文心兰种质划分为5大类群,其中第Ⅰ类群的15个品种为小株型,适合作为办公室小盆花;第Ⅳ类群由30个品种组成,为农艺性状综合表现良好,较适合做鲜切花的品种。研究结果可为文心兰新品种的培育及杂交亲本的选择提供理论基础。
28 traits of 77 Oncidium germplasm resources were measured and evaluated.The correlation analysis,princi-pal component analysis and cluster analysis of the traits of Oncidium were used to obtain the phenotypic genetic diver-sity analysis results.The average value of genetic diversity index of 21 quantitative traits reached 1.85,and the variation range was 1.36 to 2.07,with the largest value being the plant width(2.07).In the quality shape,the diversity index of other phenotypic traits except leaf color traits was greater than 1,with an average value of 1.23,and the largest mani-festation was the lip color(1.79).The correlation analysis results showed that the relationship between quantitative traits was complex,and most of the traits showed significant or extremely significant positive correlation.Four principal components with eigenvalue greater than 1 were screened out by principal component analysis,and the cumulative con-tribution rate reached 74.079%.It was mainly composed of Oncidium gynandrium length,middle sepal width,flowering branches length,number of flowers,sidesepal width,lip width,and sidesepal length phenotypic characteristics.The study could provide a theoretical basis for the breeding of new varieties of Oncidium and the selection of hybrid parents.
作者
张叶
叶蓓蕾
邬静
刘乐
黎维诗
郝代成
谢尚潜
凌鹏
ZHANG Ye;YE Beilei;WU Jing;LIU Le;LI Weishi;HAO Daicheng;XIE Shangqian;LING Peng(Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants,Ministry of Edu-cation,Hainan University,Haikou,Hainan 570228,China;Hainan Boda Orchid Technology Co.,Ltd.,Haikou,Hainan 570311,China)
出处
《热带作物学报》
CSCD
北大核心
2021年第8期2183-2190,共8页
Chinese Journal of Tropical Crops
基金
海南省重大科技计划项目(No.ZDKJ201815)。
关键词
文心兰
表型性状
种质资源
遗传多样性
Oncidium
phenotypic trait
germplasm resource
genetic diversity
