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The evolution of between‐species reproductive interference capability under different within‐species mating regimes
Author(s) -
Kyogoku Daisuke,
Sota Teiji
Publication year - 2017
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/evo.13359
Subject(s) - biology , callosobruchus chinensis , mating , allopatric speciation , sexual selection , ecology , zoology , interspecific competition , experimental evolution , population , genetics , demography , sociology , gene
Sexual selection sometimes favors male traits that benefit their bearers, but harm their mates. The harmful effects of male traits may also extend to females of other species via heterospecific mating interactions. This could affect the coexistence of closely related species during secondary contact. We examined the evolution of the interspecific interfering capability of a beetle ( Callosobruchus chinensis ) with a congener ( C . maculatus ) using C . chinensis males reared under conditions of monogamy and polygamy for 17 generations. After experimental evolution, C . chinensis males reared under polygamous conditions imposed greater impacts on offspring production by C. maculatus females than did C . chinensis males reared under monogamous conditions. However, the mechanism by which differential mating regimes altered the effect of C . chinensis males on C. maculatus females was unclear, because we did not find evidence for the expected genital evolution in C. chinensis , despite their body size divergence. Our findings suggest that traits that originally evolved through sexual selection in two allopatric species could influence the coexistence of these species or the likelihood of reinforcement during secondary contact.