Quantitative Aspects of Coat Color in Old Kladruber Black Horses

Hofmanová, B.; Kohoutová, Pavla; Vostrý, L.; Vydrová, Hana Vostrá; Majzlík, I.

doi:10.18047/poljo.21.1.sup.53

Cited by 2 publications

(8 citation statements)

References 9 publications

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“…The darkest areas were observed at the neck and croup measuring points, whereas the shoulder and belly were lighter. Lower values of L*a*b in measuring points of the dorsal body area were also observed by Hofmanova et al (7). In seal brown, which represents the darkest bay category, the typical characteristic is represented by lighter (L-value) and yellowish (b-value) colour measures around the axillary area.…”

Section: Discussionsupporting

confidence: 69%

“…Nevertheless, the background of the bright variety of shades within bay and chestnut is not fully resolved. In addition to studying environmental effects influencing colour shades (7,8), researchers have investigated genotype interactions of ASIP and MC1R (6,9,10); in these publications, the genotype combination A/a E/E was associated with darker shades of bay.…”

Section: Introductionmentioning

confidence: 99%

“…For the quantification of coat colour, the use of a spectrophotometer and the standardised L*a*b* colour system as defined by the Commission Internationale de l'Eclairage (CIE), has proven to be helpful in a series of studies. For example, this procedure was applied to investigate the greying process in Lipizzan (11) and Kladrub horses (7). It was further utilised for the estimation of additive genetic effects of coat colour in Noriker horses (12), Lipizzan, Nonius, Arabian Purebred, Shagya Arabian, Gidran (13), and Black Kladrub horses (7) and for quantifying genotype interactions in Noriker and Shagya Arabian horses (9).…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of Coat Colour in the Slovenian Posavje Horse

Grilz-Seger

Mesarič

Brem

et al. 2021

SVR

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Different approaches and classification systems have been established to describe equine coat colour, which varies between breeds and countries. In the present study, we first characterised the coat colour variability in the Slovenian Posavje Horse applying colour spectrophotometry following the CIE L*a*b system. As derived from the classification system of Sponenberg (light bay, bay, mahogany bay, brown and seal brown), the phenotype categories could be confirmed by spectrophotometric data. Furthermore, L*a*b values revealed comparable high phenotypic variability of bay coat colour in the Posavje breed, and the darker shades of bay coat colour were associated with the ASIP and MC1R genotype combination A/a E/E. CIE L*a*b colour spectrophotometry represents an effective tool to characterise and quantify coat colour in horses, especially in chestnut horses, for which the underlying genetic background of coat colour variation remains unknown.Key words: Posavje Horse; MC1R; ASIP; coat colour; spectrophotometry; CIE L*a*b KARAKTERIZACIJA BARVE DLAKE PRI POSAVSKEM KONJU Izvleček: Za opis barv konj se uporabljajo različni pristopi in klasifikacijski sistemi, ki se razlikujejo med posameznimi pasmami in državami. V raziskavi smo najprej opredelili različne barve dlake pri posavskem konju z metodo barvne spektrofotometrije po sistemu CIE L*a*b*. Fenotipsko razdelitev barv dlake po Sponenbergu (light bay/svetli rjavec, bay/rjavec, mahogany bay/kostanjev, brown/temni rjavec and seal brown/črnkast rjavec) smo potrdili s spektrofotometričnimi podatki. Vrednosti L*a*b so pri posavskem konju pokazale primerljivo visoko fenotipsko variabilnost rjave barve, pri tem so bili temnejši odtenki povezani z ASIP in MC1R kombinacijo genotipa A/a E/E. Barvna spektrofotometrija po sistemu CIE L*a*b predstavlja učinkovito orodje za kvalitativno in kvantitativno opredelitev/določanje barv pri konjih, zlasti pri lisjakih, pri katerih še vedno ni znana genska osnova variabilnosti v barvi dlake.Ključne besede: posavski konj; MC1R; ASIP; barva dlake; spektrofotometrija; CIE L*a*b

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Section: Discussionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterisation of Coat Colour in the Slovenian Posavje Horse

Grilz-Seger

Mesarič

Brem

et al. 2021

SVR

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“…However, there are remarkable differences in color phenotypes that are not explainable by Mendelian inheritance. Different authors [ 16 , 31 ] indicated that there are two different types of black coat color (which they termed non-fading and fading black coats), in which the genetic determination is unknown, but age, sex, season, feeding, housing system, and body part are environmental effects that could significantly affect their expression. One plausible reason for this could be that the estimations of heritability for overall coat color reveal the dominant effect of environmental factors on total variability [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

“…For data collection, the QB was defined using the same criteria as Smith [ 16 ], who described two different types of black coat: non-fading (jet black, which is charcoal black with a metallic shine) and fading (black coat color without shine, fading to a reddish-brown tinge). In PRMe horses, the appraisers used seven levels for black coat, according to their quality, which covered the whole range of both types of black coat defined by the authors cited above.…”

Section: Methodsmentioning

confidence: 99%

Morpho-Functional Traits in Pura Raza Menorquina Horses: Genetic Parameters and Relationship with Coat Color Variables

Perdomo-González

Paredes

Valera

et al. 2022

Animals

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The studbook of Pura Raza Menorquina horses only permits the use of black-coated animals with a small quantity of white marks as breeding stock. Its breeding program uses linear mor-pho-functional traits as selection criteria. Our aim was to estimate the genetic parameters of linear morpho-functional traits, and reveal relationship of quality of black coat color (QB) and percentage of white marks (WM) with the other morphological and functional linear traits in this breed. A total of 46 linear traits were scored by four appraisers using seven classes, with a total of 772 records from 333 animals (≥4 years old). Univariate animal models using a Bayesian approach were used, with a pedigree of 757 animals. Sex (two) and appraiser-season (13) were included as fixed effects, age as a linear covariate, and permanent environmental and additive genetic as random effect. The heritabilities of the morpho-functional traits were low to medium (0.09–0.58) and matched the range in the bibliography. Heritabilities for coat color traits were 0.36 for QB and 0.23 for WM. The highest genetic correlations were obtained between QB and upper neck line (0.816) and between WM and form of the hoof (0.638). The negative signs of most of the genetic correlations between WM and the functional traits is also remarkable, contributing to the selection of functional traits against the presence of white marks in this population. A clear genetic differentiation was observed between animals with better breeding values for QB and WM, corroborated by a study on founders. In conclusion, QB and WM could show different genetic backgrounds.

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Quantitative Aspects of Coat Color in Old Kladruber Black Horses

Cited by 2 publications

References 9 publications

Characterisation of Coat Colour in the Slovenian Posavje Horse

Characterisation of Coat Colour in the Slovenian Posavje Horse

Morpho-Functional Traits in Pura Raza Menorquina Horses: Genetic Parameters and Relationship with Coat Color Variables

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