Relationship Between the Genetic Marker BM4505 and Some Productive and Physiological Traits of Holstein Friesian Cows

Abstract

Abstract The results of the study showed two genetic polymorphisms of the BM4505 marker for the studied samples: 270/260, 280/271 bp, their distribution ratio was 60.34 and 39.66 %, respectively, which showed highly significant differences (P≤0.01) among genetic polymorphisms. The study showed that there were significant (P≤0.05) differences between the 270/260,280/271 bp genetic polymorphisms by the California mastitis test, the cows carrying the genetic polymorphisms 270/260 bp, where the test value was 1.20 on the genetic polymorphisms 280/271 bp, the test value was 2.47, as for the other studied traits, the study showed that there were no significant differences between the genetic polymorphisms.