Laparoscopic ovum pick-up (LOPU) en ovejas Rasa aragonesa portadoras o no del alelo FecXR del gen BMP15: rendimiento, diámetro folicular y efecto del tratamiento estimulatorio con FSH
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Date
2011
Authors
Lahoz Crespo, BelénFolch Pera, José
Cocero Oviedo, Mª Jesús
Echegoyen Pérez, Elías
Sánchez Ruiz, Pilar
Alabart Alvarez, José Luis
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conferenceObjectAbstract
A new polymorphism in the Bone Morphogenetic Protein 15 gene (FecXR
allele) causing increased prolificacy in heterozygous ewes (R+) by an increase in ovulation
rate has been recently described in Rasa Aragonesa ewes. Data from 2,172 follicles
aspirated by the LOPU technique, with and without FSH treatment, in 16 R+ and 16 non
carrier (++) ewes during 11 sessions were analyzed. Without FSH, the number of follicles
present in the ovary was not significantly different between R+ and ++ ewes (9.7 and 9.2,
respectively). FSH treatment led to 17.8 follicles in R+ ewes, mainly increasing 4 and 5 mm
follicles (+11.2% and 9.7%, P<0.0001 for both) while in ++ ewes it produced 15.3 follicles, by
increasing the percentage of 5, 6 and >6 mm follicles (+11.7% P<0.0001, +6.9% P<0.01 and
+5.6% P<0.05, respectively). In conclusion, R+ ewes did not present a higher number of
ovarian follicles, but their follicular population presented a significantly lower diameter.
Further studies are necessary to determine if FSH sensitivity is increased in ewes carrying
this polymorphism.
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Keywords
Morphogenetic Protein 15, Gonadotropins, OPU, Sheep
Bibliographic citation
Lahoz, B., Folch, J., Cocero, M.J., Echegoyen, E. , Sánchez, P. y Alabart, J.L. “Laparoscopic ovum pick-up (LOPU) en ovejas Rasa aragonesa portadoras o no del alelo FecXR del gen BMP15: rendimiento, diámetro folicular y efecto del tratamiento estimulatorio con FSH”. En: 41 Jornadas de Estudio. XIV Jornadas sobre Producción Animal. AIDA. Zaragoza, España, 17 y 18 de mayo de 2011, pp.347-349. ISBN: 978-84-615-0062-8
Other field subjects
Raza Rasa aragonesaRazas indígenas
Ovinos
Genes
Reproductividad
Producción y sanidad animal