Population study of the t1;29 translocation in Andalusian minority cattle breeds

SEBASTIÁN DEMYDA PEYRÁS; ANTONIO RODERO FRANGANILLO; EVANGELINA RODERO SERRANO; ANA GONZALEZ MARTINEZ; ENRIQUE GÉNERO; MIGUEL MORENO MILLÁN

Córdoba

Congreso; 20th Colloquium of Animal Cytogenetics and Gene Mapping; 2012

Universidad de Córdoba

The prevalence of the of t1;29 translocation in the five minority Andalusian endangered cattle breeds has been assessed used in order to study the influence in the population. A total of 714 animals were analyzed over 5 last years as part of an official program to evaluate and control de reproductive losses produced by this genetic trait. Our results indicates that t1;29 prevalence is variable as much within breeds and sex of the animals studied (Table 1).We found that very similar breeds as the two Berrendo?s, normally raised in the same farms, have shown different prevalences, mostly in the females. In Berrendo en Negro, the breed with more homozygous bulls detected, we observed that the incidence of the translocation was one of the higher. In this sense, the rates found in the Pajuna breed, the most endangered one with only 688 live animals, were extremely high, both in males and females, causing that the effective population of this breed free of the genetic disorder is very low. Public programs are currently underway to control the incidence and reproductive effect on this cattle breeds. Further detailed studies over time will be performed to assess their progress.