Differential Expression of Salinity Resistance Genes on Upland Cotton

Differential Expression of Salinity Resistance gene on upland Cotton Wuwei Ye,Shuxun Yu Cotton Research Institute, CAAS National Center for Cotton Genetic Improvement Anyang, Henan 455000, China ĦĦĦĦSalinity resistance and differential gene expression associated with salinity in cotton germplasm were studied, according to the large scale of saline area in China and its negative significant effects on the cotton production. The salinity-resisted genes and their differential expression were studied under the stress of NaCl on cotton. There found, under the NaCl stress, 1644 genes differentially expressed from the salinity-sensitive cotton and only 817genes differentially expressed from the salinity-resisted cotton. The differential expressed genes could be divided into five groups according to the expressed levels by the cluster analysis. A group: 32 up-conditioned genes, differentially expressed only in the salinity-resisted cotton; B group, 548 up-conditioned genes, differentially expressed only in the salinity-sensitive cotton; C group, 176 down-conditioned genes, differentially expressed only in the salinity-resisted cotton; D group, 487 up-conditioned genes, differentially expressed only in the salinity-sensitive cotton; E group, 609 down-conditioned genes, differentially expressed both in the salinity-sensitive and salinity-sensitive cotton. The salinity-resisted differentially genes could also be divided into 4 groups according to the known functions of the expressed protein: 96 osmotin genes, 48 toxicity-reduced genes, 136 transcription factors, and 98 signal transmitted genes. Key word: cotton, salinity resistance, differential expressed gene