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

by Wen-Ye Yuan 2 and Motonori Tomita 1,2,*
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
Int. J. Mol. Sci. 2015, 16(3), 4512-4517; https://doi.org/10.3390/ijms16034512
Received: 9 October 2014 / Revised: 9 February 2015 / Accepted: 9 February 2015 / Published: 26 February 2015
(This article belongs to the Section Biochemistry)
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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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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