Genetic diversity, structure and individual assignment of Casta Navarra cattle: a well-differentiated fighting bull population

Summary The Casta Navarra lineage was one of the populations used to establish the fighting bull (FB) breed, and it has also been reproductively isolated from the others FBs. A total of 1284 individuals from two generations of 16 Casta Navarra herds were sampled to analyse their diversity, their gen...

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Bibliographic Details
Published in:Journal of animal breeding and genetics (1986) 2014-02, Vol.131 (1), p.11-18
Main Authors: Sanz, A., Martin-Burriel, I., Cons, C., Reta, M., Poblador, A., Rodellar, C., Zaragoza, P.
Format: Article
Language:English
Subjects:
Admixture
Animal breeding
Animal reproduction
Animals
Bayes Theorem
breed assignment
Breeding
Casta Navarra
Cattle
fighting bull population
Genetic diversity
genetic structure
Genetic Variation
Genetics, Population
Heterozygote
Microsatellite Repeats - genetics
microsatellites
Phylogenetics
Phylogeny
subdivided populations
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Summary:Summary The Casta Navarra lineage was one of the populations used to establish the fighting bull (FB) breed, and it has also been reproductively isolated from the others FBs. A total of 1284 individuals from two generations of 16 Casta Navarra herds were sampled to analyse their diversity, their genetic structure and the ability of 28 microsatellite markers to assign individuals to closely related populations. These animals were compared with closely related phylogenetic (FB) or geographical (Pirenaica and Monchina) populations. Hardy–Weinberg equilibrium analysis showed that 82% of the loci had a significant heterozygote deficit as a consequence of the Wahlund effect. The average proportion of genetic variation explained by farm differences was 9% by Wright's FST index. A phylogenetic tree constructed with a neighbour‐joining method based on Reynolds genetic distances and a Bayesian Markov chain Monte Carlo clustering approach revealed clear differences between farm groups that generally corresponded to historical information and could unambiguously differentiate Casta Navarra cattle from the other populations. The percentage of animals correctly assigned to the Casta Navarra population was 91.78% for a q threshold of >0.9. Admixture was only detected in 4.45% (q 
ISSN:0931-2668
1439-0388
DOI:10.1111/jbg.12037