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Difference in evolutionary patterns of strongly or weakly selected characters among ant populations

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Title: Difference in evolutionary patterns of strongly or weakly selected characters among ant populations
Authors: Imai, Shuichiro Browse this author
Kobayashi, Kazuya Browse this author
Ohkubo, Yusaku Browse this author
Yagi, Norihiro Browse this author
Hasegawa, Eisuke Browse this author →KAKEN DB
Issue Date: 20-Dec-2016
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 6
Start Page: 39451
Publisher DOI: 10.1038/srep39451
Abstract: Despite being a central issue in evolutionary biology, few studies have examined the stasis of characters in populations with no gene flow. A possible mechanism of such stasis is stabilizing selection with similar peaks in each population. This study examined the evolutionary patterns of morphological characters with and without strong selection in ant populations. We show that compared to a character that seems to be less important, characters that are more important were less variable within and among populations. Microsatellite analyses showed significant genetic differences between populations, implying limited gene flow between them. The observed levels of genetic differentiation cannot be attributed to recent population separations. Thus, the observed differences in morphological variance seem to reflect the degree of selection on each character. The less important character changed proportionately with time, but such a pattern was not observed in more important characters. These results suggest that stabilizing selection maintains morphological stasis between populations of the same species with minimal gene flow independent of divergence times.
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長谷川 英祐

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