Dynamic Genome Evolution of Oryza--A Genus-Wide Comparative Analysis

摘要：

　　Multi-species comparisons in a phylogenetic context improve the sensitivity and precision of evolutionary inference.The genus Oryza consists of more than 20 species and 10 genome types with a robust phylogeny.Comparative sequence analyses across the genus Oryza in three genomic regions,Adhl,Mocl,and Hdl,have provided insight into the genomic evolution of Oryza species.Studies have revealed the maintenance of high gene colinearity in euchromatic regions.Disruptions of microcolinearity are common,some of which have functional consequences.New genes have been created by de novo mechanisms,transposon mediation,and/or duplication and recombination.In natural allotetraploids,the silencing of duplicated genes can be caused by deletions,frameshifting mutations,nonsense mutations,or epigenetic modifications.Future comparative studies of heterochromatin and centromeres will undoubtedly reveal novel features of these cytologically defined genome components.We propose that newgeneration sequencing will promote whole-chromosome and whole-genome comparative studies in Oryza species in the near future.

关键词： Comparative genomics microcolinearity new gene origination allotetraploid heterochromatin

作者: Mingsheng Chen Fei Lu Scott A.Jackson Rod A.Wing

作者单位: State Key Laboratory of Plant Genomics,Institute of Genetics and Developmental Biology,Chinese Acade Department of Agronomy,Purdue University,West Lafayette,IN 47907-2054,USA Arizona Genomics Institute,Department of Plant Sciences,BIO5 Institute,University of Arizona,Tucson,

会议类型: 国际会议

会议名称: The Darwin 200 Beijing International Conference (纪念达尔文诞辰200周年国际学术会议)

会议地点: 北京

会议语种:英文

页码: 76-83

在线出版日期: 2009-10-24（万方平台首次上网日期，不代表论文的发表时间）