摘要
华北落叶松是华北地区重要的生态和造林树种,对其球果表型的研究,对指导良种生产和生态适应性研究具有重要意义。本研究对采自华北落叶松全分布区13个天然群体的7800个球果的12个表型数据进行分析。结果表明,华北落叶松球果表型存在广泛的遗传变异,群体内(45.3%)变异大于群体间(12.38%)的变异。球果质量的变异系数最大,在整个群体中变异幅度高,可育种鳞率的变异系数最小。球果的质量与经度表现出极显著的负相关性,球果长、总种鳞数和高径比与经度呈现显著负相关,质量与纬度也有显著的负相关。主成分分析表明,前4个主成分对总变量累计贡献率为84.7%。通过欧氏距离聚类分析,可将13个群体划分为3个类群。相关性分析表明,基于表型的欧氏距离和地理距离不存在显著的相关性,r值较小。本研究对华北落叶松优良遗传资源收集和利用具有一定的指导意义,为今后的良种生产实践提供了理论支持。
Larix principis-rupprechtii Mayr is an important ecological and afforestation tree species that is distributed in North China.Unlocking the phenotypic variation of its cone is of great significance to provide insights on the production of improved varieties and the study of ecological adaptability.In this study,12 phenotypic traits of 7800 cones,which were collected from 13 natural populations in the entire distribution area of Larix principis-rupprechtii Mayr,were analyzed.Extensive genetic variation was observed,while the intra-population variation(45.3%)was higher than that among the populations(12.38%).The coefficient of variation on cone weight was highest with broad variation range in population,whereas the coefficient of variation on breeding scale rate was lowest.The cone weight showed very significantly negative correlation with longitude,the length of cones,the number of scales and the ratio of length to diameter were significantly negatively correlated with longitude,and the weight was also significantly negatively correlated with latitude.Principal component analysis showed that the first four principal components contributed to 84.7%of phenotypic variations.Thirteen natural populations were classified into three clusters based on Euclidean distance using cluster analysis.No significant correlation was detected between phenotypic distance and geographic distance.Collectively,this work provided information valuable on collection and utilization of excellent genetic resources of Larix principis-rupprechtii Mayr,which has implications for the production of improved varieties in the future.
作者
范英明
董明亮
党磊
张鸿景
齐帅征
赵健
张金凤
FAN Ying-ming;DONG Ming-liang;DANG Lei;ZHANG Hong-jing;QI Shuai-zheng;ZHAO Jian;ZHANG Jin-feng(Beijing Forestry University Advanced Innovation Center for Tree breeding By Molecular Design/National Engineering Laboratory For Tree Breeding,Beijing 100083;Hebei Academy of Forestry and Grassland Sciences,Shijiazhuang 050061)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2021年第6期1531-1541,共11页
Journal of Plant Genetic Resources
基金
中央高校基本科研业务费专项资金资助(2019ZY39)
国家重点研发计划(2017YFD0600404-1)
河北省重点研发计划(20326333D)。
关键词
华北落叶松
球果
变异
Larix principis-rupprechtii Mayr
cones
variation
