PJB-2021-357
Genetic screening of wheat using multivariate analysis under moisture stress
Haji Muhammad Umer Memon, Hadi Bux, Mahboob Ali Sial, Nazik Hussain, Sarfraz Ali Soomro, S.M. Mujtaba and Farooque Ali Bughio
Abstract
Drought is a major environmental constraint to wheat (Triticum aestivum L.) productivity worldwide. Screening the drought tolerance of novel wheat genotypes is an important mitigation strategy. To achieve this, an experiment was carried out to investigate 26 wheat genotypes in randomized complete block design (RCBD) with three replications and two treatments water stress (T1) and well-watered (T2). Analysis of variance depicted highly significant differences among genotypes and treatments for all the observed morphological, physiological and biochemical traits viz., flag leaf area, plant height, spike length, grains weight per plant, straw weight per plant, thousand kernels weight, tillers per plant, glycine-betaine, potassium content, nitrate reductase activity, osmotic potential, proline content, relative water content, total chlorophyll content and total soluble sugars. Under drought conditions, thousand kernels weight positively correlated with flag leaf area, spike length, tillers per plant, grains weight per plant, glycine-betaine, potassium content, nitrate reductase activity, proline content, relative water content and total chlorophyll content. Genetic distances grouped all the wheat genotypes into two different clusters. In water stress conditions, cluster I consisted susceptible wheat genotypes, while cluster number II contained all the tolerant wheat genotypes. Principal components 1, 2 and 3 revealed the respective variability of 54.25, 12.33 and 8.6 under water stress. In this study, stress tolerance index (STI) and drought susceptibility index (DSI) expressed wheat genotypes IBWSN-1025, IBWSN-1144, IBWSN-1150, DH-12/7, DH-12/31 and MASR-64 as drought tolerant. These wheat genotypes bestow drought tolerance and might contribute to circumvent food security issues. The findings of this study will be recommended to the local farmers regarding grain yield improvements.
To Cite this article:
Memon, H.M.U., H. Bux, M.A. Sial, N. Hussain, S.A. Soomro, S.M. Mujtaba and F.A. Bughio. 2024. Genetic screening of wheat using multivariate analysis under moisture stress. Pak. J. Bot., 56(4): DOI: http://dx.doi.org/10.30848/PJB2024-4(12)
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