硫华菊不同品种核型分析  

Karyotype Analysis of Different Varieties of Cosmos sulphureus

作　　者：孙桂芳 杨建伟 赵艺璇 刘冬云[2] SUN Guifang;YANG Jianwei;ZHAO Yixuan;LIU Dongyun(The County Housing and Urban-Rural Development Bureau of Xinglong County,Xinglong 067300,China;College of Landscape and Travel,Agricultural University of Hebei,Baoding 071000,China;The Urban Management Comprehensive Administrative Law Enforcement Bureau of Xinglong County,Xinglong 067300,China)

机构地区：[1]河北省兴隆县住房和城乡建设局,河北兴隆067300 [2]河北农业大学园林与旅游学院,河北保定071000 [3]河北省兴隆县城市管理综合行政执法局,河北兴隆067300

出　　处：《西北民族大学学报（自然科学版）》2024年第4期25-30,共6页Journal of Northwest Minzu University(Natural Science)

基　　金：河北省科技厅项目(17226320D)。

摘　　要：采用常规压片法,以硫华菊的8个品种为研究材料,对其染色体数目进行观察及核型分析,旨在为硫华菊的资源收集、起源分析、良种培育提供必要的依据.供实验硫华菊的染色体数目均为2n=24,染色体数目稳定;核型类型为3B和2A型;最长与最短染色体比值范围为1.37~2.30,臂比大于2∶1的染色体占比是25%~58.33%;核型不对称系数范围为60.38%~67.10%,推测硫华菊的进化程度较高,其中‘优雅’的进化程度最高.The chromosome number was observed and karyological analyses on eight cultivars of Cosmos sulphureus were carried out with conventional pressed slice method.These provided necessary evidence for the resource collection,origin analysis and cultivation of good varieties for Cosmos sulphureus.The result:The chromosome number of Cosmos sulphureus for the test was stable,each cultivars of Cosmos sulphureus was mostly 2n=24;The karyotype types were 3B and 2A;The ratio between the longest chromosome and the shortest chromosome was from 1.37 to 2.30.The percentage of chromosomes of arm ratio over 2∶1 was 25%~58.33%;The karyotype asymmetry indexes(As.K)of eight cultivars were from 60.38%to 67.10%,which implied the karyotype of Cosmos sulphureus was morer evolution,the‘Youya’karyotype of which was the most evolutive.

关 键 词：硫华菊 染色体 核型分析 核型进化 

分 类 号：S153[农业科学—土壤学]