PJB-2021-397
Selection of potassium efficient and responsive wheat genotypes for sustainable low K-input agriculture
Muhammad Ali Khan, Muhammad Ubaidullah Shirazi, Aisha Shereen, Mahboob Ali Sial, Muhammad Athar Khan, Asma and Saifullah Baloch
Abstract
The study was conducted at early seedling stage for the evaluation of K-efficient and K-responsive wheat genotypes using Johnson’s solution adjusted to 0.3 mM (def.K) and 3.0 mM (adq.K) uses K2SO4 as Potassium source. The experiment was arranged in completely randomized design (CRD) and each treatment was replicated thrice. It was found that usually K-deficiency resulted to decrease biomass production, K- contents and K- use efficiency. On the contrary potassium use efficiency was enhanced, almost four folds in the genotypes grown at low K (0.3 mM) and significantly correlated with total biomass (r=0.732). On the basis of growth parameters, i.e. Shoot dry weight(SDW), Root dry weight(RDW), Total bio-mass(TBM), Root shoot ratio(RSR) and Potassium Use efficiency(KUE) ) as well as K-allocations parameters, i.e. Shoot Potassium accumulation(SKA), Root Potassium accumulation(RKA) and Total Potassium accumulation(TKA), nine genotypes, viz. MSH-14, NIA- Sundar, SD-4047, Khirman, 17-03, SD-222, NIA-MB-II, 54-03 and SD-621 were categorized as responsive & efficient (R&E), the highly desirable criterion. This study concluded that shoot dry weight and potassium use efficiency can be efficiently utilized for screening of wheat genotypes under deficient and adequate K conditions. It is further suggested that K-responsive and efficient wheat genotypes may be utilized in the breeding programme to develop K-efficiency for sustainable low K-input wheat production
To Cite this article:
Khan, M.A., M.U. Shirazi, A. Shereen, M.A. Sial, M.A. Khan, Asma and S. Baloch. 2023. Selection of potassium efficient and responsive wheat genotypes for sustainable low K-input agriculture. Pak. J. Bot., 55(2): DOI: http://dx.doi.org/10.30848/PJB2023-2(22)
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