Prevalence of twin foaling and blood chimaerism in purebred Spanish horses.

作者信息

Anaya G, Fernández M E, Valera M, Molina A, Azcona F, Azor P, Solé M, Moreno-Millán M, Demyda-Peyrás S

机构信息

Laboratorio de Diagnóstico Genético Veterinario, Departamento de Genética, Universidad de Córdoba, CN IV KM 396, Edificio Gregor Mendel, Campus Rabanales, Córdoba 14071, España.

Instituto de Genética Veterinaria 'Ing. Fernando N. Dulout' (UNLP-CONICET LA PLATA), Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, 1900 La Plata, Argentina.

出版信息

Vet J. 2018 Apr;234:142-144. doi: 10.1016/j.tvjl.2018.02.011. Epub 2018 Mar 21.

DOI:10.1016/j.tvjl.2018.02.011

PMID:29680387

Abstract

Twin foaling is associated with chimaerism in several domestic species and is recognised in horses. In this study, 21,097 purebred Spanish (Pura Raza Español) horse births from the 2015 to 2016 breeding season were investigated for chimaerism. Twin foaled and chimaeric individuals were assessed on the basis of foaling records, short-tandem repeat (STR) parentage test results and a sex-linked STR-based technique. Fourteen twin pregnancies with 23 twin foals born alive were identified (0.066% twin foaling prevalence), including five blood chimaeric cases (21.7%; overall prevalence 0.011%), suggesting that this genetic condition is extremely low in horses. Furthermore, no true chimaeras were detected. This is the first large scale study analysing the occurrence of chimaerism in a horse population and the first assessment of twin foaling in purebred Spanish horses.

摘要