Screening Some Advanced Upland Cotton (Gossypium Hirsutum L.) Genotypes Tolerance Under Water Deficit

Authors : Sadettin Celik

Pages : 104-110

Doi:10.46810/tdfd.1386233

View : 236 | Download : 55

Publication Date : 2024-03-26

Article Type : Research Paper

Abstract :Upland cotton is the most widely cultivated among cotton species and is the best natural fiber source for the textile industry. However, abiotic stress, particularly drought stress, adversily affects important cotton planting regions. This study uses phenotypic drought markers to ascertain the tolerances of some advanced cotton lines under the limited irrigation conditions obtained from the drought-tolerant variety development breeding program. The study was conducted according to the randomized plot design with three replications. A total of 16 genotypes were used, with fourteen lines selected from the F2 segregation stage of the drought-tolerant variety breeding program, and two varieties used as control varieties. Variance analysis (ANOVA) was conducted, the differences between the means were found to be significant (P<0.01). The highest root length (RL) was recorded in Aras 24 genotype, while the lowest was in Aras28. Aras 40 showed the highest root weight (RW) value, followed by Aras 24 and TEX (control). The lowest RW values were seen in Aras 28 and Aras 29. Regarding lateral fresh weight (LFW), Aras 28 recorded the lowest, while Aras 24 recorded the highest value. Lastly, Aras 41 showed the highest relative water content (RWC) value of 92, followed by Aras 38 and TEX. In conclusion, if the breeding program is continued with Aras 41, Aras 40, and Aras 24 varieties, it will significantly contribute to the goal.
Keywords : Drought tolerance, Cotton, Cluster, Morphological traits

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