新疆农业科学2012，Vol.49Issue(12)：2276-2279,4.DOI:10.6048/j.issn.1001-4330.2012.12.020
荒漠十字花科植物粗果庭芥的核型分析
Karyotype Analysis of the Desert Cruciferous Plant Alyssum asycarpum Steph.ex Willd.
摘要
Abstract
[Objective] To analyze the karyotype characteristics of cruciferous plant Alyssum dasycarpum Steph. ex Willd. from the desert area in Xinjiang. [ Method]The somatic cells of root - tips from this species as experimental materials were used to observe the chromosome number, karyotype and ploidy characteristic by root - tip squashing method. [ Result] The chromosome number is 2n = 16; The basic chromosome number is confirmed to be x =8; And this species is diploid; All of them are metacentric (m) chromosomes; The ratio of the longest chromosome to the shortest chromosome (Lc/Sc) is 2.283; The percentage of chromosomes with arm ratio (P. C. A) >2 is 0; the karyotype formula of this species is 2n = 2x = 16 = 16m, which belongs to "1B" type of Stebbins karyotype classification; And the index of the karyotype asymmetry ( As. K% ) is 57.07% and is lower than 60% , so the karyotype symmetry of this species is higher; The satellite on the chromosome of this species is never found in the process of the karyotype analysis. [ Conclusion ] These results revealed karyotype of Alyssum dasycarpum is symmetrical to a higher degree, indicating that Alyssum dasycarpum belongs to a relatively primitive type and relatively old or the original plant in evolutionary processes.关键词
粗果庭芥/染色体/核型分析Key words
Alyssum dasycarpum Steph. ex Willd/ Chromosome/ Karyotype分类
农业科技引用本文复制引用
李玲,赵恩峰,曾幼玲..荒漠十字花科植物粗果庭芥的核型分析[J].新疆农业科学,2012,49(12):2276-2279,4.基金项目
新疆维吾尔自治区高校科研计划项目(XJEDU2011102) （XJEDU2011102）
新疆生物资源基因工程重点实验室开放课题(XJDX0201-2012-06) （XJDX0201-2012-06）
