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Título
Evolución de un programa de inseminación en la raza Assaf en la provincia de León
Autor
Facultad/Centro
Área de conocimiento
Datos de la obra
XXXIX Jornadas de Estudio. XIII Jornadas sobre Producción Animal. T. II
Editor
Asociación Interprofesional para el Desarrollo Agrario
Fecha
2009
ISBN
978-84-613-2311-1
Descripción física
P. 675-677
Abstract
The Assaf breed has mostly been allocated in Castilla y León, particularly in
the province of León. In 1998, a selection and genetic improvement programme was initiated
for milk production in 38 flocks. Training of rams for semen collection using an artificial
vagina reached a success rate of 74%, and the percentage of valid ejaculates has reached
90%. Fertility results of artificial insemination (lambing rates) have fluctuated between 35% y
40% since the programme was started. We found that fertility drops in ewes older than 4
years, and that it improved about 10% in the breeding season.
Materia
Palabras clave
Idioma
spa
Tipo documental
info:eu-repo/semantics/bookPart
URI
Collections
- Capítulos de monografías [979]
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