While CRISPR-Cas technology has shown promise in laboratory and greenhouse studies for improving salinity resistance in cotton by targeting specific genes involved in salt tolerance mechanisms, these innovations typically need to go through rigorous testing, field trials, regulatory approvals, and commercialization before becoming widely available to farmers.
Therefore, it's possible that there have been developments in this area. To get the most up-to-date information on the role of CRISPR-Cas in cotton for salinity resistance, I recommend consulting recent scientific publications and agricultural research reports or reaching out to experts in the field of cotton genetics and biotechnology.