Genetic Variation Studies of Ionic and within Boll Yield Components in Cotton (Gossypium Hirsutum L.) Under Salt Stress
2022
Zafar, Muhammad Mubashar | Razzaq, Abdul | Farooq, Muhammad Awais | Rehman, Abdul | Firdous, Hina | Shakeel, Amir | Mo, Huijuan | Ren, Maozhi | Ashraf, Muhammad | Youlu, Yuan
Cotton (Gossypium hirsutum L.) productivity is decreasing alarmingly by salinity. For genetic analysis of cotton response to salinity 8 parental genotypes and their 16 F₁ crosses were evaluated in Line × Tester fashion under normal and salt stress 15 dSm⁻¹. Data were recorded for plant height, number of bolls plant⁻¹, boll weight, lint weight, seed cotton yield plant⁻¹, lint percentage, seed index, lint index, number of seeds boll⁻¹, seed mass boll⁻¹, lint mass boll⁻¹, lint mass per seed, seed volume 100⁻¹ seeds, seed surface area, ionic ratio, fiber strength, fiber length, fiber fineness, GOT %, SOD, POD, CAT, TSP, and H₂O₂. The results showed that SCA estimates were higher than the GCA indicating the preponderance of non-additive gene action. Kahkashan, MS-71, and CRS-2007 were found good general combiner whereas FH-114 × FH-312 was found the best specific combiner. FH-114 × KAHKASHAN and FH-114 × FH-312 demonstrated significant heterosis for most traits under normal and salt stress conditions. The present study revealed that salt tolerance ability is controlled by a few dominant genes in the identified genotypes.
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