Comparative Analysis of Genome Diversity in Bullmastiff Dogs.

Management and preservation of genomic diversity in dog breeds is a major objective for maintaining health. The present study was undertaken to characterise genomic diversity in Bullmastiff dogs using both genealogical and molecular analysis. Genealogical analysis of diversity was conducted using a...

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Main Authors: Sally-Anne Mortlock, Mehar S Khatkar, Peter Williamson
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2016-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC4732815?pdf=render
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spelling doaj-9356977df3c7489687a0dd44295fe20a2020-11-25T02:35:19ZengPublic Library of Science (PLoS)PLoS ONE1932-62032016-01-01111e014794110.1371/journal.pone.0147941Comparative Analysis of Genome Diversity in Bullmastiff Dogs.Sally-Anne MortlockMehar S KhatkarPeter WilliamsonManagement and preservation of genomic diversity in dog breeds is a major objective for maintaining health. The present study was undertaken to characterise genomic diversity in Bullmastiff dogs using both genealogical and molecular analysis. Genealogical analysis of diversity was conducted using a database consisting of 16,378 Bullmastiff pedigrees from year 1980 to 2013. Additionally, a total of 188 Bullmastiff dogs were genotyped using the 170,000 SNP Illumina CanineHD Beadchip. Genealogical parameters revealed a mean inbreeding coefficient of 0.047; 142 total founders (f); an effective number of founders (fe) of 79; an effective number of ancestors (fa) of 62; and an effective population size of the reference population of 41. Genetic diversity and the degree of genome-wide homogeneity within the breed were also investigated using molecular data. Multiple-locus heterozygosity (MLH) was equal to 0.206; runs of homozygosity (ROH) as proportion of the genome, averaged 16.44%; effective population size was 29.1, with an average inbreeding coefficient of 0.035, all estimated using SNP Data. Fine-scale population structure was analysed using NETVIEW, a population analysis pipeline. Visualisation of the high definition network captured relationships among individuals within and between subpopulations. Effects of unequal founder use, and ancestral inbreeding and selection, were evident. While current levels of Bullmastiff heterozygosity, inbreeding and homozygosity are not unusual, a relatively small effective population size indicates that a breeding strategy to reduce the inbreeding rate may be beneficial.http://europepmc.org/articles/PMC4732815?pdf=render
collection DOAJ
language English
format Article
sources DOAJ
author Sally-Anne Mortlock
Mehar S Khatkar
Peter Williamson
spellingShingle Sally-Anne Mortlock
Mehar S Khatkar
Peter Williamson
Comparative Analysis of Genome Diversity in Bullmastiff Dogs.
PLoS ONE
author_facet Sally-Anne Mortlock
Mehar S Khatkar
Peter Williamson
author_sort Sally-Anne Mortlock
title Comparative Analysis of Genome Diversity in Bullmastiff Dogs.
title_short Comparative Analysis of Genome Diversity in Bullmastiff Dogs.
title_full Comparative Analysis of Genome Diversity in Bullmastiff Dogs.
title_fullStr Comparative Analysis of Genome Diversity in Bullmastiff Dogs.
title_full_unstemmed Comparative Analysis of Genome Diversity in Bullmastiff Dogs.
title_sort comparative analysis of genome diversity in bullmastiff dogs.
publisher Public Library of Science (PLoS)
series PLoS ONE
issn 1932-6203
publishDate 2016-01-01
description Management and preservation of genomic diversity in dog breeds is a major objective for maintaining health. The present study was undertaken to characterise genomic diversity in Bullmastiff dogs using both genealogical and molecular analysis. Genealogical analysis of diversity was conducted using a database consisting of 16,378 Bullmastiff pedigrees from year 1980 to 2013. Additionally, a total of 188 Bullmastiff dogs were genotyped using the 170,000 SNP Illumina CanineHD Beadchip. Genealogical parameters revealed a mean inbreeding coefficient of 0.047; 142 total founders (f); an effective number of founders (fe) of 79; an effective number of ancestors (fa) of 62; and an effective population size of the reference population of 41. Genetic diversity and the degree of genome-wide homogeneity within the breed were also investigated using molecular data. Multiple-locus heterozygosity (MLH) was equal to 0.206; runs of homozygosity (ROH) as proportion of the genome, averaged 16.44%; effective population size was 29.1, with an average inbreeding coefficient of 0.035, all estimated using SNP Data. Fine-scale population structure was analysed using NETVIEW, a population analysis pipeline. Visualisation of the high definition network captured relationships among individuals within and between subpopulations. Effects of unequal founder use, and ancestral inbreeding and selection, were evident. While current levels of Bullmastiff heterozygosity, inbreeding and homozygosity are not unusual, a relatively small effective population size indicates that a breeding strategy to reduce the inbreeding rate may be beneficial.
url http://europepmc.org/articles/PMC4732815?pdf=render
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