银额果蝇（Drosophila albomicans）自然群体的 mtDNA 多态性研究
文献类型：学位论文
| 作者 | 王文 |
| 学位类别 | 硕士 |
| 答辩日期 | 1992 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 北京 |
| 导师 | 施立明 |
| 关键词 | 银额果蝇 自然群体 mtDNA多态性 群体结构 群体演化 |
| 中文摘要 | 本文以8种限制性内切酶探讨银额果蝇自然群体中的mtDNA多态性。在来自8个群体的82个单雌系中，共检出34种限制性类型，对其中的每一个类型都进行了酶谱定位。运用了包括UPG法在内的几种数据处理方法，以分析各限制性类型之间、各群体之间的遗传关系。结合有关资料，可以得出以下结论：1）银额果蝇mtDNA分子在碱基组成和功能区域两方面都受到了选择压力的影响。2）银额果蝇群体内的多态程度较高，从而在一定程度上掩盖了群体间差异。3）银额果蝇可能起源于马来西亚和加里曼丹岛一带。最初分成东西两支向北扩散，西支在中南半岛北部又分成两支，从而形成了现生银额果蝇群体东部、中部、西部的地理分布模式。 |
| 英文摘要 | mtDNA polymorphism in natural populations of D.albomicans was studied with 8 restriction endonucleases. Thirty-four restriction nucleomorphs were detected among 82 isofemale lines from 8 populations, each of which was mapped for the 8 enzymes. Several methods, including UPG, were used to analyse the genetic relationships either among nucleomorphs or among populations. Combining our result with other references, following conclusion can be deduced: 1) Both the base constitution and the functional regions of this mtDNA molecular have been constrained during evolution. 2) There exists high intrapopulation polymorphism in D. albomicans, and this polymorphism can conceal the difference between populations to some extent. 3) D.albomicans may originated around Malaysia and Kanlimantan island. At early stage, the ancestral population divided into two lineages, eastern and western population, both of which expanded towards north. Then, the western lineage diverged into two sublineages again when it reached the North of the Middle-South Penisula. Thereby, the pattern of geographic distribution was constructed in D.albomicans after the two differentiations, according to which the extant populations of D.albomicans can be distinguished into three geographic populations, namely, the eastern, the middle and the western. |
| 语种 | 中文 |
| 公开日期 | 2010-10-15 |
| 源URL | [http://159.226.149.42:8088/handle/152453/6220]  |
| 专题 | 昆明动物研究所_基因起源组 |
| 推荐引用方式 GB/T 7714 | 王文. 银额果蝇（Drosophila albomicans）自然群体的 mtDNA 多态性研究[D]. 北京. 中国科学院研究生院. 1992. |
入库方式： OAI收割
来源：昆明动物研究所
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