首页 | 本学科首页   官方微博 | 高级检索  
     


Genetic variability in the endangered Asturcón pony assessed using genealogical and molecular information
Authors:L.J. Royo, I.   lvarez, J.P. Guti  rrez, I. Fern  ndez,F. Goyache
Affiliation:

aSERIDA-Somió, C/ Camino de los Claveles 604, E-33203 Gijón (Asturias), Spain

bDepartamento de Producción Animal, Facultad de Veterinaria, Avda. Puerta de Hierro s/n, E-28040-Madrid, Spain

Abstract:The aim of this analysis is to assess the genetic diversity in the black-coated Asturcón pony population using genealogical and molecular methods in order to ascertain the possible impact of the inclusion of the bay Asturcón individuals on the breed's recovery programme. Pedigree information registered in the studbook of the black-coated Asturcón (including a total of 1080 individuals) was analysed. Additionally, 261 blood samples from the black-coated Asturcón individuals were obtained and genotyped for 15 microsatellites. Furthermore, 58 blood samples were obtained and genotyped from bay Asturcón individuals in order to place the results within the context of an unselected population with no known genealogies. The results indicated high losses of genetic representation of founders in the present population of black-coated Asturcón ponies. Roughly 60% and 30% of the founder stallion and dam lines, respectively, are lost in the present population. Average inbreeding was 4.7%. The equivalent number of founders and equivalent number of ancestors were 18.1 and 13. The most relevant founders and ancestors identified belonged to the three major studs involved in the recovery of the breed. However, the results highlight the dependence of the breed on the management of the government-run Cayón stud, which has increased its genetic contribution to the breed over time from 35.6% to 50.1%. At a molecular level, genetic variability assessed in the black-coated Asturcón was lower than that observed in the bay Asturcón. Expected heterozygosity, FIS(m) and rarefacted average number of alleles per locus were 0.755 and 0.828, 4.1% and 1.3%, and 9.5 and 9.2, respectively, for the black-coated and bay Asturcón. The expected molecular coancestry in the black-coated Asturcón base population (Ef0) took a value of 0.229, which was near to the molecular coancestry computed in the bay Asturcón (0.231). Implications of the reported results in the recovery programme of the Asturcón pony breed are discussed.
Keywords:Horse   Genetic variability   Inbreeding   Coancestry   Microsatellites   Conservation programme
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号