2014
DOI: 10.1146/annurev-genet-120213-092159
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Nonadditive Gene Expression in Polyploids

Abstract: Allopolyploidy involves hybridization and duplication of divergent parental genomes and provides new avenues for gene expression. The expression levels of duplicated genes in polyploids can show deviation from parental additivity (the arithmetic average of the parental expression levels). Nonadditive expression has been widely observed in diverse polyploids and comprises at least three possible scenarios: (a) The total gene expression level in a polyploid is similar to that of one of its parents (expression-le… Show more

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Cited by 191 publications
(234 citation statements)
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References 200 publications
(326 reference statements)
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“…While the processes of sub-, neo-, or nonfunctionalization drive the divergence of paralog pairs, the gene dosage balance hypothesis may explain why some paralog pairs have retained similar expression profiles (Yoo et al, 2014). Interestingly, a high proportion of the paralog pairs with similar profiles were found among the 5% most abundant transcripts in our data set (51%, P = 5e-92).…”
Section: A Majority Of Paralogs Show Differential Expression During Wmentioning
confidence: 74%
“…While the processes of sub-, neo-, or nonfunctionalization drive the divergence of paralog pairs, the gene dosage balance hypothesis may explain why some paralog pairs have retained similar expression profiles (Yoo et al, 2014). Interestingly, a high proportion of the paralog pairs with similar profiles were found among the 5% most abundant transcripts in our data set (51%, P = 5e-92).…”
Section: A Majority Of Paralogs Show Differential Expression During Wmentioning
confidence: 74%
“…Non-additive expression in allopolyploids has been variously described as transcriptome dominance [43], bias [44], nucleolar dominance (in reference to rRNA genes; [45]), genome dominance [42,46] and homeologue expression bias [47]. The factors contributing to these patterns-and what the patterns themselves represent-are complex, as is the terminology [23,47]. However, it is clear that biased expression in allopolyploids, when summed over [48,49] and coffee [50] focused not only on global gene expression patterns in allopolyploids relative to their parental species in a genome-wide manner, but also on how homeologue expression bias is linked to expression-level dominance.…”
Section: (C) Novelty In Gene Expressionmentioning
confidence: 99%
“…Initial investigations of AS in relation to gene and genome duplication in plants have focused on Arabidopsis [70], Brassica napus [71] and wheat [72]. Additional studies of the role of AS in generating novel isoforms in polyploids are needed; for further information on AS in polyploids, see Yoo et al [23].…”
Section: (C) Novelty In Gene Expressionmentioning
confidence: 99%
“…In particular, heritable alterations in gene expression including overall transgressive expression and homeolog-expression bias (Grover et al 2012;Yoo et al 2013) have been observed in all studied cases of allopolyploidization including diverse plants (Yoo et al 2014). These heritable changes in gene expression have been suggested as responsible for the emergent phenotypic novelties required by the nascent allopolyploids to survive and establish at the onset stages, and also as novel sources of variation for natural and human selections to act upon (Hegarty et al 2006;Gaeta et al 2007;Doyle et al 2008;Akhunova et al 2010;Jackson and Chen 2010;Chagué et al 2010;Buggs et al 2011;Qi et al 2012;Li et al 2014;Pfeifer et al 2014;Yoo et al 2014).…”
Section: Introductionmentioning
confidence: 98%