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Postcopulatory sexual selection is associated with accelerated evolution of sperm morphology
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SYSNO ASEP 0441942 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Postcopulatory sexual selection is associated with accelerated evolution of sperm morphology Tvůrce(i) Rowe, M. (NO)
Albrecht, Tomáš (UBO-W) RID, SAI, ORCID
Cramer, E. R. A. (NO)
Johnsen, A. (NO)
Laskemoen, T. (NO)
Weir, J. T. (CA)
Lifjeld, J. T. (NO)Celkový počet autorů 7 Zdroj.dok. Evolution. - : Wiley - ISSN 0014-3820
Roč. 69, č. 4 (2015), s. 1044-1052Poč.str. 9 Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova birds ; evolutionary diversification ; evolutionary rate ; passerine ; sperm competition Vědní obor RIV EG - Zoologie CEP GAP506/12/2472 GA ČR - Grantová agentura ČR Institucionální podpora UBO-W - RVO:68081766 UT WOS 000353236000017 EID SCOPUS 84927911150 DOI 10.1111/evo.12620 Anotace Rapid diversification of sexual traits is frequently attributed to sexual selection, though explicit tests of this hypothesis remain limited. Spermatozoa exhibit remarkable variability in size and shape, and studies report a correlation between sperm morphology (sperm length and shape) and sperm competition risk or female reproductive tract morphology. However, whether postcopulatory processes (e.g. sperm competition and cryptic female choice) influence the speed of evolutionary diversification in sperm form is unknown. Using passerine birds, we quantified evolutionary rates of sperm length divergence among lineages (i.e. species pairs) and determined whether these rates varied with the level of sperm competition (estimated as relative testes mass). We found that relative testes mass was significantly and positively associated with more rapid phenotypic divergence in sperm midpiece and flagellum lengths, as well as total sperm length. In contrast, there was no association between relative testes mass and rates of evolutionary divergence in sperm head size, and models suggested that head length is evolutionarily constrained. Our results are the first to show an association between the strength of sperm competition and the speed of sperm evolution, and suggest that postcopulatory sexual selection promotes rapid evolutionary diversification of sperm morphology. Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2016
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