Evaluation of Drought Tolerance in 16 Genotypes of Safflower(Carthamus tinctoriusL )

پژوهشهای زراعی ایران

Article 15, Volume 8, Issue 5 - Serial Number 19, November and December 2010, Pages 862-870   

Document Type: Research Article

DOI: 10.22067/gsc.v8i5.8030

Author

S. M Azimzadeh^*

Abstract

Abstract
In order to study drought tolerance of 16 genotypes of safflower an experiment was conducted in Research Farm of Shirvan Islamic Azad University during 2005 –2006 growing season. The experiment was performed as randomized complete block design with 4 replications in two separate irrigated and rainfed conditions. The seed rate was 20 seed per square meter, hand planted in each plot. During growing season some agronomic traits including number of grains per heads, grain yield of total head per plant, TKW and grain yield per hectare were recorded. To select drought tolerant genotypes 4 methods including stress tolerance index, stress susceptibility index, cell membrane stability and relative water content were applied. The results showed that two genotypes of LRV-51-51 and CW74 had the highest drought tolerance index and the lowest drought susceptibility index compared with the other genotypes. Grain yield of these two genotypes was 1520 and 1452 kg/ha, respectively which were more than other genotypes. According to these traits the genotypes LRV-51-51 and CW74 are recommended to plant in dry regions with low annual rainfall.

Keywords: Safflower, Drought tolerance index, Drought susceptibility index, Yield