INVESTIGATION OF TOTAL SEED STORAGE PROTEINS OF PAKISTANI AND JAPANESE MAIZE (ZEA MAYS L.) THROUGH SDS-PAGE MARKERS

Abstract

The assessment of genetic diversity among the members of a species is of vital importance for successful breeding and adaptability. In the present study 83 genotypes of maize of Pakistani and Japanese origin were evaluated for the total seed storage proteins using sodium dodecyl sulphate polyacrylamide gel lectrophoresis (SDS-PAGE) through vertical slab unit. The total protein subunits were separated on 12% olyacrylamide gel using standard protocols. A total of 18 protein subunits were noted out of which 7 (39%) ere monomorphic and 11 (61%) were polymorphic, with molecular weight ranging from 10 to 122 kDa. Coefficients f similarity among the accessions ranged between 0.89 and 1.00. The dendrogram obtained through UPGMA lustering method showed two main clusters: 1 and 2. First cluster comprised of 9 genotypes including ahiwal-2002, while second cluster contained 74 genotypes including Aaiti-2002 and Sadaf. Over all a low level of olymorphism was observed in total seed storage protein patterns of maize genotypes from Pakistan as well as Japan. It is inferred from the present study that more genotypes of maize could be brought under study and more advanced biochemical techniques with more reliable results could be followed to bring assessment of genetic diversity of maize for planning breeding programs