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Evaluation and development of F1 hybrids tolerant to Verticillium dahliae Klebhan | ||
| Caspian Journal of Environmental Sciences | ||
| مقالات آماده انتشار، اصلاح شده برای چاپ، انتشار آنلاین از تاریخ 02 مهر 1404 اصل مقاله (667.07 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22124/cjes.2025.9075 | ||
| نویسندگان | ||
| Viktor Avtonomov* ؛ Azam Ravshanov؛ Dilbar Rashidova؛ Normuxammad Mamedov؛ Muzaffar Yakubov؛ Shuhrat Sharipov؛ Jamoliddin Jabborov؛ Sharofiddin Karimov؛ Xurshid Jalolov | ||
| Laboratory at Cotton Breeding, Seed Production and Agrotechnologies Research Institute, Tashkent, Uzbekistan | ||
| چکیده | ||
| The present study focuses on evaluating cotton, Gossypium hirsutum L. varieties and their hybrids for resistance to Verticillium dahliae Kleb., one of the major pathogens causing wilt disease. Five varieties of different genetic origins—SB-6, C-6541, Namangan-34, C-6545, and Namangan-77—were used as initial material for hybridization and further analyzed along with their F1 and F2 generations. Resistance was assessed by two complementary approaches: an enzyme-linked immunosorbent assay (ELISA) test system and a six-point field assessment method. Both methods provided consistent and comparable results, confirming their reliability for evaluating resistance to V. dahliae. The most resistant parental varieties were Namangan-34, Namangan-77, and C-6541. Among F1 hybrids, high levels of resistance were observed in the combinations Namangan-77 × C-6541, Namangan-34 × SB-6, C-6541 × SB-6, C-6541 × C-6545, C-6545 × C-6541, and SB-6 × C-6541. Analysis of the dominance index (hp) indicated adverse effects of both complete and incomplete dominance for susceptibility traits in several hybrid combinations, suggesting their potential use in breeding programs for developing resistant varieties. In the F2 generation, combinations such as Namangan-34 × C-6545, Namangan-34 × SB-6, C-6541 × Namangan-77, and SB-6 × Namangan-77 exhibited lower mean susceptibility to V. dahliae. Variation series analysis also revealed individual plants with significantly greater resistance than either parent. Heritability coefficient (h²) analysis demonstrated genotypic variability ranging from weak to strong expression across hybrids. These findings highlight promising hybrid combinations and confirm the effectiveness of combined biochemical and field assessments for breeding cotton resistant to V. dahliae. | ||
| کلیدواژهها | ||
| Cotton؛ Medium-fiber؛ Variety؛ Hybrid؛ Resistance؛ Verticillium dahliae Kleb | ||
| مراجع | ||
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