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Animal : an international journal of animal bioscience2018; 1-10; doi: 10.1017/S175173111800023X

Pedigree analysis and inbreeding effects over morphological traits in Campolina horse population.

Abstract: Genetic improvement, without control of inbreeding, can go to loss of genetic variability, reducing the potential for genetic gains in the domestic populations. The aim of this study was to analyze the population structure and the inbreeding depression in Campolina horses. Phenotype information from 43 465 individuals was analyzed, data provided by the Campolina Breeders Association. A pedigree file containing 107 951 horses was used to connected the phenotyped individuals. The inbreeding coefficient was performed by use of the diagonal of the relationship matrix and the genealogical parameters were computed using proper softwares. The effective population size was estimated based on the rate of inbreeding and census information, and the stratification of the population was verified by the average relationship coefficient between animals born in different regions of Brazil. The effects of inbreeding on morphological traits were made by the use of inbreeding coefficient as a covariate in the model of random regression. The inbreeding coefficient increased from 1990 on, impacting effective population size and, consequently, shrinking genetic variability. The paternal inbreeding was greater than maternal, which may be attributed to the preference for inbred animals in reproduction. The average genetic relationship coefficient of animals born in different states was lower than individuals born within the same state. The increase in the inbreeding coefficient was negatively associated with all studied traits, showing the importance to avoid genetic losses in the long term. Although results do not indicate a severe narrowing of the population until the present date, the average relationship coefficient shows signs of increase, which could cause a drastic reduction in genetic variability if inbred mating is not successfully controlled in the Campolina horse population.
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Publication Date: 2018-02-22 PubMed ID: 29467044DOI: 10.1017/S175173111800023XGoogle Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article discusses a study conducted to observe the population structure and effects of inbreeding among the Campolina horse population from Brazil. The study determined that unchecked inbreeding can potentially diminish genetic diversity and negatively affect the population’s morphological traits.

Methodology

  • The researchers analyzed phenotype information from 43,465 individual Campolina horses, which was provided by the Campolina Breeders Association.
  • In connection to this, a pedigree file consisting of data from 107,951 horses was utilized to link the phenotyped individuals.
  • For calculation purposes, software was used to compute the genealogical parameters and the inbreeding coefficient was assessed via the diagonal of the relationship matrix.
  • The effective population size was calculated using the inbreeding rate and census information. Additionally, the stratification, i.e., the variation in the population was evaluated through the average relationship coefficient between horses born in different regions of Brazil.
  • To assess the influence of inbreeding on morphological traits, the inbreeding coefficient was employed as a covariate in the random regression model.

Findings

  • The study discovered that the inbreeding coefficient has been increasing since 1990, indicating a rise in inbred mating. This increase has influenced the effective population size by decreasing genetic variability.
  • The paternal inbreeding was observed to be higher than maternal inbreeding, hinting at a possible preference for inbred horses during reproduction.
  • Additionally, the average genetic relationship coefficient was lower for animals born in different states compared to those born within the same state, shedding light on regional breeding practices.
  • Crucially, the increase in the inbreeding coefficient has had negative associations with all studied traits, emphasizing the need to prevent long-term genetic losses.

Conclusions

  • Even though the study doesn’t demostrate an extreme shrinking of the population up until the current date, there are signs of increasing average relationship coefficients. This could potentially lead to a drastic decrease in genetic variability if inbred mating isn’t effectively managed within the Campolina horse population.

Cite This Article

APA
Bussiman FO, Perez BC, Ventura RV, Peixoto MGCD, Curi RA, Balieiro JCC. (2018). Pedigree analysis and inbreeding effects over morphological traits in Campolina horse population. Animal, 1-10. https://doi.org/10.1017/S175173111800023X

Publication

Animal : an international journal of animal bioscience
ISSN: 1751-732X
NlmUniqueID: 101303270
Country: England
Language: English
Pages: 1-10

