Quantitative Effects of Heat Stress on Fiber Related and Agronomically Important Parameters in Cotton (Gossypium Hirsutum L.)

Abstract

Climate change is one of the biggest problems for growing crops in a sustainable way around the world. At the cotton research station in Bahawalpur, th is experiment aimed to assess and classify cotton genotypes under conditions of heat stress. The study was done using RCBD with three replications. The distance between plants was 30 cm, and the distance between rows was kept at 75 cm. For key plant and fiber quality traits, data were taken from ten fully guarded plants and chosen randomly. Under conditions of heat stress, ANOVA showed that there were highly significant differences among the plant traits that were studied. The correlation coefficient analysis showed that seed cotton yield has a positive correlation with plant height (r = 0.46), plant population per hectare (r = 0.33), sympodial branches per plant (r = 0.27), number of bolls per plant (r = 0.27) and nodes per plant (r = 0.27) but a negative relationship with staple length (r = -0.35). The multivariate statistical methods of principal component and cluster analysis were used to describe cotton genotypes. Principal component analysis and cluster analysis showed that the most productive and heat-tolerant cotton genotypes were BH-200, BH-254, CIM-600, and BH-341. Also, BH-284 seemed more resistant to CLCuV than the other genotypes. So, rigorous, large-scale, and multilocation testing must be done on these cotton genotypes and plant traits to make cotton genotypes that can handle heat and CLCuV

Genetic Characterization and Performance Evaluation of Elite Cotton Strains for Morphological and Physio-Chemical Traits Under Heat Stress Conditions

“…Moreover, variations among cotton strains for these parameters were non-significant in replications except for plant height, which showed highly significant diversity among cotton strains with respect to plant height. Similar findings were also reported by Aslam et al, 2022;Hussain et al, 2023a;Hussain et al, 2023b andYousaf et al, 2023 who revealed significant variations among cotton genotypes for similar/same traits under heat stress conditions. The correlation coefficient analysis was executed to understand the magnitude and direction of association between studied plant traits in upland cotton strains under heat stress conditions (Table 4).…”

Evaluation of Upland Cotton Genotypes for Morphometric, Photosynthesis-Related Traits and Parameters Related to Enzymatic and Non-Enzymatic Antioxidant Accumulation

“…However, variations in total chlorophyll contents and Monopodial Branches for cotton genotypes were significant, but the variations for Sugars contents were insignificant at 1% and 5%, respectively. Similar results were also found by Zafar et al (2022), Shafique et al (2023), Hussain et al (2023), and Yousaf et al (2023), who showed the presence of significant variations in cotton genotypes for morphophysiological and biochemical traits and emphasized on the utilization of diverse cotton germplasm to make proper selection.…”

Genetic Characterization of Cotton Genotypes Based on Morpho-Physiological, Biochemical and Disease-Associated Traits Through Multivariate Approaches

“…However, the changes for plant population and virus attack were non-significant at 1% and 5%, respectively. Similar findings were made by Bhatti et al (2020a), Bhatti et al (2020b), Aslam et al (2022), Hussain et al (2023), andYousaf et al (2023), who emphasized the importance of using a diversity of cotton germplasm to make the best selections and demonstrated the presence of significant variations in cotton genotypes for morphophysiological and biochemical traits.…”