Freemartinism in replacement ewe-lambs of the Ripollesa sheep breed
Marí Torres, Pilar (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Casellas Vidal, Joaquim (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Date:	2018
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 ± 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.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Ripollesa breed ; Freemartin ; Sheep
Published in:	Journal of Veterinary Science, Vol. 19 (november 2018) , p. 858-861, ISSN 1976-555X

DOI: 10.4142/jvs.2018.19.6.858
PMID: 30304885

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