title: Thinopyrum ponticum chromatin-integrated wheat genome shows salt-tolerance at germination stage.
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. ponticum-T. aestivum translocated chromosomes bearing the salt-tolerance. This is an initial step of molecular breeding for salt-tolerant wheat.
authors: Molecular Genetics Laboratory, Faculty of Agriculture, Tottori University, 101, Minami 4-chome, Koyama-cho, Tottori 680-8553, Japan.
authors: Wen-Ye
authors: WY
authors: Yuan
authors: Research Institute of Green Science and Technology, Shizuoka University, 836, Ohya, Suruga-ku, Shizuoka 422-8529, Japan. omtomit@ipc.shizuoka.ac.jp.|Molecular Genetics Laboratory, Faculty of Agriculture, Tottori University, 101, Minami 4-chome, Koyama-cho, Tottori 680-8553, Japan. omtomit@ipc.shizuoka.ac.jp.
authors: Motonori
authors: M
authors: Tomita
mesh_terms: D002843:Chromatin / Q000235:genetics*; D018745:Genome, Plant / Q000235:genetics; D018525:Germination / Q000187:drug effects / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence; D055049:Salt Tolerance / Q000235:genetics; D012965:Sodium Chloride / Q000494:pharmacology; D014908:Triticum / Q000187:drug effects* / Q000235:genetics*
chemical_list: D002843:Chromatin; D012965:Sodium Chloride