Discipline: Animal Science
Plasma protein and isozyme polymorphism were analyzed from 210 blood samples of existing beef cattle among smallholder cattle raisers in the upland and lowland rain fed areas in the Central Visayas through starch gel electrophoresis. Nine presumptive loci were identified, namely: albumin with 1 genotype (AA); transferrin with 5 genotypes (AD, AE, DD, DE and EE); Esti, Est2 and Est3 with 9 genotypes (AA, AB and BB), respectively; Acph1 with 5 genotypes (AB, AC, BB.BC and CC) and Acph2 with 3 genotypes (AA, AB and BB) and MDH1 and MDH2 with 3 genotypes (AA.AB and BB), respectively. Proportions of polymorphic loci were higher in cattle from Cebu, Negros Oriental, and Bohol compared to Siquijor in both upland and lowland rainfed areas. The highest estimates of heterozygosity (0.44) were from cattle in Bohol lowland rainfed area and thelowest, in Siquijor (0.24). The highest genetic identity (0.977) was exhibited by tbe cattle from upland and lowland rainfed areas of Bohol while the farthest genetic distance (0.435) was from Cebu and Siquijor lowland rainfed areas. Siquijor cattle were distantly related to Cebu, Negros Oriental and Bohol cattle.