Genetic Structure Analysis of the Pura Raza Español Horse Population through Partial Inbreeding Coefficient Estimation

The aim of this work was to analyze genetic parameters such as the inbreeding coefficient (F), relatedness coefficient (AR) and partial inbreeding coefficient (F ) of the whole PRE population, and the ancestors which account for 50% of the total genetic variability of the current population, from ge...

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Bibliographic Details
Published in:Animals (Basel) 2020-08, Vol.10 (8), p.1360
Main Authors: Perdomo-González, Davinia I, Sánchez-Guerrero, María J, Molina, Antonio, Valera, Mercedes
Format: Article
Language:English
Subjects:
Animal breeding
Animal husbandry
Animal populations
Animals
Artificial insemination
Biological research
Biology, Experimental
Breeding
Coefficients
common ancestors
Conformation
genealogical analysis
Genealogy
Generations
Genetic analysis
Genetic aspects
Genetic diversity
Genetic structure
Genetic variability
Horses
Inbreeding
Inbreeding depression
Population
Reproduction (biology)
Structural analysis
studbook
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Summary:The aim of this work was to analyze genetic parameters such as the inbreeding coefficient (F), relatedness coefficient (AR) and partial inbreeding coefficient (F ) of the whole PRE population, and the ancestors which account for 50% of the total genetic variability of the current population, from genealogical information. The average F of the whole PRE population (328,706 animals) has decreased from 8.45% to 7.51% in the least 20 years. The F was estimated for the whole PRE population, resulting in a database of 58,772,533 records containing one record for each F that each animal receives from a certain common ancestor (CA). A total of 10,244 CAs contributed to the F with an average of 5370 descendants, with each descendant having an average of 170 CAs. Over the generations, the number of CAs has increased, while the proportion of F by each one has decreased. In addition, the contributions of the more influential ancestors have changed. The increased census, the limited use of artificial insemination and our increased knowledge about inbreeding depression and the animals' breeding values allow breeders to select horses more for their functionality and conformation than for their pedigree reputation, which is the cause of all these changes.
ISSN:2076-2615
2076-2615
DOI:10.3390/ani10081360