Background

Cotton is the world’s richest source of natural fiber. Meanwhile cotton plant is top ranked stress sensitive plant thereby affecting its yield and fiber quality. But, in climate change scenario, fiber yield and quality are being affected due to environmental stresses, especially heat, drought and salinity. Present study is aimed to identify cotton genotype harboring prominently expressed stress responsive genes.

Methods

Four cotton genotypes (IUB-13, IUB-222, IUB-09 and MM-58) were evaluated under drought and salinity stress for yield traits and expression of different stress responsive genes (GhWRKY3, GhDREB2 and GhRDR6).

Results

Pronounced expression of GhWRKY3, GhDREB2and GhRDR6 was observed in cotton variety IUB-13 in stress condition (drought and salinity) as compared to control followed by IUB-222 which revealed that these genotypes might possess substantial potential to cope with environmental hazards encountered in growing season

Conclusion

Utilization of cotton genotypes i.e., IUB-13 and IUB-222 in cotton breeding program can be very much fruitful for developing cotton genotypes adoptable to climate change.

中文翻译：

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棉花Gossypium hirsutum L中应激反应基因的表达研究。

背景

棉花是世界上最丰富的天然纤维来源。同时，棉花植物是顶级的胁迫敏感植物，从而影响其产量和纤维质量。但是，在气候变化情景中，纤维产量和质量受到环境压力的影响，尤其是高温、干旱和盐分。本研究旨在鉴定具有显着表达的应激反应基因的棉花基因型。

方法

在干旱和盐分胁迫下评估了四种棉花基因型（IUB-13、IUB-222、IUB-09 和 MM-58）的产量性状和不同胁迫响应基因（GhWRKY3、GhDREB2和GhRDR6）的表达。

结果

GhWRKY3、GhDREB2和GhRDR6的显着表达在棉花品种 IUB-13 中观察到，在胁迫条件下（干旱和盐度），与随后的 IUB-222 对照相比，这表明这些基因型可能具有应对生长过程中遇到的环境危害的巨大潜力季节

结论

在棉花育种计划中利用棉花基因型IUB-13和IUB-222对于开发适应气候变化的棉花基因型非常有成效。