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Phylogenetic relationships of Triticum and Aegilops and evidence for the origin of the A, B, and D genomes of common wheat (Triticum aestivum).
Mol Phylogenet Evol. 2006 Apr; 39(1):70-82.MP

Abstract

Common wheat (Triticum aestivum) has for decades been a textbook example of the evolution of a major crop species by allopolyploidization. Using a sophisticated extension of the PCR technique, we have successfully isolated two single-copy nuclear genes, DMC1 and EF-G, from each of the three genomes found in hexaploid wheat (BA(u)D) and from the two genomes of the tetraploid progenitor Triticum turgidum (BA(u)). By subjecting these sequences to phylogenetic analysis together with sequences from representatives of all the diploid Triticeae genera we are able for the first time to provide simultaneous and strongly supported evidence for the D genome being derived from Aegilops tauschii, the A(u) genome being derived from Triticum urartu, and the hitherto enigmatic B genome being derived from Aegilops speltoides. Previous problems of identifying the B genome donor may be associated with a higher diversification rate of the B genome compared to the A(u) genome in the polyploid wheats. The phylogenetic hypothesis further suggests that neither Triticum, Aegilops, nor Triticum plus Aegilops are monophyletic.

Authors+Show Affiliations

Botanical Garden and Museum, The Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83, DK-1307 Copenhagen K, Denmark. gittep@snm.ku.dkNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16504543

Citation

Petersen, Gitte, et al. "Phylogenetic Relationships of Triticum and Aegilops and Evidence for the Origin of the A, B, and D Genomes of Common Wheat (Triticum Aestivum)." Molecular Phylogenetics and Evolution, vol. 39, no. 1, 2006, pp. 70-82.
Petersen G, Seberg O, Yde M, et al. Phylogenetic relationships of Triticum and Aegilops and evidence for the origin of the A, B, and D genomes of common wheat (Triticum aestivum). Mol Phylogenet Evol. 2006;39(1):70-82.
Petersen, G., Seberg, O., Yde, M., & Berthelsen, K. (2006). Phylogenetic relationships of Triticum and Aegilops and evidence for the origin of the A, B, and D genomes of common wheat (Triticum aestivum). Molecular Phylogenetics and Evolution, 39(1), 70-82.
Petersen G, et al. Phylogenetic Relationships of Triticum and Aegilops and Evidence for the Origin of the A, B, and D Genomes of Common Wheat (Triticum Aestivum). Mol Phylogenet Evol. 2006;39(1):70-82. PubMed PMID: 16504543.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phylogenetic relationships of Triticum and Aegilops and evidence for the origin of the A, B, and D genomes of common wheat (Triticum aestivum). AU - Petersen,Gitte, AU - Seberg,Ole, AU - Yde,Merete, AU - Berthelsen,Kasper, Y1 - 2006/02/28/ PY - 2005/05/17/received PY - 2005/12/08/revised PY - 2006/01/12/accepted PY - 2006/3/1/pubmed PY - 2006/5/19/medline PY - 2006/3/1/entrez SP - 70 EP - 82 JF - Molecular phylogenetics and evolution JO - Mol. Phylogenet. Evol. VL - 39 IS - 1 N2 - Common wheat (Triticum aestivum) has for decades been a textbook example of the evolution of a major crop species by allopolyploidization. Using a sophisticated extension of the PCR technique, we have successfully isolated two single-copy nuclear genes, DMC1 and EF-G, from each of the three genomes found in hexaploid wheat (BA(u)D) and from the two genomes of the tetraploid progenitor Triticum turgidum (BA(u)). By subjecting these sequences to phylogenetic analysis together with sequences from representatives of all the diploid Triticeae genera we are able for the first time to provide simultaneous and strongly supported evidence for the D genome being derived from Aegilops tauschii, the A(u) genome being derived from Triticum urartu, and the hitherto enigmatic B genome being derived from Aegilops speltoides. Previous problems of identifying the B genome donor may be associated with a higher diversification rate of the B genome compared to the A(u) genome in the polyploid wheats. The phylogenetic hypothesis further suggests that neither Triticum, Aegilops, nor Triticum plus Aegilops are monophyletic. SN - 1055-7903 UR - https://www.unboundmedicine.com/medline/citation/16504543/Phylogenetic_relationships_of_Triticum_and_Aegilops_and_evidence_for_the_origin_of_the_A_B_and_D_genomes_of_common_wheat__Triticum_aestivum__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1055-7903(06)00027-3 DB - PRIME DP - Unbound Medicine ER -