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The origin of spelt and free-threshing hexaploid wheat.
J Hered. 2012 May-Jun; 103(3):426-41.JH

Abstract

It is widely believed that hexaploid wheat originated via hybridization of hulled tetraploid emmer with Aegilops tauschii (genomes DD) and that the nascent hexaploid was spelt, from which free-threshing wheat evolved by mutations. To reassess the role of spelt in the evolution of Triticum aestivum, 4 disomic substitution lines of Ae. tauschii chromosome 2D in Chinese Spring wheat were developed and one of them was used to map the Tg locus, which controls glume tenacity in Ae. tauschii, relative to simple sequence repeat (SSR) and expressed sequence tag loci on wheat chromosome 2D. The segregation of SSR markers was used to assess the presence of Tg alleles in 11 accessions of spelt, both from Europe and from Asia. Ten of them had an inactive tg allele in the D genome and most had an active Tg allele in the B genome. This is consistent with spelt being derived from free-threshing hexaploid wheat by hybridization of free-threshing wheat with hulled emmer. It is proposed that the tetraploid parent of hexaploid wheat was not hulled emmer but a free-threshing form of tetraploid wheat.

Authors+Show Affiliations

Department of Plant Sciences, University of California, Davis, CA 95616, USA. jdvorak@ucdavis.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

22378960

Citation

Dvorak, Jan, et al. "The Origin of Spelt and Free-threshing Hexaploid Wheat." The Journal of Heredity, vol. 103, no. 3, 2012, pp. 426-41.
Dvorak J, Deal KR, Luo MC, et al. The origin of spelt and free-threshing hexaploid wheat. J Hered. 2012;103(3):426-41.
Dvorak, J., Deal, K. R., Luo, M. C., You, F. M., von Borstel, K., & Dehghani, H. (2012). The origin of spelt and free-threshing hexaploid wheat. The Journal of Heredity, 103(3), 426-41. https://doi.org/10.1093/jhered/esr152
Dvorak J, et al. The Origin of Spelt and Free-threshing Hexaploid Wheat. J Hered. 2012 May-Jun;103(3):426-41. PubMed PMID: 22378960.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The origin of spelt and free-threshing hexaploid wheat. AU - Dvorak,Jan, AU - Deal,Karin R, AU - Luo,Ming-Cheng, AU - You,Frank M, AU - von Borstel,Keith, AU - Dehghani,Hamid, Y1 - 2012/02/29/ PY - 2012/3/2/entrez PY - 2012/3/2/pubmed PY - 2012/8/7/medline SP - 426 EP - 41 JF - The Journal of heredity JO - J Hered VL - 103 IS - 3 N2 - It is widely believed that hexaploid wheat originated via hybridization of hulled tetraploid emmer with Aegilops tauschii (genomes DD) and that the nascent hexaploid was spelt, from which free-threshing wheat evolved by mutations. To reassess the role of spelt in the evolution of Triticum aestivum, 4 disomic substitution lines of Ae. tauschii chromosome 2D in Chinese Spring wheat were developed and one of them was used to map the Tg locus, which controls glume tenacity in Ae. tauschii, relative to simple sequence repeat (SSR) and expressed sequence tag loci on wheat chromosome 2D. The segregation of SSR markers was used to assess the presence of Tg alleles in 11 accessions of spelt, both from Europe and from Asia. Ten of them had an inactive tg allele in the D genome and most had an active Tg allele in the B genome. This is consistent with spelt being derived from free-threshing hexaploid wheat by hybridization of free-threshing wheat with hulled emmer. It is proposed that the tetraploid parent of hexaploid wheat was not hulled emmer but a free-threshing form of tetraploid wheat. SN - 1465-7333 UR - https://www.unboundmedicine.com/medline/citation/22378960/The_origin_of_spelt_and_free_threshing_hexaploid_wheat_ L2 - https://academic.oup.com/jhered/article-lookup/doi/10.1093/jhered/esr152 DB - PRIME DP - Unbound Medicine ER -