Dosage, duplication, and diploidization: clarifying the interplay of multiple models for duplicate gene evolution over time

被引:203
|
作者
Conant, Gavin C. [1 ,2 ]
Birchler, James A. [3 ]
Pires, J. Chris [2 ,3 ]
机构
[1] Univ Missouri, Div Anim Sci, Columbia, MO 65211 USA
[2] Univ Missouri, Inst Informat, Columbia, MO 65211 USA
[3] Univ Missouri, Div Biol Sci, Columbia, MO 65211 USA
关键词
WHOLE-GENOME DUPLICATION; BALANCE HYPOTHESIS; SACCHAROMYCES-CEREVISIAE; COPY-NUMBER; SMALL-SCALE; SELECTION; ARABIDOPSIS; SUBFUNCTIONALIZATION; NEOFUNCTIONALIZATION; CONSEQUENCES;
D O I
10.1016/j.pbi.2014.05.008
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Requirements to maintain dosage balance shape many genome-scale patterns in organisms, including the resolution of whole genome duplications (WGD), as well as the varied effects of aneuploidy, segmental duplications, tandem duplications, gene copy number variations (CNV), and epigenetic marks. Like neofunctionalization and subfunctionalization, the impact of absolute and relative dosage varies over time. These variations are of particular importance in understanding the role of dosage in the evolution of polyploid organisms. Numerous investigations have found the consequences of polyploidy remain distinct from small-scale duplications (SSD). This observation is significant as all flowering plants have experienced at least two ancient polyploid events, and many angiosperm lineages have undergone additional rounds of polyploidy. Intriguingly, recent studies indicate a link between how epigenetic marks in recent allopolyploids may induce immediate changes in gene expression and the longer-term patterns of biased fractionation and chromosomal evolution. We argue that dosage effects represent one aspect of an emerging pluralistic framework, a framework that will use biophysics, genomic technologies, and systems-level models of cells to broaden our view of how genomes evolve.
引用
收藏
页码:91 / 98
页数:8
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