A Study Towards the Development of Salt Tolerant Upland Cotton (Gossypium Hirsutum L.)

ABSTRACT

Salt-affected areas are increasing at a rapid rate that are decreasing agricultural productivity. For this purpose, 6 salt-tolerant and 3 salt-sensitive parents were crossed in a Line × Tester fashion and were sown under control, 10 and 15 dSm⁻¹ salt stress for 2 years. Data were recorded for various biochemical, agronomic, and fiber quality traits like H₂O₂ (hydrogen peroxide), SOD (superoxide dismutase), POD (peroxidase), CAT (catalase), TSP (total soluble proteins), K+ (potassium), Na⁺ (sodium), potassium to sodium ratio (K+/Na+), plant height, number of bolls, boll weight, seed cotton yield, GOT% (ginning out turn) fiber fineness, fiber length, and fiber strength. Mean values of plant height, number of bolls, boll weight, seed cotton yield, K⁺, K⁺/Na⁺, fiber fineness, fiber length, fiber strength, antioxidants’ activities showed significant reductions under salt stress. Contrarily, Na⁺, GOT%, H₂O₂, TSP and POD activity increased under salt stress, and this effect was more profound under 15 dSm⁻¹. KEHKSHAN × FH-114 remained outstanding in both years and was found salt-tolerant genotype which can be effectively used in future breeding program.

摘要

受盐影响的地区正在迅速增加,农业生产力正在下降. 供试品系在盐敏感期为10×15年,对照品系为耐盐型和耐盐型. 记录了过氧化氢(H2O2)、超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)、总可溶性蛋白(TSP)、K+(钾)、钠(Na+)、钾钠比(K+/Na+)、株高、铃数、铃重、籽棉产量等各项生化指标、农艺性状和纤维品质性状的变化纤维细度、纤维长度和纤维强度. 盐胁迫下,株高、铃数、铃重、籽棉产量、K+、K+/Na+、纤维细度、纤维长度、纤维强度、抗氧化活性的平均值均显著降低。相反,盐胁迫下Na+、GOT%、H2O2、TSP和POD活性增加,15dsm-1处理对其影响更大. KEHKSHAN ×FH-114在两年内表现突出,并已发现耐盐基因型,可有效应用于今后的育种工作.

KEYWORDS:

• Gossypium hirsutum L.
• salt tolerance
• ionic homeostasis
• fiber traits
• antioxidants

关键词:

• 耐盐性
• 离子稳态
• 纤维特性
• 抗氧化剂

Acknowledgments

Authors are thankful to the Chickpea Biotechnology Lab USPCAS-AFS, Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad for providing the space for experimentation. Dr. Muhammad Awais Farooq is also thankful to Higher education commission to provide the funding through Ph.D. scholarship Pin # 315-1684-2AV3-007 for research. Dr. Muhammad Awais Farooq is also thankful to Dr. Patrick Edgar MSU, USA who took his time to improve the manuscript.

Authors’ contributions

Muhammad Awais Farooq conceptualize and wrote the 1^st original draft. Muhammad Mubashar Zafar and Waqas Shafqat Chatha assisted in designing and statistics of the experiment. Muhammad Farooq edit the manuscript and Tayyab Husnain proof read the manuscript. Final approval for publication was given by the group leader of cotton research Amir Shakeel.

Declaration of interest statement

Authors declare that they have no conflict of interest for the publication of the manuscript.

Supplementary materials

Supplemental data for this article can be accessed on the publisher’s website.

Additional information

Funding

This work was supported by the Higher Education Commision, Pakistan [PIN NO. 315-1684-2AV3-007].