Recently,thousands of SSR and now SNP markers have been discovered in cotton.Each of these markers provides a valuable molecular tool applying genetic and genomic research to cotton improvement.Cotton DNA marker database(CMD) continues to serve as a molecular marker resource for the Recently, thousands of SSR and now SNP markers have been discovered in cotton. Each of these markers provides a valuable molecular tool applying genetic and genomic research to cotton improvement. Cotton DNA marker database (CMD) continues to serve as a molecular marker resource for the