两种安息香属植物的染色体核型分析  

Karyotype analysis of chromosome in two species of Styrax

作　　者：刘彤 汪涛涌 徐莹 阮羽清 唐明 LIU Tong;WANG Taoyong;XU Ying;RUAN Yuqing;TANG Ming(Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species,Jiangxi Agricultural University,Nanchang 330045,China;Jiangxi Shangrao Forestry Research Institute,Shangrao Jiangxi 334001,China;Xiang zhong Normol College For Preschool Education,Shaoyang Hunan 422000,China)

机构地区：[1]江西农业大学江西乡土树种良种选育与高效利用江西省重点实验室,江西南昌330045 [2]上饶市林业科学研究所,江西上饶334001 [3]湘中幼儿师范高等专科学校,湖南邵阳422000

出　　处：《南昌大学学报(理科版)》2025年第2期128-133,共6页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(31960043)。

摘　　要：为探讨国产安息香属不同系两种安息香属植物的染色体核型差异,揭示其分类学和系统学价值。采用植物常规压片法获取了中华安息香和中越安息香的根尖染色体装片并分析了其核型。结果表明:中华安息香染色体数为2n=2x=40,核型公式为2n=40=32m+8sm,染色体的相对长度为2.97~6.79,最长染色体和最短染色体的比值(Lt/St)为2.59,核型为1B型;中越安息香的染色体数为2n=2x=16,核型公式为2n=16=16m,相对长度为9.39~15.61,最长染色体和最短染色体的比值(Lt/St)为1.79,核型为1A型。中华安息香的最长染色体和最短染色体的比值、核型不对称系数均大于中越安息香,表明中华安息香进化程度更高。To explore the chromosomal karyotype differences of two different strains of the genus Styrax in China,and to reveal their taxonomic and systematic value,chromosome karyotypes of Styrax chinensis and S.finlaysonianus were studied by the traditional squashed method.The results showed that the chromosome number of S.chinensis was 2n=2x=40,with its karyogram being 2n=40=32 m+8 sm,its chromosome relative length being 2.67~6.86,and the ratio of its longest chromosome to the shortest chromosome being 2.59,thus its karyotype was 1B.The chromosome number of S.finlaysonianus was 2n=2x=16,with its karyogram being 2n=16=16 m,its chromosome relative length being 9.07~15.65,and the ratio of its longest chromosome to the shortest chromosome being 1.79,thus its karyotype was 1A.Due to the lager ratio of the longest chromosome to the shortest chromosome,and the karyotype asymmetry coefficient in S.chinensis being greater than those in S.finlaysonianus,it can be concluded that S.chinensis has a higher evolution degree than that of S.finlaysonianus.

关 键 词：染色体 压片法 细胞学 核型分析 安息香属 

分 类 号：S718.4[农业科学—林学]