Genetic diversity in the Belgian Draught Horse breed as revealed by pedigree analysis and molecular marker data

Janssens, Steven; Stinckens, Anneleen; Schroyen, Martine; Peeters, Liesbet M.; Keyser, K. De; Wael, Rhea De; Lamberigts, Chris; Luyten, Tom; Ons, Ellen; Buys, Nadine

doi:10.1111/j.1365-2052.2010.02114.x

Cited by 9 publications

(11 citation statements)

References 9 publications

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“…The parameters in Table III show that both subpopulations have a diverse origin expressed in a large number of founders compared with the results presented in other populations of horses (Hamman & Distl, 2008;Janssens et al, 2010;Bartolomé et al, 2011;Schurink et al, 2012). The number of founders represented a similar proportion of each subpopulation, 0.32 in JH and 0.38 in DH.…”

Section: Characterisation Of the Subpopulationssupporting

confidence: 57%

Genetic connections between dressage and show-jumping horses in Dutch Warmblood horses

Rovere

Madsen

Norberg

et al. 2014

Acta Agriculturae Scandinavica, Section A — Animal Science

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During the last decades, the breeding practice within the Dutch Warmblood studbook (KWPN) has resulted in an increasing specialisation of horses into show-jumping (JH) and dressage (DH). The objective of this study was to describe the effect of the specialisation on the connectedness between the subpopulations of JH and DH horses registered by KWPN. The subpopulations comprised 23,800 JH horses and 18,125 DH horses, born between 1995 and 2009. Genetic similarity (GS), genetic pool in common (GC x ) based on the marginal genetic contribution of common ancestors and coefficient of relationship (r) between and within subpopulations were analysed in three periods of time to describe changes in genetic connectedness between subpopulations. A decline in GS (0.97-0.45), GC 0.5 (0.69-0.13) and r (0.018-0.014) in the recent years was observed. Both subpopulations have a common genetic pool; however, if the specialisation process continues, it will result in two unrelated (genetic) groups.

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Section: Characterisation Of the Subpopulationssupporting

confidence: 57%

Genetic connections between dressage and show-jumping horses in Dutch Warmblood horses

Rovere

Madsen

Norberg

et al. 2014

Acta Agriculturae Scandinavica, Section A — Animal Science

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“…The extent of this ‘censoring’ could unfortunately not be determined (age and reason of death are not recorded by the studbook). However, a low average age as well as lower generation interval in Belgian Draught Horses compared to other horse breeds had been demonstrated, so the effect of censoring might be restricted (Janssens et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Genetic parameters for chronic progressive lymphedema in Belgian Draught Horses

Keyser

Janssens

Peeters

et al. 2014

J Animal Breeding Genetics

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Genetic parameters for chronic progressive lymphedema (CPL)-associated traits in Belgian Draught Horses were estimated, using a multitrait animal model. Clinical scores of CPL in the four limbs/horse (CPLclin ), skinfold thickness and hair samples (hair diameter) were studied. Due to CPLclin uncertainty in younger horses (progressive CPL character), a restricted data set (D_3+) was formed, excluding records from horses under 3 years from the complete data set (D_full). Age, gender, coat colour and limb hair pigmentation were included as fixed, permanent environment and date of recording as random effects. Higher CPLclin certainty (D_3+) increased heritability coefficients of, and genetic correlations between traits, with CPLclin heritabilities (SE) for the respective data sets: 0.11 (0.06) and 0.26 (0.05). A large proportion of the CPLclin variance was attributed to the permanent environmental effect in D_full, but less in D_3+. Date of recording explained a proportion of variance from 0.09 ± 0.03 to 0.61 ± 0.08. Additive genetic correlations between CPLclin and both skinfold thickness and hair diameter showed the latter two traits cannot be used as a direct diagnostic aid for CPL. Due to the relatively low heritability of CPLclin , selection should focus on estimated breeding values (from repeated clinical examinations) to reduce CPL occurrence in the Belgian Draught Horse.

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“…Previous pedigree analyses have revealed genetic diversity in several horse breeds, including Hanoverian warmblood (Hamann & Distl ), Belgian draught (Janssens et al . ) and Franches‐Montagnes (Hasler et al . ), and as well as in donkey breeds, including Pega (Santana & Bignardi ), Martina Franca (Rizzi et al .…”

Section: Discussionmentioning

confidence: 99%

“…Pedigree analysis, conducted in several horse breeds, has been a useful approach for this purpose (Hamann & Distl ; Janssens et al . ; Hasler et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…Despite the need to ascertain genetic diversity when planning conservation programs, the genetic diversity and degree of inbreeding within the HKD population have not yet been investigated. Pedigree analysis, conducted in several horse breeds, has been a useful approach for this purpose (Hamann & Distl 2008;Janssens et al 2010;Hasler et al 2011). Therefore, in the present study, the chronological and geographical trends in genetic diversity and inbreeding among the recent HKD population born from 1986 to 2015 were analyzed by using pedigree data.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of genetic diversity and inbreeding in a Japanese native horse breed for suggestions on its conservation

Onogi

Shirai²,

Amano

2017

Animal Science Journal

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Because native breeds can serve as genetic resources for adapting to environment changes, their conservation is important for future agroecosystems. Using pedigree analysis, we investigated genetic diversity and inbreeding in Japanese Hokkaido native horses, which have adapted to a cold climate and roughage diet. Genetic diversity was measured as the number of founders and the effective number of founders, ancestors and genomes. All metrics imply a decrease in genetic diversity. A comparison of these metrics suggested that pedigree bottlenecks contributed more than did random gene losses to the reduction of genetic diversity. Estimates of marginal contributions of ancestors suggest that the bottlenecks arose mainly because related stallions had been used for breeding. A tendency for an increase in inbreeding coefficients was observed. F-statistics revealed that a small effective population size majorly contributed to this increase, although non-random mating in particular regions also contributed. Because the bottlenecks are thought to have reduced the effective population size, our results imply that mitigation of bottlenecks is important for conservation. To this end, breeding should involve genetically diverse stallions. In addition, to prevent non-random mating observed in particular regions, efforts should be made to plan mating with consideration of kinships.

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Genetic diversity in the Belgian Draught Horse breed as revealed by pedigree analysis and molecular marker data

Cited by 9 publications

References 9 publications

Genetic connections between dressage and show-jumping horses in Dutch Warmblood horses

Genetic connections between dressage and show-jumping horses in Dutch Warmblood horses

Genetic parameters for chronic progressive lymphedema in Belgian Draught Horses

Investigation of genetic diversity and inbreeding in a Japanese native horse breed for suggestions on its conservation

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