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Int. J. Mol. Sci. 2015, 16(3), 4512-4517; doi:10.3390/ijms16034512

Thinopyrum ponticum Chromatin-Integrated Wheat Genome Shows Salt-Tolerance at Germination Stage

1
Research Institute of Green Science and Technology, Shizuoka University, 836, Ohya, Suruga-ku, Shizuoka 422-8529, Japan
2
Molecular Genetics Laboratory, Faculty of Agriculture, Tottori University, 101, Minami 4-chome, Koyama-cho, Tottori 680-8553, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Jianhua Zhu
Received: 9 October 2014 / Revised: 9 February 2015 / Accepted: 9 February 2015 / Published: 26 February 2015
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

A wild wheatgrass, Thinopyrum ponticum (2n = 10x = 70), which exhibits substantially higher levels of salt tolerance than cultivated wheat, was employed to transfer its salt tolerance to common wheat by means of wide hybridization. A highly salt-tolerant wheat line S148 (2n = 42) was obtained from the BC3F2 progenies between Triticum aestivum (2n = 42) and Th. ponticum. In the cross of S148 × salt-sensitive wheat variety Chinese Spring, the BC4F2 seeds at germination stage segregated into a ratio of 3 salt tolerant to 1 salt sensitive, indicating that the salt tolerance was conferred by a dominant gene block. Genomic in situ hybridization analysis revealed that S148 had a single pair of Th. ponticumT. aestivum translocated chromosomes bearing the salt-tolerance. This is an initial step of molecular breeding for salt-tolerant wheat. View Full-Text
Keywords: wheat; Thinopyrum ponticum; salt tolerance; dominant gene block; translocation; genomic in situ hybridization (GISH) wheat; Thinopyrum ponticum; salt tolerance; dominant gene block; translocation; genomic in situ hybridization (GISH)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yuan, W.-Y.; Tomita, M. Thinopyrum ponticum Chromatin-Integrated Wheat Genome Shows Salt-Tolerance at Germination Stage. Int. J. Mol. Sci. 2015, 16, 4512-4517.

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