National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The drought stress is a complex phenomenon affecting the physiology of cotton plant which in turn reduces crop growth, yield and yield components. The detrimental impact of drought on cotton crop can be minimized by developing drought tolerant cultivars. An experiment was conducted using seventeen Gossypium hirsutum genotypes grown in split plot design at Agricultural Research Station, University of Agricultural Sciences, Dharwad, Karnataka, India. The genotypes were evaluated for genotypic variability for growth phenomena, biophysical and biochemical parameters, yield and yield attributing characters under irrigated and water deficit conditions. In irrigated condition highest number of bolls per plant were recorded in the genotype DLSa17 (27.3bolls/ plant). The relative water content of leaves was significantly highest in the genotype DSC1651 (81.79%) under rainfed condition. The leaf area was significantly highest in Sahana (920.50cm2) in rainfed condition. The mean seed cotton yield per hectare was higher in irrigated (796 kg/ha) than in rainfed (755kg/ha) condition but the difference was non significant. The genotypes ARBC1651, DSC-1651 and PA810 were high yielding under both the conditions among all the genotypes and the mean yield was 1286, 1077 and 1211 kg/ha respectively and therefore are said to be drought tolerant genotypes. The leaf carbohydrate content was significantly highest in the genotype DSC1651 (131.6mg/g) under rainfed condition. The leaf proline content was significantly highest in DSC1651 (2.24 µmol/g) under rainfed condition. The leaf protein content was highest in CPD1652 (120mg/g) under rainfed condition. The protein content was varying across the sub plots. Mean protein content was found to be high in irrigated conditions (21%) compared to rainfed condition (17%). The high levels of mean protein content at both the conditions were observed to be 22% in PA810, ARBH1601 and CPD1652 followed by 21% in DSC1651 and ARBC1651.
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