Consanguinidad y estimación de parámetros genéticos para morfología del caballo Lusitano en México

Domínguez-Viveros, Joel; Rodríguez-Almeida, Felipe Alonso; Ortega-Gutiérrez, Juan Ángel

doi:10.4321/s0004-05922014000100004

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…mounted police) purposes (Loroño-Pino et al, 2003;Velázquez-Beltrán et al, 2011;Cantú-Martínez et al, 2012;Sánchez-Casanova et al, 2014). However, a significant number of horses in Mexico are purebred, mainly promoted by four official horse breeding associations that manage the studbooks for breeds such as the Pura Raza Española, Lusitano, Azteca, Westphalian, Holsteiner, Dutch and Belgian warmbloods, Selle Français, Hanoverian, Thoroughbred, Quarter Horse and Arabian (CONARGEN, 2017;Domínguez-Viveros et al, 2014). Purebred horses in Mexico are used for several equestrian events, including horse racing, Olympic disciplines and traditional equestrian competitions known as charreadas (Palomar, 2004;Cantú-Martínez et al, 2012;Pineda and Díaz, 2012;Rodríguez-Sánchez et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Diversity and effective population size of four horse breeds from microsatellite DNA markers in South-Central Mexico

et al. 2017

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Abstract. The South-Central region of Mexico has experienced a sizeable introduction of purebred horses for recreational aims. A study was designed to assess effective population sizes and genetic diversity and to verify the genetic integrity of four horse breeds. Using a 12-microsatellite panel, Quarter Horse, Azteca, Thoroughbred and Creole (CRL) horses were sampled and analysed for diversity and genetic structure. Genetic diversity parameters showed high numbers of heterozygous horses but small effective population sizes in all breeds. Population structure results suggested some degree of admixture of CRL with the other reference breeds. The highly informative microsatellite panel allowed the verification of diversity in introduced horse populations and the confirmation of small effective population sizes, which suggests a risk for future breed integrity.

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Section: Introductionmentioning

confidence: 99%

Diversity and effective population size of four horse breeds from microsatellite DNA markers in South-Central Mexico

et al. 2017

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How Depressing Is Inbreeding? A Meta-Analysis of 30 Years of Research on the Effects of Inbreeding in Livestock

Doekes

Bijma

Windig

2021

Genes

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Inbreeding depression has been widely documented for livestock and other animal and plant populations. Inbreeding is generally expected to have a stronger unfavorable effect on fitness traits than on other traits. Traditionally, the degree of inbreeding depression in livestock has been estimated as the slope of the linear regression of phenotypic values on pedigree-based inbreeding coefficients. With the increasing availability of SNP-data, pedigree inbreeding can now be replaced by SNP-based measures. We performed a meta-analysis of 154 studies, published from 1990 to 2020 on seven livestock species, and compared the degree of inbreeding depression (1) across different trait groups, and (2) across different pedigree-based and SNP-based measures of inbreeding. Across all studies and traits, a 1% increase in pedigree inbreeding was associated with a median decrease in phenotypic value of 0.13% of a trait’s mean, or 0.59% of a trait’s standard deviation. Inbreeding had an unfavorable effect on all sorts of traits and there was no evidence for a stronger effect on primary fitness traits (e.g., reproduction/survival traits) than on other traits (e.g., production traits or morphological traits). p-values of inbreeding depression estimates were smaller for SNP-based inbreeding measures than for pedigree inbreeding, suggesting more power for SNP-based measures. There were no consistent differences in p-values for percentage of homozygous SNPs, inbreeding based on runs of homozygosity (ROH) or inbreeding based on a genomic relationship matrix. The number of studies that directly compares these different measures, however, is limited and comparisons are furthermore complicated by differences in scale and arbitrary definitions of particularly ROH-based inbreeding. To facilitate comparisons across studies in future, we provide the dataset with inbreeding depression estimates of 154 studies and stress the importance of always reporting detailed information (on traits, inbreeding coefficients, and models used) along with inbreeding depression estimates.

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Consanguinidad y estimación de parámetros genéticos para morfología del caballo Lusitano en México

Cited by 2 publications

References 14 publications

Diversity and effective population size of four horse breeds from microsatellite DNA markers in South-Central Mexico

Diversity and effective population size of four horse breeds from microsatellite DNA markers in South-Central Mexico

How Depressing Is Inbreeding? A Meta-Analysis of 30 Years of Research on the Effects of Inbreeding in Livestock

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