Cotton Genetic Resilience: Cytogenetic Tools for Biotic and Abiotic Stress Mitigation

Abstract

Cotton (Gossypium spp.) holds immense significance in the global economy due to its prized fiber, produced from the epidermal cells of the ovule. Among the approximately fifty cotton species, Gossypium arboreum, Gossypium herbaceum, Gossypium hirsutum, and Gossypium barbadense are primarily cultivated for fiber production. Of these, Gossypium hirsutum (Upland cotton) dominates global production, contributing to over 90% of the cotton used worldwide. Advancements in cotton cytogenetics have greatly enhanced fiber yield and quality, driven by the adoption of modern genomic and genetic engineering techniques. Innovations like CRISPR-Cas9, RNA interference (RNAi), and marker-assisted selection have improved cotton's tolerance to biotic and abiotic stresses, including pests and drought. These technologies have also enabled the refinement of fiber properties through epigenetic modifications. The development of male sterility systems has further streamlined breeding programs, accelerating genetic improvements in cotton. This analysis highlights the pivotal role of advanced cytogenetic and biotechnological tools in fostering the sustainable growth of cotton. The integration of these cutting-edge techniques marks a transformative era in cotton breeding, with promising prospects for improving fiber quality, enhancing stress resistance, and boosting overall crop performance. These advancements solidify cotton’s vital role in global agriculture and its potential for future innovation.