Molecular characteristics of diverse populations are consistent with the hypothesis of a recent invasion of Drosophila melanogaster by mobile P elements.
Molecular characteristics of diverse populations are consistent with the hypothesis of a recent invasion of Drosophila melanogaster by mobile P elements.
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不同种群的分子特征与最近移动 P 元素入侵黑腹果蝇的假设一致。
DOI：
10.1093/oxfordjournals.molbev.a040491
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发表时间：
1988
影响因子：
10.7
通讯作者：
Periquet,G
中科院分区：
文献类型：
--
作者：
Anxolabéhère,D;Kidwell,MG;Periquet,G
通过使用两种来自全尺寸P元件内部区域的分子探针，对来自黑腹果蝇自然种群的大约100个菌株进行了P元件序列存在或不存在的测试。对过去60年中不同时期从几个大陆收集的菌株进行了检查。最古老的可用菌株，代表世界上最主要的地理区域，表现出没有可检测到的P-元件探针杂交。与此相反，所有最近收集的自然种群进行了测试进行P-元件序列。P元素最早出现于20世纪50年代和60年代初在美洲以及20世纪60年代末在其他大陆的收集中。最年轻的菌株是完全缺乏P元素起源于人口采样在20世纪60年代中期在美国，但直到1974年在人口从苏联。来自不同地理区域的群体与两种P-元件探针的杂交模式存在差异。这些差异与这些群体的不同P-M表型特性一致。结合以往的表型检测结果，现有的证据与D.在过去的30年中，黑腹果蝇的数量增加，并表明美洲的假定入侵可能比欧洲，非洲和世界其他地区早大约十年。
Approximately 100 strains derived from natural populations of Drosophila melanogaster were tested for the presence or absence of P-element sequences by using two molecular probes derived from internal regions of a full-sized P element. Strains that had been collected from several continents at varying times during the past 60 years were examined. The oldest available strains, representing most major geographical regions of the world, exhibited no detectable hybridization to the P-element probes. In contrast, all recently collected natural populations that were tested carried P-element sequences. The earliest appearance of P elements occurred in collections made during the 1950s and early 1960s in the Americas and during the late 1960s on other continents. The youngest strains that were completely devoid of P elements originated in populations sampled during the mid-1960s in America, but as late as 1974 in populations from the USSR. There are differences in the patterns of hybridization to the two P-element probes between populations from different geographical regions. These differences are consistent with the varying P-M phenotypic properties of these populations. Taken together with the results of phenotypic tests reported in earlier studies, the available evidence is consistent with the hypothesis of a worldwide P-element invasion of D. melanogaster during the past 30 years and suggests that the putative invasion of the Americas possibly preceded by approximately a decade that in Europe, Africa, and the rest of the world.