Identifying native animals in crossbred populations: the case of the Sardinian goat population

The aim of this work was to develop a strategy for using a genetic analysis for identifying native animals in regions where local breeds have been crossed with improved breeds and then compare that strategy to the overall morphology and breeding histories of the herds for identifying these animals....

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Published in:Animal genetics 2007-12, Vol.38 (6), p.614-620
Main Authors: Sechi, T, Usai, M.G, Miari, S, Mura, L, Casu, Sara, Carta, A
Format: Article
Language:English
Subjects:
Alleles
Animals
Cluster Analysis
Conservation of Natural Resources
genetic diversity
Genetic Variation
Genome
Genotype
Goats - classification
Goats - genetics
Hybridization, Genetic
Italy
Microsatellite Repeats
microsatellites
native breed
Phylogeny
private alleles
Sardinian goat
Software
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cited_by cdi_FETCH-LOGICAL-c4605-1771c2d39262f509097a19443da025ade180d0d37ffee70a83f9dec9845abc433
cites cdi_FETCH-LOGICAL-c4605-1771c2d39262f509097a19443da025ade180d0d37ffee70a83f9dec9845abc433
container_end_page 620
container_issue 6
container_start_page 614
container_title Animal genetics
container_volume 38
creator Sechi, T
Usai, M.G
Miari, S
Mura, L
Casu, Sara
Carta, A
description The aim of this work was to develop a strategy for using a genetic analysis for identifying native animals in regions where local breeds have been crossed with improved breeds and then compare that strategy to the overall morphology and breeding histories of the herds for identifying these animals. The experiment included the Sardinian goat population, which is a crossbred of native animals with the Maltese breed. Whole herds were assigned to Maltese (five herds; 49 animals), crossbred (18 herds; 117 animals) or Sardinian (12 herds; 164 animals) groups. For the genetic analysis, genotypes of 22 microsatellites were determined on 330 animals, and basic measurements of genetic diversity were calculated. Genetic variability in the microsatellites was different in the three groups. High positive FIS showed that inbreeding existed in the subpopulations. The index of genetic differentiation, Nei's standard genetic distance and Reynolds' genetic distance were calculated and found to be significantly different between the three groups. The Sardinian and Maltese groups were the most distant whereas the crossbred group was closer to the Sardinian group. The proportion of the genome derived from two ancestral populations (native Sardinian and Maltese) was assessed using the structure software. Animals were assigned to three clusters on the basis of native Sardinian thresholds. A good correspondence between the empirical (morphology and breeding histories) and the objective genetic analysis was found. Both approaches indicate the presence of three different subpopulations in the Sardinian goat population.
doi_str_mv 10.1111/j.1365-2052.2007.01655.x
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subjects Alleles
Animals
Cluster Analysis
Conservation of Natural Resources
genetic diversity
Genetic Variation
Genome
Genotype
Goats - classification
Goats - genetics
Hybridization, Genetic
Italy
Microsatellite Repeats
microsatellites
native breed
Phylogeny
private alleles
Sardinian goat
Software
title Identifying native animals in crossbred populations: the case of the Sardinian goat population
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