| Five bovine milk protein polymorphisms were studied in Zebuine cattle raised in Brazil, through horizontal electrophoresis on starch gel containing urea and 2-mercaptoethanol, using basic and acidic buffer systems. Allelic frequencies for <FONT FACE="Symbol">a</FONT>-La, <FONT FACE="Symbol">b</FONT>-Lg, <FONT FACE="Symbol">a</FONT>S1-Cn, <FONT FACE="Symbol">b</FONT>-Cn and <FONT FACE="Symbol">k</FONT>-Cn loci were estimated in six Gyr herds (N = 283), six Guzerat herds (N = 205), one Nelore herd (N = 17) and one Sindi herd (N = 22), all from São Paulo or Minas Gerais State, Brazil. Genotypic frequencies observed for each locus and breed studied are in accordance with the assumption of genetic... |
