中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 变叶海棠物种复合体的分类界定和遗传分化初探 园艺学报 2014,41 (5) 957-966
Position: Home > Articles > Species Delimitation and Preliminary Studies of Genetic Divergence of Malus toringoides Species Complex Acta Horticulturae Sinica 2014,41 (5) 957-966

变叶海棠物种复合体的分类界定和遗传分化初探

作  者：
唐亮;李菊;谭飔;马香;周志钦
单  位：
西南大学南方山地园艺学教育部重点实验室
关键词：
变叶海棠;物种复合体;物种界定;遗传分化;单拷贝核基因
摘  要：
在根据系统发育分析探明变叶海棠物种复合体6个类群遗传来源的基础上,使用单拷贝核基因SbeⅠ进一步研究其分类界定和居群遗传分化。结果表明,SbeⅠ基因的最大似然树由3个大的进化枝构成,物种界定分析将这3个进化枝界定为3个物种,但是变叶海棠物种复合体中的类群除花叶海棠外,均不能被界定为物种。基于遗传距离和固定指数的遗传分化研究支持分类界定的结果。同一进化枝类群内和类群间的遗传距离在分布范围上完全重叠(0～0.006),并且小于不同进化枝类群间的遗传距离(0.008～0.016)。固定指数分析与遗传距离计算结果一致,表明同一进化枝中的类群彼此遗传分化很小,不支持将其界定为物种。根据分类界定和遗传分化研究结果以及复合体类群的遗传来源,建议把多毛海棠作为变叶海棠的变型处理,将马尔康海棠和小金海棠作为复合体的单个无融合生殖种处理。
译  名：
Species Delimitation and Preliminary Studies of Genetic Divergence of Malus toringoides Species Complex
作  者：
TANG Liang;LI Ju;TAN Si;MA Xiang;ZHOU Zhi-qin;Key Laboratory of Horticulture Science for Southern Mountainous Regions,Ministry of Education;College of Horticulture and Landscape Architecture,Southwest University;
关键词：
Malus toringoides;;species complex;;species delimitation;;genetic divergence;;single-copy nuclear gene
摘  要：
Based on the elucidation of genetic origins of taxa in the Malus toringoides species complex,species delimitation and genetic divergence of this species complex were studied using single-copy nuclear gene SbeⅠ.There are three main clades on the maximum likelihood tree constructed with SbeⅠ.Species delimitation analyses indicated that the three clades correspond to three species.However,taxa within the three clades cannot be delimited as species except M.transitoria.The results of species delimitation were further supported by the estimation of genetic distance and fixed index.Within a clade,the range of genetic distances(0–0.006)between sequences from the same taxa is overlapped with those from different taxa.While genetic distances(0.008–0.016)between sequences from different clades are larger than those from the same clade.The estimation of fixed index is consistent with the estimated genetic distance.These analyses showed that the genetic divergence between taxa within a clade is rather small,and taxa within the same clade shouldn't be delimited as species.Based on the results of species delimitation,the estimation of genetic divergence,and the genetic origin of taxa in the M.toringoides species complex,it would be better to recognize M.× setok as the variant of M.× toringoides,and to recognize M.× maerkangensis and M.× xiaojinensis as a single agamospeciesin the species complex.Species delimitation in the M.toringoides species complex could shed light on the utilization and protection of wild resource in genus Malus.

相似文章

导出引用
计量
文章访问数: 7
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46