PJB-2020-158
MORPHO YIELD ATTRIBUTES OF BREAD WHEAT (TRITICUM AESTIVUM L.) GENOTYPES UNDER VARIOUS WATER REGIMES
ADIL ALI GADAHI
Abstract
Drought is serious problem in many parts of the world in circumstances of rapid change in climatic conditions especially for rainfed agriculture. In this regard, wheat being most important staple crop of Pakistan is highly affected by water stress. For combating this situation, a research was carried out on sixteen bread wheat genotypes to see the effect of water stress at the experimental field, NIA, Tandojam in a Randomized Complete Block Design with factorial arrangement of three treatments i.e. T1 (zero irrigation), T2 (two irrigations: 1st at 03 leaves stage, 2nd at tillering stage), T3 (four irrigations: 3rd at booting, 4th at grain filling) during Rabi season, 2016-2017. The mean squares from analysis of variance showed that genotypes and treatments were significant for all the traits whereas genotypes x treatment was significant for days to 75% maturity, spike length, spikelet spike-1, 1000-grain weight, grain yield plant-1, grains spike-1, biological yield plant-1, harvest index, while flag leaf area and plant height were non-significant. Among the treatments, T3 (four irrigation) recorded higher mean perform then T2 (two irrigation) and T1 (zero irrigation) which showed that different irrigation regimes caused significantly impact on all the traits. Among the genotypes, V3-10-34 showed minimum reduction in spike length, spikelets spike-1, grains spike-1, 1000-grain weight, grain yield plant-1 and harvest index. The genotype, V2-10-15 manifested minimum decrease for days to 75% maturity, spikelets spike-1 at zero irrigation and two irrigations. C7-98-4 gave minimum decrease for flag leaf area and V2-10-3 caused smaller amount of reduction for biological yield plant-1 at zero irrigation and two irrigations. The genotypes like V3-10-34, V2-10-15, C7-98-4 and V2-10-3 could be preferred for growing those areas where growers face the problem water shortage in the future stress breeding programmes.
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