article · Journal of Experimental Biology and Agricultural Sciences
A comparative evaluation examined drought tolerance and yield stability across various barley genotypes over two consecutive growing seasons under optimal and water-stressed conditions. Water deficits substantially influenced growth parameters, overall yield, and yield-related traits across both seasons. The findings demonstrated notable genetic variation among the tested lines, showing that selection under stress conditions is critical for identifying resilient varieties. Among the tested material, Line 2 displayed the shortest heading and maturity times, positioning it as a useful parent for early maturity traits in breeding programmes. In addition, Line 7 and Line 11 achieved the highest yield potential under water-deficit conditions across both seasons. These two genotypes recorded favourable stress tolerance indices, indicating strong yield performance and suitability for cultivation in both drought-prone and well-watered agricultural settings.
Drought severely restricts cereal crop production, threatening food security in water-scarce regions. Identifying barley varieties that maintain yields under drought helps farmers maintain harvest stability despite unpredictable rainfall. Pinpointing specific lines with early maturity or high water-stress tolerance provides plant breeders with proven genetic material to develop hardier crops capable of thriving under changing climate conditions.
This research represents applied, early-stage crop breeding. The identified barley genotypes, specifically Line 2 for early maturity and Lines 7 and 11 for drought tolerance, can be utilised directly by public or commercial plant breeding programmes. Further multi-location trials and formal variety registration would be required before these genotypes or their progeny can be commercialised as certified seed for farmers facing water-stressed growing conditions.
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This comparative study was conducted to access the drought tolerance and yield stability in different genotypes of barley. Study was conducted in growing seasons of 2013-14 and 2014-15 by imposing two water regimes viz. optimal and water stressed. Result of study revealed sufficient genetic variability among the genotypes, substantial expression of genetic potential and the importance of selection was based on stress condition. The mean squares of irrigation regimes explained most of the variations for all the traits in both growing seasons, indicating the relative importance of the genotypes in drought tolerance. Water deficient conditions highly affect the various growth parameters, yield and yield traits in both the studied growing seasons. Among the studied genotypes, Line 2 genotype have minimum heading and maturity time so this genotype could be use as a source of earliness in breeding program. Further, Line 7 and Line 11 genotypes showed highest yield potential under water deficit condition in both seasons, possessed high values for MP, YSI, STI, GMP, YI, and least SSI values less than one indicating suitability of these genotypes for drought tolerance and desirability for both water deficit and non-deficit conditions.
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DOI: 10.18006/2017.5(2).151.162
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