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论文题目: Reciprocal genomic evolution in the ant-fungus agricultural symbiosis
作者: Sanne Nygaard*; Haofu Hu; Cai Li; Morten Schi?tt; Zhensheng Chen; Zhikai Yang; Qiaolin Xie; Chunyu Ma; Yuan Deng; Rebecca B. Dikow; Christian Rabeling; David R. Nash; William T. Wcislo; Sea ′n G. Brady; Ted R. Schultz; Guojie Zhang*; Jacobus J.Boomsma*
联系作者: sanne@bio.ku.dk; guojie.zhang@bio.ku.dk; jjboomsma@bio.ku.dk
外单位作者单位:
发表年度: 2016
卷: 7
期:
页码: e1223
摘要: The attine ant-fungus agricultural symbiosis evolved over tens of millions of years, producing complex societies with industrial-scale farming analogous to that of humans. Here we document reciprocal shifts in the genomes and transcriptomes of seven fungus-farming ant species and their fungal cultivars. We show that ant subsistence farming probably originated in the early Tertiary (55-60 MYA), followed by further transitions to the farming of fully domesticated cultivars and leaf-cutting, both arising earlier than previously estimated. Evolutionary modifications in the ants include unprecedented rates of genome-wide structural rearrangement, early loss of arginine biosynthesis and positive selection on chitinase pathways. Modifications of fungal cultivars include loss of a key ligninase domain, changes in chitin synthesis and a reduction in carbohydrate-degrading enzymes as the ants gradually transitioned to functional herbivory. In contrast to human farming, increasing dependence on a single cultivar lineage appears to have been essential to the origin of industrial-scale ant agriculture.
刊物名称: Nature Communications
论文出处: http://www.nature.com/articles/ncomms12233
影响因子: 11.329 (2015)