Polyploidy and its effect on evolutionary success: old questions revisited with new tools
TLDR
How the integration of recent genomic developments with ecological, physiological and evolutionary perspectives has contributed to addressing unresolved problems about the role of polyploidy is explored and there is 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.Abstract:
Polyploidy, 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.read more
Citations
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Journal ArticleDOI
The evolutionary significance of polyploidy
TL;DR: How, once polyploidy has been established, the unique retention profile of duplicated genes following whole-genome duplication might explain key longer-term evolutionary transitions and a general increase in biological complexity is discussed.
Journal ArticleDOI
Polyploidy and genome evolution in plants
TL;DR: Mechanisms of diploidization, evidence of genome reorganization in recently formed polyploid species, and macroevolutionary patterns of WGD in plant genomes are considered and it is proposed that the ongoing genomic changes observed in recent polyploids may illustrate the di ploidization processes that result in ancient signatures of W GD over geological timescales.
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Genome sequence of mungbean and insights into evolution within Vigna species
Yang Jae Kang,Sue K. Kim,Moon Young Kim,Puji Lestari,Kil Hyun Kim,Bo-Keun Ha,Tae-Hwan Jun,Won Joo Hwang,Taeyoung Lee,Jayern Lee,Sangrea Shim,Minyoung Yoon,Young Eun Jang,Kwang Soo Han,Puntaree Taeprayoon,Na Rae Yoon,Prakit Somta,Patcharin Tanya,Kwang Soo Kim,Jae-Gyun Gwag,Jung-Kyung Moon,Yeong-Ho Lee,Beom-Seok Park,Aureliano Bombarely,Jeff J. Doyle,Scott A. Jackson,Roland Schafleitner,Peerasak Srinives,Rajeev K. Varshney,Suk-Ha Lee +29 more
TL;DR: A draft genome sequence of mungbean is constructed to facilitate genome research into the subgenus Ceratotropis, which includes several important dietary legumes in Asia, and to enable a better understanding of the evolution of leguminous species.
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Recent progress and challenges in population genetics of polyploid organisms: an overview of current state-of-the-art molecular and statistical tools.
TL;DR: For advancing the field of polyploid population genetics, most priority should be given to development of new molecular approaches that allow efficient dosage determination, and to further development of analytical approaches to circumvent dosage uncertainty and to accommodate ‘flexible’ modes of inheritance.
Journal ArticleDOI
mRNA and Small RNA Transcriptomes Reveal Insights into Dynamic Homoeolog Regulation of Allopolyploid Heterosis in Nascent Hexaploid Wheat
Aili Li,Dengcai Liu,Jun Wu,Xubo Zhao,Ming Hao,Shuaifeng Geng,Jun Yan,Xiaoxue Jiang,Lianquan Zhang,Junyan Wu,Lingjie Yin,Rongzhi Zhang,Liang Wu,You-Liang Zheng,Long Mao +14 more
TL;DR: This work shows that, in addition to nonadditive expression, parental expression-level dominance of subgenomes in nascent allohexaploid wheat may contribute distinctively to heterosis through dynamic small RNA–mediated homoeolog regulations.
References
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Journal ArticleDOI
Variation and Evolution in Plants.
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