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Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum/Aegilops complex and the evolutionary history of polyploid wheat.
Proc Natl Acad Sci U S A. 2002 Jun 11; 99(12):8133-8.PN

Abstract

The classic wheat evolutionary history is one of adaptive radiation of the diploid Triticum/Aegilops species (A, S, D), genome convergence and divergence of the tetraploid (Triticum turgidum AABB, and Triticum timopheevii AAGG) and hexaploid (Triticum aestivum, AABBDD) species. We analyzed Acc-1 (plastid acetyl-CoA carboxylase) and Pgk-1 (plastid 3-phosphoglycerate kinase) genes to determine phylogenetic relationships among Triticum and Aegilops species of the wheat lineage and to establish the timeline of wheat evolution based on gene sequence comparisons. Triticum urartu was confirmed as the A genome donor of tetraploid and hexaploid wheat. The A genome of polyploid wheat diverged from T. urartu less than half a million years ago (MYA), indicating a relatively recent origin of polyploid wheat. The D genome sequences of T. aestivum and Aegilops tauschii are identical, confirming that T. aestivum arose from hybridization of T. turgidum and Ae. tauschii only 8,000 years ago. The diploid Triticum and Aegilops progenitors of the A, B, D, G, and S genomes all radiated 2.5-4.5 MYA. Our data suggest that the Acc-1 and Pgk-1 loci have different histories in different lineages, indicating genome mosaicity and significant intraspecific differentiation. Some loci of the S genome of Aegilops speltoides and the G genome of T. timophevii are closely related, suggesting the same origin of some parts of their genomes. None of the Aegilops genomes analyzed is a close relative of the B genome, so the diploid progenitor of the B genome remains unknown.

Authors+Show Affiliations

Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo 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

12060759

Citation

Huang, Shaoxing, et al. "Genes Encoding Plastid acetyl-CoA Carboxylase and 3-phosphoglycerate Kinase of the Triticum/Aegilops Complex and the Evolutionary History of Polyploid Wheat." Proceedings of the National Academy of Sciences of the United States of America, vol. 99, no. 12, 2002, pp. 8133-8.
Huang S, Sirikhachornkit A, Su X, et al. Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum/Aegilops complex and the evolutionary history of polyploid wheat. Proc Natl Acad Sci USA. 2002;99(12):8133-8.
Huang, S., Sirikhachornkit, A., Su, X., Faris, J., Gill, B., Haselkorn, R., & Gornicki, P. (2002). Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum/Aegilops complex and the evolutionary history of polyploid wheat. Proceedings of the National Academy of Sciences of the United States of America, 99(12), 8133-8.
Huang S, et al. Genes Encoding Plastid acetyl-CoA Carboxylase and 3-phosphoglycerate Kinase of the Triticum/Aegilops Complex and the Evolutionary History of Polyploid Wheat. Proc Natl Acad Sci USA. 2002 Jun 11;99(12):8133-8. PubMed PMID: 12060759.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genes encoding plastid acetyl-CoA carboxylase and 3-phosphoglycerate kinase of the Triticum/Aegilops complex and the evolutionary history of polyploid wheat. AU - Huang,Shaoxing, AU - Sirikhachornkit,Anchalee, AU - Su,Xiujuan, AU - Faris,Justin, AU - Gill,Bikram, AU - Haselkorn,Robert, AU - Gornicki,Piotr, PY - 2002/6/13/pubmed PY - 2002/8/3/medline PY - 2002/6/13/entrez SP - 8133 EP - 8 JF - Proceedings of the National Academy of Sciences of the United States of America JO - Proc. Natl. Acad. Sci. U.S.A. VL - 99 IS - 12 N2 - The classic wheat evolutionary history is one of adaptive radiation of the diploid Triticum/Aegilops species (A, S, D), genome convergence and divergence of the tetraploid (Triticum turgidum AABB, and Triticum timopheevii AAGG) and hexaploid (Triticum aestivum, AABBDD) species. We analyzed Acc-1 (plastid acetyl-CoA carboxylase) and Pgk-1 (plastid 3-phosphoglycerate kinase) genes to determine phylogenetic relationships among Triticum and Aegilops species of the wheat lineage and to establish the timeline of wheat evolution based on gene sequence comparisons. Triticum urartu was confirmed as the A genome donor of tetraploid and hexaploid wheat. The A genome of polyploid wheat diverged from T. urartu less than half a million years ago (MYA), indicating a relatively recent origin of polyploid wheat. The D genome sequences of T. aestivum and Aegilops tauschii are identical, confirming that T. aestivum arose from hybridization of T. turgidum and Ae. tauschii only 8,000 years ago. The diploid Triticum and Aegilops progenitors of the A, B, D, G, and S genomes all radiated 2.5-4.5 MYA. Our data suggest that the Acc-1 and Pgk-1 loci have different histories in different lineages, indicating genome mosaicity and significant intraspecific differentiation. Some loci of the S genome of Aegilops speltoides and the G genome of T. timophevii are closely related, suggesting the same origin of some parts of their genomes. None of the Aegilops genomes analyzed is a close relative of the B genome, so the diploid progenitor of the B genome remains unknown. SN - 0027-8424 UR - https://www.unboundmedicine.com/medline/citation/12060759/Genes_encoding_plastid_acetyl_CoA_carboxylase_and_3_phosphoglycerate_kinase_of_the_Triticum/Aegilops_complex_and_the_evolutionary_history_of_polyploid_wheat_ L2 - http://www.pnas.org/cgi/pmidlookup?view=long&pmid=12060759 DB - PRIME DP - Unbound Medicine ER -