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Color polymorphism in an aphid is maintained by attending ants

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/66286

Title: Color polymorphism in an aphid is maintained by attending ants
Authors: Watanabe, S. Browse this author
Murakami, T. Browse this author
Yoshimura, J. Browse this author
Hasegawa, E. Browse this author →KAKEN DB
Keywords: Polymorphism
ant attendance
aphids
balancing selection
color morphs
frequency dependent selection
Issue Date: 7-Sep-2016
Publisher: American Association for the Advancement of Science
Journal Title: Science Advances
Volume: 2
Issue: 9
Start Page: e1600606
Publisher DOI: 10.1126/sciadv.1600606
PMID: 27617289
Abstract: The study of polymorphisms is particularly informative for enhancing our understanding of phenotypic and genetic diversity. The persistence of polymorphism in a population is generally explained by balancing selection. Color polymorphisms that are often found in many insects and arthropods are prime examples of the maintenance of polymorphisms via balancing selection. In some aphids, color morphs are maintained through frequency-dependent predation by two predatory insects. However, the presence of color polymorphism in ant-attended aphids cannot be explained by traditional balancing selection because these aphids are free from predation. We examined the selective advantages of the existence of two color (red and green) morphs in the ant-attended aphid, Macrosiphoniella yomogicola, in fields. We measured the degree of ant attendance on aphid colonies with different proportions of color morphs. The results show that the ants strongly favor aphid colonies with intermediate proportions of the two color morphs. The relationship between the degree of ant attendance and the proportion of color morphs in the field is convex when aphid colony size and ant colony size are controlled. This function has a peak of approximately 65% of green morphs in a colony. This system represents the first case of a balancing polymorphism that is not maintained by opposing factors but by a symbiotic relationship.
Rights: https://creativecommons.org/licenses/by-nc/4.0/
Type: article
URI: http://hdl.handle.net/2115/66286
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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