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No mate preference associated with the supergene controlling social organization in Alpine silver ants
Author(s) -
Avril Amaury,
Zahnd Sacha,
Djordjevic Jelisaveta,
Chapuisat Michel
Publication year - 2019
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1111/jeb.13479
Subject(s) - biology , supergene (geology) , assortative mating , mating , evolutionary biology , mate choice , mating system , zoology , preference , ecology , polygyny , offspring , genetics , demography , mineral , population , microeconomics , economics , pregnancy , sociology
Abstract Disassortative mating is a powerful mechanism stabilizing polymorphisms at sex chromosomes and other supergenes. The Alpine silver ant, Formica selysi , has two forms of social organization—single‐queen and multiple‐queen colonies—determined by alternate haplotypes at a large supergene. Here, we explore whether mate preference contributes to the maintenance of the genetic polymorphism at the social supergene. With mate choice experiments, we found that females and males mated randomly with respect to social form. Moreover, queens were able to produce offspring irrespective of whether they had mated with a male from the same or the alternative social form. Yet, females originating from single‐queen colonies were more fertile, suggesting that they may be more successful at independent colony founding. We conclude that the pattern of asymmetric assortative mating documented from mature F. selysi colonies in the field is not caused by mate preferences or major genetic incompatibilities between social forms. More generally, we found no evidence that disassortative mate preference contributes to the maintenance of polymorphism at this supergene controlling ant social organization.