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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 42, No. 2, 2021, pp. 195-206
Bioline Code: zr21023
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 42, No. 2, 2021, pp. 195-206

 en Comparative transcriptomics highlights convergent evolution of energy metabolic pathways in group-living spiders
Yang, Han; Lyu, Bin; Yin, Hai-Qiang & Li, Shu-Qiang

Abstract

Although widely thought to be aggressive, solitary, and potentially cannibalistic, some spider species have evolved group-living behaviors. The distinct transition provides the framework to uncover group-living evolution. Here, we conducted a comparative transcriptomic study and examined patterns of molecular evolution in two independently evolved group-living spiders and twelve solitary species. We report that positively selected genes among group-living spider lineages are significantly enriched in nutrient metabolism and autophagy pathways. We also show that nutrient-related genes of group-living spiders convergently experience amino acid substitutions and accelerated relative evolutionary rates. These results indicate adaptive convergence of nutrient metabolism that may ensure energy supply in group-living spiders. The decelerated evolutionary rate of autophagy-related genes in group-living lineages is consistent with an increased constraint on energy homeostasis as would be required in a group-living environment. Together, the results show that energy metabolic pathways play an important role in the transition to group-living in spiders.

Keywords
Autophagy; Cannibalism; Convergent; Group-living; Nutrient; Spider

 
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