Epigenetic regulation of flowering time in polyploids

Mayfield, Dustin; Chen, Z Jeffrey; Pires, J. Chris

doi:10.1016/j.pbi.2011.03.008

Cited by 37 publications

(31 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Epigenetic changes in the form of altered DNA methylation have also been shown to accompany allopolyploidization in newly formed wheat allopolyploids (Liu et al 1998b;Shaked et al 2001;Shitsukawa et al 2007;Zhao et al 2011), as in other studied allopolyploid plants (Madlung et al 2002;Salmon et al 2005;Lukens et al 2006;Gaeta et al 2007;Parisod et al 2009;Xu et al 2009;Mayfield et al 2011;Hu et al 2013;Madlung and Wendel 2013;Diez et al 2014). Therefore, both genetic and epigenetic changes and their intertwined interactions should have underpinned genome evolution in polyploid wheat.…”

Section: Discussionmentioning

confidence: 94%

Genetic and epigenetic modifications to the BBAA component of common wheat during its evolutionary history at the hexaploid level

et al. 2015

View full text Add to dashboard Cite

The formation and evolution of common wheat (Triticum aestivum L., genome BBAADD) involves allopolyploidization events at two ploidy levels. Whether the two ploidy levels (tetraploidy and hexaploidy) have impacted the BBAA subgenomes differentially remains largely unknown. We have reported recently that extensive and distinct modifications of transcriptome expression occurred to the BBAA component of common wheat relative to the evolution of gene expression at the tetraploid level in Triticum turgidum. As a step further, here we analyzed the genetic and cytosine DNA methylation differences between an extracted tetraploid wheat (ETW) harboring genome BBAA that is highly similar to the BBAA subgenomes of common wheat, and a set of diverse T. turgidum collections, including both wild and cultivated genotypes. We found that while ETW had no significantly altered karyotype from T. turgidum, it diverged substantially from the later at both the nucleotide sequence level and in DNA methylation based on molecular marker assay of randomly sampled loci across the genome. In particular, ETW is globally less cytosine-methylated than T. turgidum, consistent with earlier observations of a generally higher transcriptome expression level in ETW than in T. turgidum. Together, our results suggest that genome evolution at the allohexaploid level has caused extensive genetic and DNA methylation modifications to the BBAA subgenomes of common wheat, which are distinctive from those accumulated at the tetraploid level in both wild and cultivated T. turgidum genotypes.

show abstract

Section: Discussionmentioning

confidence: 94%

Genetic and epigenetic modifications to the BBAA component of common wheat during its evolutionary history at the hexaploid level

et al. 2015

View full text Add to dashboard Cite

show abstract

“…There has been a long-standing debate over the evolutionary implications of genome doubling (Winge, 1917;Müntzing, 1936;Ohno, 1970;Comai, 2005;Otto, 2007;Soltis and Soltis, 2009), which span the spectrum from polyploidy being an evolutionary dead end (Stebbins, 1950;Arrigo and Barker, 2012) to polyploidy being a mayor player with a significant role in evolution (Ohno, 1970;Chen, 2010;Mayfield et al, 2011).…”

Section: Is Polyploidy Advantageous For Evolutionary Success?mentioning

confidence: 99%

“…Triploid individuals are then less likely to be viable, or if they are viable, they are less likely to be fertile (Levin, 1975). Finally, changes in polyploids that can be either advantageous or detrimental are the altered transcriptome, genomic architecture and epigenetic landscape, which can lead to gene silencing or activation, as well as DNA loss and epigenetic changes (Wang et al, 2004(Wang et al, , 2006Hegarty et al, 2006;Gaeta et al, 2007Gaeta et al, , 2009Chaudhary et al, 2009;Pumphrey et al, 2009;Rapp et al, 2009;Wright et al, 2009;Buggs et al, 2010Buggs et al, , 2011Hegarty et al, 2011;Mayfield et al, 2011;Xiong et al, 2011;Matsushita et al, 2012). In the new polyploid such changes can lead to reduced, additive or transgressive states.…”

Section: Is Polyploidy Advantageous For Evolutionary Success?mentioning

confidence: 99%

Polyploidy and its effect on evolutionary success: old questions revisited with new tools

