Role of Molecular Markers and Importance of SNP for the Development of Cotton Programs

Cotton is an important commercial cash crop and cultivated worldwide. It is very important for improvement of desirable traits for development of cotton crop. In this review paper we have discussed the overall Molecular markers and advance techniques with their utilization in cotton improvement programmers. Molecular markers have reliable results and performance increased research of cotton breeding programs. Molecular markers are used to analyze genomic variations, association mapping, fingerprinting and genetic diversity in cotton crop.SNP markers have many advantages for genotyping of large populations as compared to previous marker systems. It is more advance and efficient processing technique. With the help of SNP technique we get more accurate results as compared to other markers in a short time. Overall DNA markers are used in cotton include Restriction Fragment Length Polymorphism (RFLP), Random Amplified Polymorphic DNA (RAPD), Amplified Fragment Length Polymorphism (AFLP), Simple Sequence Repeats (SSR) and Single Nucleotide Polymorphism, with their history current development, implication and importance in cotton breeding. Keywords PCR Polymerase chain reaction QTLs Quantitative trait loci RAPD Random amplified polymorphic DNA RFLP Restriction fragment length polymorphism RIL Recombinant inbred line SNPs Single nucleotide polymorphisms SSR Simple sequence repea