小葱(Allium ascalonicum L.)的染色体多态性研究  

Chromosomal Diversity of Allium ascalonicum L.

作　　者：陈玲玲[1] 张珍珍[1] 赵露露[1] 梁莉[2] 敖成齐[2] 

机构地区：[1]温州大学瓯江学院,浙江温州325035 [2]温州大学生命与环境科学学院,浙江温州325035

出　　处：《热带作物学报》2011年第12期2209-2213,共5页Chinese Journal of Tropical Crops

基　　金：温州大学实验室开放项目(No.11SK65A)

摘　　要：对小葱一个种群的38个个体进行染色体计数和核型分析。共发现5种核型,除核型具有多态性外,笔者还发现非整倍体和B染色体。在这一种群中,3个个体的染色体组型是2n=2x=12m+2sm+2st(2SAT),17个个体的染色体组型是2n=2x=14m+2st(2SAT),7个个体的染色体组型是2n=2x=12m+2sm+2st+1B,5个个体的染色体组型是2n=13m+2st(2SAT),6个个体的染色体组型是2n=10m+2m(2SAT)+2sm+1st。并对小葱染色体多态性的成因进行讨论。In this study, somatic chromosomes were counted and the karyotypes were determined in 38 individuals from a population of Allium ascalonicum L. Five karyotypes were found, 2n=2x=12m＋2sm＋2st （2SAT）for 3 individuals, 2n=2x=14m＋2st （2SAT）for 17 individuals, 2n=2x=12m＋2sm＋2st＋lB for 7 individuals, 2n=13m＋2st （2SAT）for 5 individuals, 2n=10m＋2m（2SAT）＋2sm＋lst for 6 individuals. Chromosomal diversity in A. ascalonicum, including aneuploid and B chromosome was found and its possible causes were explained.

关 键 词：小葱 染色体数 核型 非整倍体 B染色体 

分 类 号：Q949.718.2[生物学—植物学]