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Genome evolution due to allopolyploidization in wheat.
Genetics. 2012 Nov; 192(3):763-74.G

Abstract

The wheat group has evolved through allopolyploidization, namely, through hybridization among species from the plant genera Aegilops and Triticum followed by genome doubling. This speciation process has been associated with ecogeographical expansion and with domestication. In the past few decades, we have searched for explanations for this impressive success. Our studies attempted to probe the bases for the wide genetic variation characterizing these species, which accounts for their great adaptability and colonizing ability. Central to our work was the investigation of how allopolyploidization alters genome structure and expression. We found in wheat that allopolyploidy accelerated genome evolution in two ways: (1) it triggered rapid genome alterations through the instantaneous generation of a variety of cardinal genetic and epigenetic changes (which we termed "revolutionary" changes), and (2) it facilitated sporadic genomic changes throughout the species' evolution (i.e., evolutionary changes), which are not attainable at the diploid level. Our major findings in natural and synthetic allopolyploid wheat indicate that these alterations have led to the cytological and genetic diploidization of the allopolyploids. These genetic and epigenetic changes reflect the dynamic structural and functional plasticity of the allopolyploid wheat genome. The significance of this plasticity for the successful establishment of wheat allopolyploids, in nature and under domestication, is discussed.

Authors+Show Affiliations

Department of Plant Sciences, The Weizmann Institute of Science, Rehovot 76100, Israel. moshe.feldman@weizmann.ac.ilNo affiliation info available

Pub Type(s)

Journal Article
Review

Language

eng

PubMed ID

23135324

Citation

Feldman, Moshe, and Avraham A. Levy. "Genome Evolution Due to Allopolyploidization in Wheat." Genetics, vol. 192, no. 3, 2012, pp. 763-74.
Feldman M, Levy AA. Genome evolution due to allopolyploidization in wheat. Genetics. 2012;192(3):763-74.
Feldman, M., & Levy, A. A. (2012). Genome evolution due to allopolyploidization in wheat. Genetics, 192(3), 763-74. https://doi.org/10.1534/genetics.112.146316
Feldman M, Levy AA. Genome Evolution Due to Allopolyploidization in Wheat. Genetics. 2012;192(3):763-74. PubMed PMID: 23135324.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genome evolution due to allopolyploidization in wheat. AU - Feldman,Moshe, AU - Levy,Avraham A, PY - 2012/11/9/entrez PY - 2012/11/9/pubmed PY - 2013/4/24/medline SP - 763 EP - 74 JF - Genetics JO - Genetics VL - 192 IS - 3 N2 - The wheat group has evolved through allopolyploidization, namely, through hybridization among species from the plant genera Aegilops and Triticum followed by genome doubling. This speciation process has been associated with ecogeographical expansion and with domestication. In the past few decades, we have searched for explanations for this impressive success. Our studies attempted to probe the bases for the wide genetic variation characterizing these species, which accounts for their great adaptability and colonizing ability. Central to our work was the investigation of how allopolyploidization alters genome structure and expression. We found in wheat that allopolyploidy accelerated genome evolution in two ways: (1) it triggered rapid genome alterations through the instantaneous generation of a variety of cardinal genetic and epigenetic changes (which we termed "revolutionary" changes), and (2) it facilitated sporadic genomic changes throughout the species' evolution (i.e., evolutionary changes), which are not attainable at the diploid level. Our major findings in natural and synthetic allopolyploid wheat indicate that these alterations have led to the cytological and genetic diploidization of the allopolyploids. These genetic and epigenetic changes reflect the dynamic structural and functional plasticity of the allopolyploid wheat genome. The significance of this plasticity for the successful establishment of wheat allopolyploids, in nature and under domestication, is discussed. SN - 1943-2631 UR - https://www.unboundmedicine.com/medline/citation/23135324/Genome_evolution_due_to_allopolyploidization_in_wheat_ L2 - http://www.genetics.org/cgi/pmidlookup?view=long&pmid=23135324 DB - PRIME DP - Unbound Medicine ER -