Evaluation of Irrigation Water Salinity Tolerance Indices in New Cultivars and Lines of Safflower

Document Type : Research Paper

Authors

1 Assistant Professor of Soil and Water Research Department, , Fars Agricultural and Natural Resources Research and Education Center, AREEO, Darab, , Iran

2 Faculty Educator of Seed and Plant Improvement Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Darab, Fars, Iran

Abstract

    In order to evaluate the salinity tolerance indices and to select the ideal genotype among several new cultivars and lines of safflower, a factorial experiment was conducted in a completely randomized design with three replicates in Darab Agricultural and Natural Resources Research Station. The first factor, with two salinity levels of irrigation water consisted of 0.98 (as control) and 7.8 dS.m-1, and the second factor with eight safflower genotypes included Goldasht, Parnian, Golmehr, Isfahan, Padideh and three promising lines Mec14., Mec235 and Mec248. For evaluation of salinity tolerance of cultivars and lines, some indices including stress sensitivity (SSI), harmonic mean (HM), tolerance index (TOL), stress tolerance index (STI), geometric mean productivity (GMP), index average productivity (MP), yield index (YI), yield stability index (YSI) and finally the ideal genotype selection index (SIIG) technique were used. Based on the results, MP, GMP, HM, YI and STI indices had the highest correlation with grain yield under control and salinity conditions, thus they were recognized as the most suitable indices for determining salinity tolerance. According to these indices, Mec248 line was introduced as the best genotypes in this experiment. On the other hand, based on ideal genotype selection index (SIIG), Parnian genotype with the highest value (0.683) was introduced as the most tolerant genotype to salinity stress. Therefore, this genotype is recommended for planting in similar southern areas that have salinity problems.

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Main Subjects

References

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Iranian Journal of Soil and Water Research
Volume 51, Issue 7
September 2020
Pages 1811-1821

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