The present invention provides a method for producing transgenic Cotton plants. In one method transformed plants, that overexpress the transgene shows a phenotype that includes increased boll number, size and lint percentage in compare to the wild type plants; whereas in the second method transformed plants that reduced the transgene level produced plants with decreased number of cotton boll, size and lint percentage in compare to wild type and overexpression line both. q-RT PCR analysis showed that transgene transcript level was higher at fiber initiation stage (0DPA) after that its level decreases throughout all developmental stages.