globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0151059
论文题名:
Phylogenomics and Divergence Dating of Fungus-Farming Ants (Hymenoptera: Formicidae) of the Genera Sericomyrmex and Apterostigma
作者: Ana Ješovnik; Vanessa L. González; Ted R. Schultz
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2016
发表日期: 2016-7-28
卷: 11, 期:7
语种: 英语
英文关键词: Ants ; Transcriptome analysis ; Fungal genetics ; Paleogenetics ; Fungal genomics ; Arginine ; BLAST algorithm ; Invertebrate genomics
英文摘要: Fungus-farming ("attine") ants are model systems for studies of symbiosis, coevolution, and advanced eusociality. A New World clade of nearly 300 species in 15 genera, all attine ants cultivate fungal symbionts for food. In order to better understand the evolution of ant agriculture, we sequenced, assembled, and analyzed transcriptomes of four different attine ant species in two genera: three species in the higher-attine genus Sericomyrmex and a single lower-attine ant species, Apterostigma megacephala, representing the first genomic data for either genus. These data were combined with published genomes of nine other ant species and the honey bee Apis mellifera for phylogenomic and divergence-dating analyses. The resulting phylogeny confirms relationships inferred in previous studies of fungus-farming ants. Divergence-dating analyses recovered slightly older dates than most prior analyses, estimating that attine ants originated 53.6–66.7 million of years ago, and recovered a very long branch subtending a very recent, rapid radiation of the genus Sericomyrmex. This result is further confirmed by a separate analysis of the three Sericomyrmex species, which reveals that 92.71% of orthologs have 99% - 100% pairwise-identical nucleotide sequences. We searched the transcriptomes for genes of interest, most importantly argininosuccinate synthase and argininosuccinate lyase, which are functional in other ants but which are known to have been lost in seven previously studied attine ant species. Loss of the ability to produce the amino acid arginine has been hypothesized to contribute to the obligate dependence of attine ants upon their cultivated fungi, but the point in fungus-farming ant evolution at which these losses occurred has remained unknown. We did not find these genes in any of the sequenced transcriptomes. Although expected for Sericomyrmex species, the absence of arginine anabolic genes in the lower-attine ant Apterostigma megacephala strongly suggests that the loss coincided with the origin of attine ants.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0151059&type=printable
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/23938
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
journal.pone.0151059.PDF(1131KB)期刊论文作者接受稿开放获取View Download

作者单位: Entomology Department, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia, United States of America;Maryland Center for Systematic Entomology, Department of Entomology, University of Maryland, College Park, Maryland, United States of America;Global Genome Initiative, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia, United States of America;Entomology Department, National Museum of Natural History, Smithsonian Institution, Washington, District of Columbia, United States of America

Recommended Citation:
Ana Ješovnik,Vanessa L. González,Ted R. Schultz. Phylogenomics and Divergence Dating of Fungus-Farming Ants (Hymenoptera: Formicidae) of the Genera Sericomyrmex and Apterostigma[J]. PLOS ONE,2016-01-01,11(7)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Ana Ješovnik]'s Articles
[Vanessa L. González]'s Articles
[Ted R. Schultz]'s Articles
百度学术
Similar articles in Baidu Scholar
[Ana Ješovnik]'s Articles
[Vanessa L. González]'s Articles
[Ted R. Schultz]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Ana Ješovnik]‘s Articles
[Vanessa L. González]‘s Articles
[Ted R. Schultz]‘s Articles
Related Copyright Policies
Null
收藏/分享
文件名: journal.pone.0151059.PDF
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.