Identification and Mapping of Genes Controlling K+/Na+ Selectivity in Lophopyrum elongatum

9728576德沃夏克盐度在许多自然情况下是一种环境条件。盐碱化也是灌溉农业的一大危害。因此，了解植物适应盐碱环境的机制，无论是从基础知识还是从实际意义上来说，都是非常重要的。在该项目的前一阶段，由小麦的高耐盐性亲缘种长麦草与小麦杂交产生的双二倍体(一种稳定的杂种)被证明是耐盐性的。建立了7条长穗麦草染色体分别携带的小麦品系，并用它们鉴定了控制耐盐性的长麦冬染色体。每条长穗莲染色体都能提高小麦的耐盐性。染色体1E、3E、6E和7E通过控制钾/钠离子的选择性来增强耐盐性。在该项目的这一阶段，这些用于染色体的基因将与特定的小麦染色体重组。通过提高这四条染色体上的钾/钠离子选择性来控制耐盐性的基因将被识别和定位。

9728576 Dvorak Salinity is an environmental condition in many natural situations. Salinization is also a major hazard to irrigated agriculture. Therefore, the understanding of the mechanisms by which plants adapt to saline environmental conditions is important both for the sake of the basic knowledge and for practical reasons. In the previous phase of this project, an amphiploid (a stable hybrid) from a cross between Lophopyrum elongatum, a highly salt-tolerant relative of wheat, and wheat was shown to be salt-tolerant. Wheat lines carrying individually each of the seven L. elongatum chromosomes were developed and used to identify Lophopyrum elongatum chromosomes controlling salt tolerance. Each L. elongatum chromosome was found to enhance salinity tolerance of wheat. Chromosomes 1E, 3E, 6E, and 7E were found to be enhance salinity tolerance by controlling potassium/sodium ion selectivity. In this phase of the project these for chromosomes will be recombined with specific wheat chromosomes. Genes controlling salt tolerance via enhancing potassium/sodium ion selectivity on these four chromosomes will be identified and mapped.