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Gene family evolution in green plants with emphasis on the origination and evolution of Arabidopsis thaliana genes.
MedLine Citation:
PMID:  23216999     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Gene family size variation is an important mechanism that shapes the natural variation for adaptation in various species. Despite its importance, the pattern of gene family size variation is still not well understood in green plants. Especially the evolutionary pattern of genes and gene families remains unknown in the model plant Arabidopsis thaliana in the context of green plants. In this study, eight representative genomes of green plants are sampled to study gene family evolution and characterize the origination of A. thaliana genes, respectively. Four important insights gained are that (i) the rate of gene gains and losses is about 0.001359 per gene every million years, similar to the rate in yeast, Drosophila, and mammals; (ii) some gene families evolved rapidly with extreme expansions or contractions, and 2745 gene families present in all the eight species represent the "core" proteome of green plants; (iii) 70% of A. thaliana genes could be traced back to 450 million years ago; (iv) intriguingly, A. thaliana genes with early origination are under stronger purifying selection and more conserved. In summary, the present study provides genome-wide insights into evolutionary history and mechanisms of genes and gene families in green plants and especially in A. thaliana. © 2012 The Authors. The Plant Journal © 2012 Blackwell Publishing Ltd.
Authors:
Ya-Long Guo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-6
Journal Detail:
Title:  The Plant journal : for cell and molecular biology     Volume:  -     ISSN:  1365-313X     ISO Abbreviation:  Plant J.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9207397     Medline TA:  Plant J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Authors. The Plant Journal © 2012 Blackwell Publishing Ltd.
Affiliation:
State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; Department of Molecular Biology, Max Planck Institute for Developmental Biology, 72076, Tübingen, Germany.
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