caa a22 4500 386392927 CHVBK 20180307112125.0 cr unu---uuuuu 161130e198902 xx s 000 0 eng 10.1017/S0016672300027798 doi S0016672300027798 pii (NATIONALLICENCE)cambridge-10.1017/S0016672300027798 The accumulation of P-elements on the tip of the X chromosome in populations of Drosophila melanogaster [Elektronische Daten] Little information exists about the mechanisms that determine the fate of mobile elements in natural populations. In this study we catalogue the distribution of 638 P-elements across 114 X chromosomes in samples drawn from three natural populations of Drosophila melanogaster. There is an extremely high occurrence of elements at the tip relative to the rest of the euchromatic chromosome. We demonstrate that the distribution of de novo insertions of the P-element on a specific laboratory chromosome is markedly different; no P-elements were recovered at the tip in the 243 insertion events recorded. In contrast, insertion data for the π2 chromosome suggests an elevated rate associated with the tip site although it does not appear sufficient to explain the large differential accumulation on wild chromosomes. This raises the issue of inter chromosome (or tip) variation in relative rates, as well as the possibility that rates of elimination are lower at the tip. Copyright © Cambridge University Press 1989 Ajioka James W. Department of Ecology and Evolution, State University of New York, Stony Brook, N.Y. 11794, USA Eanes Walter F. Department of Ecology and Evolution, State University of New York, Stony Brook, N.Y. 11794, USA Genetical Research Cambridge University Press 53/1(1989-02), 1-6 0016-6723 53:1<1 1989 53 GRH https://doi.org/10.1017/S0016672300027798 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0016672300027798 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ajioka James W. Department of Ecology and Evolution, State University of New York, Stony Brook, N.Y. 11794, USA NATIONALLICENCE 700 1- Eanes Walter F. Department of Ecology and Evolution, State University of New York, Stony Brook, N.Y. 11794, USA NATIONALLICENCE 773 0- Genetical Research Cambridge University Press 53/1(1989-02), 1-6 0016-6723 53:1<1 1989 53 GRH CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge