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1.
Evol Appl ; 14(11): 2618-2634, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34815743

ABSTRACT

Iberian wild goats (Capra pyrenaica, also known as Iberian ibex, Spanish ibex, and Spanish wild goat) underwent strong genetic bottlenecks during the 19th and 20th centuries due to overhunting and habitat destruction. From the 1970s to 1990s, augmentation translocations were frequently carried out to restock Iberian wild goat populations (very often with hunting purposes), but they were not systematically planned or recorded. On the other hand, recent data suggest the occurrence of hybridization events between Iberian wild goats and domestic goats (Capra hircus). Augmentation translocations and interspecific hybridization might have contributed to increase the diversity of Iberian wild goats. With the aim of investigating this issue, we have genotyped 118 Iberian wild goats from Tortosa-Beceite, Sierra Nevada, Muela de Cortes, Gredos, Batuecas, and Ordesa and Monte Perdido by using the Goat SNP50 BeadChip (Illumina). The analysis of genotypic data indicated that Iberian wild goat populations are strongly differentiated and display low diversity. Only three Iberian wild goats out from 118 show genomic signatures of mixed ancestry, a result consistent with a scenario in which past augmentation translocations have had a limited impact on the diversity of Iberian wild goats. Besides, we have detected eight Iberian wild goats from Tortosa-Beceite with signs of domestic goat introgression. Although rare, hybridization with domestic goats could become a potential threat to the genetic integrity of Iberian wild goats; hence, measures should be taken to avoid the presence of uncontrolled herds of domestic or feral goats in mountainous areas inhabited by this iconic wild ungulate.

2.
Vet. Méx ; 29(2): 137-45, abr.-jun. 1998. tab, graf
Article in Spanish | LILACS | ID: lil-241036

ABSTRACT

Para estudiar la supervivencia de embriones transferidos a receptoras sincronizadas con FGA y PMSG, tratadas con hormonas de crecimiento porcina (GHp) al retiro de las esponjas, se realizaron dos experimentos sobre ovejas de la raza Rasa Aragonesa. El experimento 1 utilizó 12 ovejas donantes para transferir un embrión viable a receptoras tratadas (R1; n=29) o no tratadas (R2; n=28) con GHp. La tasa de ovulación (TO) y los niveles de progesterona (P4) resultaron más altos (P <0.01) que las R2. Este último se relacionó directamente con la aplicación directamente con la aplicación exógena de la GHp, mostrando una alta correlación (P < 0.01) entre la concentración de P4 del día 4 y la del día 17 posfecundación, sin diferencias de fertilidad entre tratamientos. En el experimento 2, con 14 ovejas donantes se obtuvieron 95 embriones viables de 2 días, de edad transfiriendo únicamente 68 (8-10 embriones por grupo) a 4 receptoras tratadas con GHp (R1) y a 4 no tratadas (R2). Estos mismos embriones recuperados tres día después a nivel del útero, fueron valorados morfológicamente. Se observó un aumento de la TO (P < 0.05) de las ovejas receptoras tratadas con GHp (R1). La recuperación de embriones fue mayor en las ovejas tratadas con GHp, con una tendencia a una mayor calidad de los embriones (P < 0.2). En conclusión: a) En ovejas receptoras tratadas con FGA y PMSG, la aplicación de GH produce un aumento de la TO y concentración plasmática de P4, cuatro días después de retirar el progestágeno, b) la fertilidad de embriones transferidos no se modifica si se trata con GH a las ovejas receptoras


Subject(s)
Animals , Female , Pregnancy , Cattle , Oviducts , Sheep , Growth Hormone/administration & dosage , Estradiol/adverse effects , Fetal Viability , Pregnancy Rate , Ovulation Induction , Pregnancy, Animal , Embryo Transfer/methods
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