伞形科囊瓣芹属2种类的核型分析  

Karyotype analysis of two species in Pternopetalum Franch.of Apiaceae

作　　者：李慧敏 周伟[1] 宋春凤[1] LI Huimin;ZHOU Wei;SONG Chunfeng(Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China)

机构地区：[1]江苏省中国科学院植物研究所(南京中山植物园)江苏省植物资源研究与利用重点实验室,江苏南京210014

出　　处：《植物资源与环境学报》2021年第1期69-71,共3页Journal of Plant Resources and Environment

基　　金：江苏省自然科学基金项目(BK20200294);江苏省植物资源研究与利用重点实验室开放基金项目(JSPKLB201834,JSPKLB201923);江苏省中国科学院植物研究所博士人才科研启动基金项目(JSPKLB202016)。

摘　　要：囊瓣芹属(Pternopetalum Franch.)是伞形科(Apiaceae)芹亚科(Apioideae)的大属之一,全世界有20~30种[1]39,[2]85。中国有23种,其中19种为特有种,集中分布于四川西部、云南西北部和西藏东南部的横断山区[3]。该属种类的小伞形花序常具2或3朵花,且花瓣基部肿大成囊状,这2个显著的形态学特征使得囊瓣芹属植物在伞形科内较易识别,被众多学者认为是较为自然的类群[2]86,[4-5]。Chromosomal karyotypes in root tip cells of Pternopetalum botrychioides(Dunn)Hand.-Mazz.and P.latipinnulatum(Shan)J.B.Tan et X.J.He in Pternopetalum Franch.of Apiaceae were analyzed by using pressing flake method.The results show that chromosome length of P.botrychioides and P.latipinnulatum is 2.60-4.89 and 2.97-4.42μm,respectively,and total length of their genome is 117.60 and 122.06μm,respectively;their chromosome numbers are both 33,basic chromosome numbers are both x=11,karyotype formulas are both 2n=3x=21m+9sm+3st,and karyotype asymmetries are both 2A type.The significance of classification and basic chromosome number of P.botrychioides and P.latipinnulatum in grouping of species in Pternopetalum is discussed based on the research results.

关 键 词：伞形科 囊瓣芹属 散血芹 宽叶散血芹 染色体基数 核型分析 

分 类 号：Q786[生物学—分子生物学] Q949.763.3[生物学—植物学]