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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 74, No. 2, 2014, pp. 135-142
Bioline Code: cj14021
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 74, No. 2, 2014, pp. 135-142

 en Trait analysis, diversity, and genotype × environment interaction in some wheat landraces evaluated under drought and heat stress conditions
Sareen, Sindhu; Tyagi, Bhudev Singh; Sarial, Ashok Kumar; Tiwari, Vinod & Sharma, Indu

Abstract

Both drought and heat stress are responsible for decline in wheat ( Triticium aestivum check for this species in other resources L.) production in many regions of the world. IPCC has predicted increase in these areas. Development of heat and drought tolerant genotypes is on priority. Landraces are unexploited genetic resources for various agronomic traits contributing tolerance to abiotic stress. Twenty-five wheat genotypes were evaluated in irrigated timely, rainfed timely and irrigated late sown conditions for 2 yr using 10 agronomic traits for their response to drought and heat stress and four stress indices (stress susceptibility index, stress tolerance index, mean productivity, and stress tolerance) were calculated. Variability averaged over traits was highest under rainfed conditions. Grain yield, plant height, and productive tillers were more sensitive and test grain weight as tolerant under drought. Under heat stress grain yield, grain weight, test grain weight and phenological traits were more sensitive. Productive tillers and grain number per spike were identified as important selection parameters for drought and grain weight (per spike and test grain weight) as for heat tolerance. Genotypes IC 321987, IC 322005, IC 138852, IC 138870 adapted to stressed environments or genotypes CPAN 4079 and NEPAL 38 stable over all environments can be used for introgression of the stress tolerance in elite cultivars.

Keywords
Drought stress; genotype by environment interaction; heat stress; land races; wheat

 
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