Multi-trait animal model estimation of genetic parameters for morphometric measurements in the Murgese horse breed

Bramante, G.; Cito, A.M.; Ciani, Elena; Pieragostini, E.

doi:10.1016/j.livsci.2016.07.011

Cited by 12 publications

(9 citation statements)

References 8 publications

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“…In this case the linear coefficient of the estimated trend represents how breeding values increased from the basis in each year. The results found in this study were in accordance to those reported by Bramante et al (2016) in the Murgese horse and Vicente et al (2014b) in the Lusitano horse. These authors also found low coefficients for the linear increase on the breeding values in each observed year.…”

Section: Discussionsupporting

confidence: 92%

Genetic analysis of morphological and functional traits in Campolina horses using Bayesian multi-trait model

et al. 2018

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A B S T R A C TIn general, is said that functional traits have a positive genetic correlation with conformation in horses but, this hypothesis has never been investigated in the Brazilian Campolina breed. We aimed to estimate genetic parameters (heritabilities and genetic correlations) for these traits based on genealogical records from 107,951 animals, in which 43,159 were phenotyped. A total of 16 morphological traits (MT); one gaits score (GtS) and two traits related to conformation harmony (CH), were simultaneously analysed under a Bayesian multi-trait model framework. Genetic trends were estimated over the years of birth for animals born between 1951 and 2016. MT were all genetically positively associated (from 0.05 to 0.98). CH traits presented positive and negative genetic correlations, but all favourable to the selection goals. GtS was negatively associated with all MT, except for Chest Width (0.08). CH and GtS presented lower positive genetic correlation (0.10 and 0.01, for the ratio between Height at Withers and Height at Back, and ratio of Back-Loins Length over Body Length, respectively). Observed results indicated the existence of sufficient additive genetic variance (heritability estimates ranged from 0.07 to 0.43) for the studied traits, benefiting the implementation of a breeding program, if the desired is to select animals for morphology or gaits. All genetic trends were favorable despite of the phenotypic selection in the Campolina breed. These trends presented low regression coefficients, but the increase on average predicted breeding values for the investigated period was 137.9%.

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Section: Discussionsupporting

confidence: 92%

Genetic analysis of morphological and functional traits in Campolina horses using Bayesian multi-trait model

et al. 2018

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“…The genetic correlations (Table 3) between the morphological measurements in SAA were very similar to those estimated in Murgese (WH-CG 0.71 vs. 0.707, WH-BC 0.73 vs. 0.64 and CG-BC 0.74 vs. 0.709) [26]. The same genetic correlations in SAA were slightly higher than those reported in other breeds such as: 0.55 in Wielcopolsky horse [19], 0.40 in Pura Raza Español [8] and close to the values (0.76-0.84) estimated on Finnhorse trotter by Saastamoinen et al [27] The h 2 estimate for OS (0.23 ± 0.02) was very difficult to compare with other studies: in fact, it was an overall subjectively scored "ideal type" and there were many differences in the way of scoring, in the judged components and in the breeding goal [28].…”

Section: Discussionsupporting

confidence: 72%

“…Comparing the h 2 of SAA measurements with the values of Murgese, another Italian horse breed, it is possible to observe marked differences: the heritability estimations for the three traits WH, CG and BC were lower and respectively 0.27 (vs. 0.78 SAA), 0.31 (vs. 0.47 SAA) and 0.24 (vs. 0.57 SAA). It must be highlighted that the Murgese population is much smaller than SAA [26].…”

Section: Discussionmentioning

confidence: 97%

Genetic Parameters and Inbreeding Effect of Morphological Traits in Sardinian Anglo Arab Horse

