Rarely successful polyploids and their legacy in plant genomes

被引:211
作者
Arrigo, Nils [1 ]
Barker, Michael S. [1 ]
机构
[1] Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ 85721 USA
基金
瑞士国家科学基金会;
关键词
FLOWERING PLANTS; EVOLUTIONARY CONSEQUENCES; PHYLOGENETIC ANALYSIS; DOSAGE-SENSITIVITY; GENE DUPLICATIONS; VASCULAR PLANTS; WHOLE-GENOME; ESTABLISHMENT; ARABIDOPSIS; SPECIATION;
D O I
10.1016/j.pbi.2012.03.010
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Polyploidy, or whole genome duplication, is recognized as an important feature of eukaryotic genome evolution. Among eukaryotes, polyploidy has probably had the largest evolutionary impact on vascular plants where many contemporary species are of recent polyploid origin. Genomic analyses have uncovered evidence of at least one round of polyploidy in the ancestry of most plants, fueling speculation that genome duplications lead to increases in net diversity. In spite of the frequency of ancient polyploidy, recent analyses have found that recently formed polyploid species have higher extinction rates than their diploid relatives. These results suggest that despite leaving a substantial legacy in plant genomes, only rare polyploids survive over the long term and most are evolutionary dead-ends.
引用
收藏
页码:140 / 146
页数:7
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