Genomic DNA was isolated from bovine milk somatic cells. Three milliliters
(minipreps) and 30 mi (maxipreps) of milk samples were processed for isolat
ion of genomic DNA. Use of this DNA for genotyping of cattle based on alpha
-lactalbumin loci by polymerase chain reaction - restriction fragment lengt
h polymorphism (PCR-RFLP) indicated that milk somatic cells can be an easy
and reliable source of DNA for genotyping of farm animals or any other enzy
matic reactions.