| 植物染色体数目及其变异与生境关系初探 |
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| 引用本文： | 王琼,苏智先,宋会兴,汤泽生.植物染色体数目及其变异与生境关系初探[J].生态学杂志,2001,20(5):8-11. |
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| 作者姓名： | 王琼 苏智先 宋会兴 汤泽生 |
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| 作者单位： | 四川师范学院生物多样性研究中心 |
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| 基金项目： | 国家自然科学基金项目(39770134)资助. |
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| 摘 要： | 染色体是基因的载体 ,基因决定生物的性状 ,一定的性状则适应特定的环境。染色体对生物繁衍后代 ,延续种族起着重要的作用。虽然在一定的生境中 ,植物的染色体是恒定的 ,但是大尺度的生境异质性往往导致染色体水平的变异 ,从而增加了物种的遗传多样性。由于一个物种的稳定性和进化潜力依赖其遗传多样性 ,因此保护遗传多样性成为生物多样性保护的最终目的1 ] 。近年来 ,由于分子生态学的兴起 ,目前遗传多样性研究多集中于同工酶遗传多样性、蛋白质多样性、ＤＮＡ序列多样性和基因位点多样性的研究2～8,34～ 36] ,而细胞水平的遗传多样性与…
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| 关 键 词： | 植物 生境 染色体数目 变异 |
| 文章编号： | 1000-4890(2001)05-0008-04 |
The Relationship between
Chromosome Number and its Variation in the Plants and Habitats |
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| Abstract.The Relationship between
Chromosome Number and its Variation in the Plants and Habitats[J].Chinese Journal of Ecology,2001,20(5):8-11. |
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| Authors: | Abstract |
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| Abstract: | Based on the data collected on chromosome number of 1027 species and ecological environment of plants,the relationships between environmental factors and the changing rules of chromosome number,polyploidy,B chromosome were discussed.The results showed that under different light,moisture content and soil conditions,the chromosome number of plant is different in multiformity,variation extent and the highest frequency.The frequency of polyploid is relative to habitats and growing habits.The plant with B chromosome is often distributed over the subtropics and humid environment. |
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| Keywords: | plant chromosome number polyploidy B chromosome ecological factor correlative analysis |
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