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Enhancing salt tolerance and yield potential in cotton: insights from physiological responses, genetic variability, and heterosis

文献类型： 外文期刊

作者： Zafar, Muhammad Mubashar 1 ; Razzaq, Abdul 3 ; Anwar, Zunaira 4 ; Ijaz, Aqsa 4 ; Zahid, Muhammad 2 ; Iqbal, Muhammad Shahid 5 ; Farid, Ghulam 6 ; Seleiman, Mahmoud F. 7 ; Zaman, Rana Qammar Uz 8 ; Rauf, Abdur 9 ; Jiang, Xuefei 1 ;

作者机构： 1.Hainan Univ, Sanya Inst Breeding & Multiplicat, Sch Trop Agr & Forestry, Sanya, Peoples R China

2.Univ Agr Faisalabad, Dept Plant Breeding & Genet, Faisalabad, Pakistan

3.Univ Lahore, Inst Mol Biol & Biotechnol, Lahore, Pakistan

4.Pakistan Inst Engn & Appl Sci PIEAS, Nucl Inst Agr & Biol Coll NIAB C, Islamabad, Pakistan

5.Chinese Acad Agr Sci, Inst Cotton Res, Anyang, Peoples R China

6.Univ Agr Faisalabad, Dept Math & Stat, Faisalabad, Pakistan

7.King Saud Univ, Coll Food & Agr Sci, Dept Plant Prod, Riyadh, Saudi Arabia

8.PMAS Arid Agr Univ, Rawalpindi, Pakistan

9.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou, Hainan, Peoples R China

关键词： Cotton; salt stress; line x tester; general combining ability (GCA); specific combining ability (SCA); heterosis

期刊名称：TURKISH JOURNAL OF AGRICULTURE AND FORESTRY （ 影响因子：3.0； 五年影响因子：2.2 ）

ISSN： 1300-011X

年卷期： 2025 年 49 卷 1 期

页码：

收录情况： SCI

摘要： Soil salinity is a growing global concern, necessitating the development of salt-tolerant cotton cultivars to enhance the utilization of salt-affected soils and boost crop productivity. Salt tolerance is regulated by a complex interplay of genetic and physiological factors involving multiple genes. To investigate the genetic basis of salt stress tolerance, eight parental genotypes (four lines and four testers) and their 16 hybrid combinations were evaluated under normal and salt stress conditions (15 dS m-1). Data were collected on various traits including the plant height (PH), number of bolls per plant (NBP), boll weight (BW), lint percentage (LP), seed cotton yield (SCY), fiber length (FL), fiber strength (FS), fiber fineness (FF), chlorophyll a and b, carotenoids (CAR), total soluble proteins (TSP), hydrogen peroxide (H2O2), catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), potassium ions (K+), sodium ions (Na+), and K+ to Na+ ratio (K+/Na+). The box plot analysis indicated that the median values of the morphological and fiber traits were reduced under salt stress, with the exception of the FF and Na+, which increased. Antioxidant molecule levels were significantly elevated against salt stress, while the ionic and physiological traits decreased. The line x tester analysis revealed significant genetic variation among the genotypes for all the traits, with the testers contributing more to the variation than the lines and their interactions. Nonadditive gene action predominated for most of the morphological, physiochemical, and ionic traits, as indicated by the higher specific combining ability (SCA) effects compared to the general combining ability(GCA) effects under both conditions. Notably, the genotypes, Barani-333 and JSQ-White Hold, were identified as good general combiners. Cross combinations FBG-222 x Barani-222, Hatf-3 x CCB-17, and CCB-22 x JSQ-White Hold, exhibited desirable SCA effects and superior parent heterosis for most of the traits under both conditions. The identified parents and cross combinations showed potential for breeding programs aimed at developing salt-tolerant cultivars.

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