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| 生物入侵种喜旱莲子草的染色体核型特征 | |
| 引用本文： | 蔡华,韦朝领,陈妮.生物入侵种喜旱莲子草的染色体核型特征[J].热带作物学报,2009,30(4):530-534. |
| 作者姓名： | 蔡华 韦朝领 陈妮 |
| 作者单位： | 1. 滁州学院化学与生命科学系,滁州,239000 2. 安徽农业大学茶与食品科技学院,合肥,230036 3. 安徽科技学院生命科学学院,凤阳,233100 |
| 基金项目： | 国家自然科学基金，安徽省教育厅自然科学研究项目，安徽省高校青年教师科研计划，滁州学院引进人才项目 |
| 摘 要： | 对外来人侵植物喜旱莲子草(Atlernanthera philoxeroides)的染色体核型进行了分析.结果表明,该入侵种的染色体数为2n=96,属六倍体物种,各染色体间形态差异不明显,均为中着丝粒或近中着丝粒染色体,最长与最短染色体相对长度比为2.10,全套染色体未见随体,核型公式为2n=96=60 m+36 sm,核型类型为进化程度较高的2B型.喜旱莲子草的多倍性特征及2B核型为其生物入侵性提供了重要的细胞学证据,文中同时提出不改变基因组DNA序列结构的表观遗传变异可能是喜旱莲子草成功入侵的重要机制. |
| 关 键 词： | 喜旱莲子草 染色体 多倍性 入侵性 表观遗传变异 |
Chromosome Karyotype Characters of Biological Invasion in Alternanthera Philoxeroides |
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| Cai Hu,Wei Chaoling and Chen Ni.Chromosome Karyotype Characters of Biological Invasion in Alternanthera Philoxeroides[J].Chinese Journal of Tropical Crops,2009,30(4):530-534. | |
| Authors: | Cai Hu Wei Chaoling and Chen Ni |
| Institution: | Cai Hua1,Wei Chaoling2,Chen Ni3 1 Department of Chemistry , Life Science,Chuzhou University,Chuzhou 239000,2 College of Tea , Food Science , Technology,Anhui Agricultural University,Hefei 230036,3 College of Life Science,Anhui Science , Technology University,Fengyang 233100 |
| Abstract: | The chromosome karyotypes of alien invasive species Alternanthera philoxeroides were observed and analyzed through root tips squash technology. The chromosome number is 2n=96, belonging to hexaploid species (2n=6x=96), and the morphological difference is not obvious among the 96 chromosomes. All the chromosomes are metacentric and submetacentric. Relative length ratio of the longest to the shortest chromosomes is 2.10. There is no satellite chromosome in all the 96 chromosomes. The karyotype formula is 2n=9... |
| Keywords: | Alternanthera philoxeroides chromosomes polyploid invasiveness epigenetic variation |
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