A gene copy number arms race in action: X,Y-chromosome transmission distortion across a species barrier.

Autor:	Baird SJE; Institute of Vertebrate Biology, Czech Academy of Sciences, Research Facility in Studenec, Brno, Czech Republic., Hiadlovská Z; Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic., Daniszová K; Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic., Piálek J; Institute of Vertebrate Biology, Czech Academy of Sciences, Research Facility in Studenec, Brno, Czech Republic., Macholán M; Laboratory of Mammalian Evolutionary Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czech Republic.; Department of Botany and Zoology, Masaryk University, Brno, Czech Republic.
Jazyk:	angličtina
Zdroj:	Evolution; international journal of organic evolution [Evolution] 2023 Jun 01; Vol. 77 (6), pp. 1330-1340.
DOI:	10.1093/evolut/qpad051
Abstrakt:	A remarkable gene copy number (CN) arms race system has recently been described in laboratory mice, where Slx;Slxl1 and Sly genes compete over transmission by altering the fertilization success of X and Y chromosome-bearing sperm, respectively. Here, we focus on this system in nature, where natural selection can counter CN/gene product escalation. Our model is house mouse subspecies hybridizing in Europe. In some regions, Y chromosomes of the Eastern subspecies have introgressed onto Western genomic backgrounds, accompanied by sex ratio distortion in favor of males, consistent with the inbred lines suggested mechanism: Overabundance of SLY protein expressed by invading Y chromosomes. We take Slx as representative of the X side of this arms race and measure Slx|Sly CN and expression across an "Invasion" transect where Ys introgress and a "Control" transect with negligible introgression. Since we found similar Slx|Sly ratios in both transects, SLY overabundance is unlikely to explain the introgression. However, Slx CN is relatively low in the introgression area, suggesting that Slx is less able to combat Sly effects here. Furthermore, deterministic changes in Slx;Sly expression proportions versus CN proportions suggest standing variation for trans regulation of Slx|Sly is being co-opted in nature where their arms race reduces population fitness. (© The Author(s) 2023. Published by Oxford University Press on behalf of The Society for the Study of Evolution (SSE). All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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