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Self and non-self recognition affects clonal reproduction and competition in the pea aphid

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Title: Self and non-self recognition affects clonal reproduction and competition in the pea aphid
Authors: Li, Yang Browse this author
Akimoto, Shin-ichi Browse this author →KAKEN DB
Keywords: Acyrthosiphon pisum
colour mutant
density-dependent effect
reproductive restraint
Issue Date: 2021
Publisher: Royal Society
Journal Title: Proceedings of the royal society b-biological sciences
Volume: 288
Issue: 1953
Start Page: 20210787
Publisher DOI: 10.1098/rspb.2021.0787
Abstract: The spatial interaction of clonal organisms is an unsolved but crucial topic in evolutionary biology. We evaluated the interactions between aphid clones using a colour mutant (yellow) and an original (green) clone. Colonies founded by two aphids of the same clone and mixed colonies, founded by a green aphid and a yellow aphid, were set up to observe population growth for 15 days. We confirmed positive competition effects, with mixed colonies increasing in size more rapidly than clonal colonies. In mixed colonies where reproduction started simultaneously, green aphids overwhelmed yellow aphids in number, and yellow aphids restrained reproduction. However, when yellow aphids started to reproduce earlier, they outnumbered the green aphids. To test whether aphids have the ability to control reproduction according to the densities of self and non-self clones, one yellow aphid or one antennae-excised yellow aphid was transferred into a highly dense green clone colony. Intact yellow aphids produced fewer nymphs in crowded green colonies, whereas the fecundity of antennae-excised aphids did not change. Thus, we conclude that aphid clones can discriminate between self and non-self clones, and can regulate their reproduction, depending on whether they are superior or inferior in number to their competitors.
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)

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