Giontella

Sarti

Biggio

et al. 2020

Animals

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The purpose of this study was to estimate the heritability and genetic correlations of four biometric measurements and an overall score (OS) in the Sardinian Anglo-Arab horse (SAA); moreover, the effect of inbreeding on these traits was investigated. A dataset with 43,624 horses (27,052 females and 16,572 males) was provided by the Agricultural Research Agency of Sardinia (AGRIS). Cannon bone circumference (BC), chest girth (CG), shoulder length (SL), and withers height (WH) were measured on 6033 SAA horses born in Sardinia between 1967 and 2005; beside the measurements, an overall score (OS) was taken comparing the morphology of each horse to an “ideal type” that is scored out of 100. The mean value is 20.5 cm for BC, 185.9 cm for CG, 67.6 cm for SL, 160.8 cm for WH, and 73.2 for the OS. The heritability estimates ranged from 0.78 to 0.23. The results allow to foresee high genetic progress through the breeding programs. The most affected trait by the inbreeding rate seems to only be the withers height.

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“…This might be explained by sexual dimorphism in horses, where differences during postfoetal development between genders are expected T A B L E 5 Additive genetic ( 2 a ) and residual ( 2 e ) variances, heritability's estimation (h 2 ) and corresponding standard error (SE) for the ten grading traits (Pinto et al, 2008;Purzyc, Kobryńczuk, & Bojarski, 2011). A similar trend was observed in the Murgese and in the Lusitano horse breeds where, on average, mares were smaller than stallions (Bramante et al, 2016;Vicente, Carolino, Ralão-Duarte, & Gama, 2014). In the Lusitano breed, males tended to acquire lower scores in the evaluation compared to mares, a trend that was not observed in Bardigiano horses.…”

Section: Scoring Systemmentioning

confidence: 70%

“…However, there is a scarcity of research on genetic parameters estimation in local horse breeds, even though they could be used to create new genetic indices and be used to exploit the unique value of those breeds. Most of local horse population is facing the challenge to shift from agricultural to riding purposes (Bramante, Cito, Ciani, & Pieragostini, 2016;Giontella, Pieramati, Silvestrelli, & Sarti, 2018;Solé, Cervantes, Gutiérrez, Gómez, & Valera, 2014). The Bardigiano horse represents exactly this scenario since it is an old Italian horse breed and nowadays mainly used for equestrian purposes.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters estimation in an Italian horse native breed to support the conversion from agricultural uses to riding purposes

Ablondi

Summer

Vasini

et al. 2019

J Animal Breeding Genetics

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Horses are nowadays mainly used for sport and leisure purposes, and several local breeds, traditionally used in agriculture, are exposed to the risk of extinction. The long‐term survival of local horse breeds depends on strategies to both monitor their genetic diversity and to find their sustainable role in the equine market. Thus, several local horse breeds need to adapt their breeding objective to allow a modernization process. The Bardigiano is an example of such horse breeds; we, therefore, studied the existing evaluation protocol from a genetic standpoint to assess the protocol's suitability to convert the Bardigiano from an agricultural to a riding horse. To this end, we estimated genetic parameters for four conformation measurements, ten grading traits and 23 linear traits. For conformation measurements, the heritabilities ranged from 0.31 for cannon bone circumference to 0.63 for height at withers. For conformation and attitude grading traits, the highest heritability (0.34) was estimated for development and the lowest (0.09) for gaits. The heritabilities for linear traits ranged from 0.05 for the leg straightness to 0.32 for the coat colour. Genetic correlations between linear traits and corresponding grading traits varied considerably, ranging from −0.42 to 0.98. This study showed that the current evaluation protocol in the Bardigiano horse is appropriate for genetic evaluation. Genetic parameters estimation can, in turn, be used to develop novel breeding values to help this conversion. Our study paves the way to optimize the Bardigiano horse breeding programme, and it may help several other local horse breeds experiencing similar issues.

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Multi-trait animal model estimation of genetic parameters for morphometric measurements in the Murgese horse breed

Cited by 12 publications

References 8 publications

Genetic analysis of morphological and functional traits in Campolina horses using Bayesian multi-trait model

Genetic analysis of morphological and functional traits in Campolina horses using Bayesian multi-trait model

Genetic Parameters and Inbreeding Effect of Morphological Traits in Sardinian Anglo Arab Horse

Genetic parameters estimation in an Italian horse native breed to support the conversion from agricultural uses to riding purposes

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