INFLUENCE OF ARTIFICIALLY DEVELOPED SOIL SALINITY ON SOME PHYSIOLOGICAL AND AGRONOMIC TRAITS OF WHEAT

Abstract

To evaluate different wheat genotypes under artificially developed saline condition fifteen wheat genotypes were tested in two salinity levels (control and 12 dS m-1) at the research field of the department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University, Dinajpur during December 2016 to March 2017. Wheat genotypes showed earlier days to anthesis, greater stability of flag leaf chlorophyll and higher level of proline in flag leaf under saline condition compare to control. Plant height, tiller numbers at different days and yield attributes were reduced due to salinity compare to control. But the magnitude of reduction of these parameters due to salinity was not similar for all wheat genotypes. Salt tolerance index (STI) based on yield per plant indicated a wide range of difference in salt tolerance among the wheat genotypes. At saline condition, BAW 1194, BARI Gom 25, BAW 1203, BARI Gom 28, BAW 1208, BAW 1195 and BAW 1222 showed more than 0.8 STI, the wheat genotypes Shatabdi, BARI Gom 26, BARI Gom 29, BARI Gom 30, BAW 1182, BAW 1200, BAW 1202 and BAW 1209 provided less than 0.80 STI and the order of tolerance based on grain yield was BAW 1194> BARI Gom 25> BAW 1203> BARI Gom 28> BAW 1208> BAW 1195> BAW 1222> BARI Gom 26> BAW 1202> BAW 1209> BARI Gom 30 > BAW 1182> BARI Gom 29> Shatabdi> BAW 1200