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http://dx.doi.org/10.4142/jvs.2018.19.6.858

Freemartinism in replacement ewe-lambs of the Ripollesa sheep breed

Mari, Pilar (Department of Animal and Food Science, Autonomous University of Barcelona)
Casellas, Joaquim (Department of Animal and Food Science, Autonomous University of Barcelona)

Publication Information

Journal of Veterinary Science / v.19, no.6, 2018 , pp. 858-861 More about this Journal

Abstract

The freemartinism syndrome affects almost all female calves born as co-twins to male calves, whereas little is known about this phenomenon in female sheep. Within this context, 1,185 ewe-lambs from the Ripollesa sheep breed were genotyped for the presence of oY1 polymorphism (a non-autosomal region of the Y chromosome). Neither ewe-lambs from single births (856) nor ewe-lambs from all-female multiple births (170) were revealed as freemartins, whereas five of 159 ewe-lambs from multiple births with male co-twins were freemartins ( $3.15{\pm}1.38%$ ). All freemartin ewe-lambs were confirmed by physical examination of external genitalia. The results confirm a low incidence of freemartinism from heterosexual twin pregnancies in Ripollesa sheep.

Keywords

Ripollesa breed; freemartin; sheep;

Citations & Related Records

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