草地学报

草地学报 ›› 2019, Vol. 27 ›› Issue (1): 274-278.DOI: 10.11733/j.issn.1007-0435.2019.01.036

• 研究专报 • 上一篇    

海南及粤西外来入侵植物假臭草染色体核型分析

张颖1,2, 黎丽倩2, 刘强2   

  1. 1. 岭南师范学院, 生命科学与技术学院, 广东 湛江 524048;
    2. 海南师范大学生命科学学院, 热带岛屿生态学教育部重点实验室, 海南 海口 571158
  • 收稿日期:2018-10-16 修回日期:2019-01-18 出版日期:2019-02-15 发布日期:2019-04-13
  • 通讯作者: 刘强,E-mail:hnsylq@163.com
  • 作者简介:张颖(1977-),女,黑龙江五常人,博士,教授,硕导,主要从事岛屿生态学和濒危红树植物保护研究,E-mail:zhangyingred@lingnan.edu.cn
  • 基金资助:
    国家自然科学基金项目（31060095）；海口市应用技术研究与开发经费专项项目（2017052）资助

Genetic Diversity of the Invasive Plant Praxelis clematidea Populations in Hainan Island and Western Guangdong Province Based on Chromosome Karyotype

ZHANG Ying1,2, LI Li-qian2, LIU Qiang2   

  1. 1. Life Science and Technology School, Lingnan Normal University, Zhanjiang, Guangdong Province 524048, China;
    2. Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou, Hainan Province 571158, China
  • Received:2018-10-16 Revised:2019-01-18 Online:2019-02-15 Published:2019-04-13

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摘要： 对海南岛及粤西地区8个样区，3种生境（旷野、林缘和林中）假臭草（Praxelis clematidea）的染色体核型进行分析。结果表明，染色体均为二倍体，染色体数目2n=28。染色体核型表现为2A，2B，3B和3A。核型属较不对称类型，不同居群假臭草的居群亲缘关系与地理分布不完全一致，说明假臭草在入侵和传播过程中受到环境因子和人为干扰的影响较大。

关键词: 入侵杂草, 假臭草, 核型分析, 亲缘关系

Abstract: The karyotypes of Praxelis clematidea were analyzed in three habitats (the wilderness,forest margin and forest) in eight plots in Hainan Island and western Guangdong. The results showed that diploid have the chromosome number 2n=28 was determined for all the populations in eight sampling sites. The karyotypes are 2A,2B,3B and 3A. The karyotype is a more asymmetrical type,and the population affinities and geographical distribution of different populations are not completely consistent,indicating that the false odor grass is greatly affected by environmental factors and human disturbance during the invasion and propagation.

Key words: Invasive weed, Praxelis clematidea, Karyotype analysis, Genetic relationship

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