Researcher Affiliations

Bussiman, F O
  • 1Department of Animal Science, College of Animal Science and Food Engineering,University of São Paulo (FZEA/USP),Av. Duque de Caxias Norte,225, Campus Fernando Costa,Pirassununga, São Paulo, 13.635-900,Brazil.
Perez, B C
  • 1Department of Animal Science, College of Animal Science and Food Engineering,University of São Paulo (FZEA/USP),Av. Duque de Caxias Norte,225, Campus Fernando Costa,Pirassununga, São Paulo, 13.635-900,Brazil.
Ventura, R V
  • 1Department of Animal Science, College of Animal Science and Food Engineering,University of São Paulo (FZEA/USP),Av. Duque de Caxias Norte,225, Campus Fernando Costa,Pirassununga, São Paulo, 13.635-900,Brazil.
Peixoto, M G C D
  • 4National Centre of Research on Dairy Cattle, Brazilian Agricultural Research Corporation (CNPGL/EMBRAPA), Rua Eugênio do Nascimento,610, Dom Bosco, Juiz de Fora, Minas Gerais, 36.038-330,Brazil.
Curi, R A
  • 5Department of Animal Improvement and Nutrition,College of Veterinary Medicine and Animal Science, São Paulo State University (FMVZ/UNESP),Rua José Barbosa de Barros, 1780,Fazenda Experimental Lageado,18.618-307, Botucatu, São Paulo,Brazil.
Balieiro, J C C
  • 6Department of Animal Nutrition and Production,College of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ/USP),Av. Duque de Caxias Norte, 225,Campus Pirassununga,Pirassununga, São Paulo, 13.635-900,Brazil.

Citations

This article has been cited 8 times.
  1. Cardinali I, Giontella A, Tommasi A, Silvestrelli M, Lancioni H. Unlocking Horse Y Chromosome Diversity.. Genes (Basel) 2022 Dec 2;13(12).
    doi: 10.3390/genes13122272pubmed: 36553539google scholar: lookup
  2. Perdomo-González DI, Laseca N, Demyda-Peyrás S, Valera M, Cervantes I, Molina A. Fine-tuning genomic and pedigree inbreeding rates in equine population with a deep and reliable stud book: the case of the Pura Raza Española horse.. J Anim Sci Biotechnol 2022 Nov 7;13(1):127.
    doi: 10.1186/s40104-022-00781-5pubmed: 36336696google scholar: lookup
  3. Doekes HP, Bijma P, Windig JJ. How Depressing Is Inbreeding? A Meta-Analysis of 30 Years of Research on the Effects of Inbreeding in Livestock.. Genes (Basel) 2021 Jun 18;12(6).
    doi: 10.3390/genes12060926pubmed: 34207101google scholar: lookup
  4. Tao L, He X, Wang F, Zhong Y, Pan L, Wang X, Gan S, Di R, Chu M. Luzhong mutton sheep: inbreeding and selection signatures.. J Anim Sci Technol 2020 Nov;62(6):777-789.
    doi: 10.5187/jast.2020.62.6.777pubmed: 33987559google scholar: lookup
  5. Próchniak T, Kasperek K, Knaga S, Rozempolska-Rucińska I, Batkowska J, Drabik K, Ziȩba G. Pedigree Analysis of Warmblood Horses Participating in Competitions for Young Horses.. Front Genet 2021;12:658403.
    doi: 10.3389/fgene.2021.658403pubmed: 33936176google scholar: lookup
  6. Poyato-Bonilla J, Perdomo-González DI, Sánchez-Guerrero MJ, Varona L, Molina A, Casellas J, Valera M. Genetic inbreeding depression load for morphological traits and defects in the Pura Raza Española horse.. Genet Sel Evol 2020 Oct 20;52(1):62.
    doi: 10.1186/s12711-020-00582-2pubmed: 33081691google scholar: lookup
  7. Perdomo-González DI, Sánchez-Guerrero MJ, Molina A, Valera M. Genetic Structure Analysis of the Pura Raza Español Horse Population through Partial Inbreeding Coefficient Estimation.. Animals (Basel) 2020 Aug 6;10(8).
    doi: 10.3390/ani10081360pubmed: 32781594google scholar: lookup
  8. Comparini L, Podestà A, Russo C, Cecchi F. Effect of inbreeding on the "Club Foot" disorder in Arabian Pureblood horses reared in Italy.. Open Vet J 2019 Oct;9(3):273-280.
    doi: 10.4314/ovj.v9i3.14pubmed: 31998623google scholar: lookup
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