Paper Information

Journal:   SEED AND PLANT IMPROVEMENT JOURNAL   2011 , Volume 27-1 , Number 1; Page(s) 15 To 22.
 
Paper: 

EVALUATION OF DROUGHT TOLERANCE IN DURUM WHEAT GENOTYPES USING DROUGHT TOLERANCE INDICES

 
 
Author(s):  FALLAHI HOSSEIN ALI*, ALAT JAFARBYE J., SAYYEDI FARAMARZ
 
* AGRICULTURAL RESEACH STATION OF GONBAD, AGRICULTURAL AND NATURAL RESOURCES RESEARCH CENTE OF GOLESTAN, GORGAN, IRAN
 
Abstract: 

To evaluate drought tolerance in durum wheat, 49 lines along with one check cultivar Aria, were studied in an RCBD with two replications under drought stressed (rainfed) and non-stressed conditions at the Gonbad Agricultural Research Station, Golestan, Iran. Six drought tolerance indices, i.e. Stress Susceptibility Index (SSI), Tolerance Index (TOL), Mean Productivity (MP), Stress Tolerance Index (STI), Geometric Mean Productivity (GMP) and Harmonic Mean (HM) were calculated based on grain yield under stressed (Ys) and non-stressed (Yp) conditions. The analysis of variance of the data showed significant difference between genotypes. Lines SULA/AAZ-5//CHEN/ALTRA… and LIRO-3/LOTAIL-6 had the highest grain yield under stressed (447 gm-2) and non-stressed (529 gm-2) conditions, respectively. The highest MP, GMP, STI and HM were observed in line SULA/AAZ-5//CHEN/ALTRA…, but lines CNDO/PERIMADUR//HAI-OU17/3/SNITAN and R143/RUFF//STIL/3/YAV79/4/SHAWA/MALD/… had the greatest TOL and SSI, respectively. The correlation coefficients between tolerance indices and mean yield under stressed and non-stressed conditions revealed that the most effective indices for screening under these conditions were MP, STI, GMP and HM.

 
Keyword(s): DURUM WHEAT, DROUGHT, STRESS TOLERANCE INDICES, GRAIN YIELD
 
References: 
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