2012

View full text Add to dashboard Cite

A MadlungPolyploidy, the condition of possessing more than two complete genomes in a cell, has intrigued biologists for almost a century. Polyploidy is found in many plants and some animal species and today we know that polyploidy has had a role in the evolution of all angiosperms. Despite its widespread occurrence, the direct effect of polyploidy on evolutionary success of a species is still largely unknown. Over the years many attractive hypotheses have been proposed in an attempt to assign functionality to the increased content of a duplicated genome. Among these hypotheses are the proposal that genome doubling confers distinct advantages to a polyploid and that these advantages allow polyploids to thrive in environments that pose challenges to the polyploid's diploid progenitors. This article revisits these long-standing questions and explores how the integration of recent genomic developments with ecological, physiological and evolutionary perspectives has contributed to addressing unresolved problems about the role of polyploidy. Although unsatisfactory, the current conclusion has to be that despite significant progress, there still isn't enough information to unequivocally answer many unresolved questions about cause and effect of polyploidy on evolutionary success of a species. There is, however, reason to believe that the increasingly integrative approaches discussed here should allow us in the future to make more direct connections between the effects of polyploidy on the genome and the responses this condition elicits from the organism living in its natural environment.

show abstract

“…Over the past 2 decades, genomic, epigenetic and cytogenetic analyses have repeatedly validated McClintock's predictions in many allopolyploid systems [for some recent reviews see Hufton and Panopoulou, 2009;Jackson and Chen, 2010;Mayfield et al, 2011;De Smet and Van de Peer, 2012;Heslop-Harrison, 2012;Soltis and Soltis, 2012]. Specifically, polyploidization has been associated with sequence loss [Shaked et al, 2001;Ozkan et al, 2003;Han et al, 2005;Tate et al, 2009], changes in epigenetic marks, such as cytosine methylation [Shaked et al, 2001;Madlung et al, 2005;Lavania et al, 2012], the activation of transposons [Kashkush et al, 2003;Madlung et al, 2005;Chen et al, 2008;Kraitshtein et al, 2010;Petit et al, 2010;Hegarty et al, 2011], and recombination between homoeologous chromosomes [Gaeta and Pires, 2010;Salmon et al, 2010;Szadkowski et al, 2010].…”

Section: Structural Genome Changes During Polyploidizationmentioning

confidence: 99%

“…Many recent reviews have addressed the foregoing questions [Chen, 2010;Cifuentes et al, 2010;Gaeta and Pires, 2010;Parisod et al, 2010a, b;Mayfield et al, 2011]. One aspect that has received comparatively less attention is the question of whether or not variation in transcription between individuals represents heritable and potentially significant variation, or if instead offspring of the same parental crosses have similar transcriptomic profiles.…”

Section: Effects Of Polyploidy On Gene Expressionmentioning

confidence: 99%

Genetic and Epigenetic Aspects of Polyploid Evolution in Plants

Madlung

Wendel

2013

Cytogenet Genome Res

146

141

View full text Add to dashboard Cite

Polyploidy, the condition of possessing more than 2 complete chromosome sets in the same nucleus, is frequent in nature and has implications for a species' prospects for evolution. Newly formed polyploids, so-called neopolyploids, undergo a wide spectrum of genomic changes upon genome merger and duplication. Here, we review recent literature describing genomic and transcriptomic changes along the pathway from neoallopolyploid formation to the stabilization of species and diversification at the allopolyploid level. We begin by reviewing pathways of polyploid formation and discuss the effects of genome doubling and hybridization on chromosome pairing. We then review our knowledge of epigenetic changes in allopolyploids, followed by a consideration of the effects of these structural genomic and epigenetic changes on the transcriptional activity of genes in allopolyploids. We discuss the effects of changes in gene expression in polyploids with respect to current evolutionary theory. Finally, we draw attention to the general question of the relationships between genomic and transcriptomic alteration and incipient diversification among sibling polyploid lines and populations.

show abstract

Epigenetic regulation of flowering time in polyploids

Cited by 37 publications

References 40 publications

Genetic and epigenetic modifications to the BBAA component of common wheat during its evolutionary history at the hexaploid level

Genetic and epigenetic modifications to the BBAA component of common wheat during its evolutionary history at the hexaploid level

Polyploidy and its effect on evolutionary success: old questions revisited with new tools

Genetic and Epigenetic Aspects of Polyploid Evolution in Plants

Contact Info

Product

Resources

About