Selection in the genetic resource: genetic variation of the linear described type traits in the Old Kladrub horse

Jakubec, V.; Vostrý, L.; Schlote, W.; Majzlík, I.; Mach, Katharine J.

doi:10.5194/aab-52-343-2009

Cited by 12 publications

(22 citation statements)

References 11 publications

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“…In the N breed the increase in F x was similar in both sexes. Similar values of F x were estimated by Jakubec et al (2009) in Old Kladrub horses and by Wolc & Balińska (2010) in the Polish Konik population. Sierszchulski et al (2005) found average values of F x =0.88 % in the Polish Arab horse.…”

Section: Methodssupporting

confidence: 80%

Population structure of Czech cold-blooded breeds of horses

et al. 2011

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In order to estimate effective population size, generation interval and the development of inbreeding coefficients (F x ) in three original breeds of cold-blooded horses kept in the Czech Republic: Silesian Noriker (SN), Noriker (N) and Czech-Moravian Belgian horse (CMB) all animals of the particular breeds born from 1990 to 2007 were analysed. The average values of generation interval between parents and their offspring were: 8.53 in SN, 8.88 in N and 8.56 in CMB. Average values of effective population size were estimated to be: 86.3 in SN, 162.3 in N and 104.4 in CMB. The average values of inbreeding coefficient were 3.13 % in SN stallions and 3.39 % in SN mares, in the N breed 1.76 % and 1.26 % and in the CMB breed 3.84 % and 3.26 % respectively. Overall averages of F x were: 3.23 %, 1.51 % and 3.55 % for the breeds SN, N and CMB. The average value of inbreeding coefficient F x increased by 1.22 % in SN, by 0.35 % in N and by 1.01 % in CMB, respectively. This may lead to a reduction in genetic variability. Reduction in genetic variability could be either controlled in cooperation with corresponding populations of cold-blooded breeds in other European countries or controlled by number of sires used in population. Keywords

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Section: Methodssupporting

confidence: 80%

Population structure of Czech cold-blooded breeds of horses

et al. 2011

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“…The average inbreeding coefficient throughout all lines totalled 0.076, with SD of 0.038. This estimated average inbreeding coefficient corresponds to the estimated value of F IT in the molecular part of the analysis (Table 4, F IT = 0.073), as well as the value published by Jakubec et al (2009) in an analysis covering all individuals born in 1993 within the Old Kladruber population (F X = 0.0775).…”

Section: Determining Inter-line Genetic Relationship Using Pedigree Isupporting

confidence: 66%

“…Genetic variability in the Old Kladruber horse lines mentioned above is maintained by breeding schedules when parental pairs are set up from individuals with relationship as small as possible. Thanks to this, there was a reduction in the coefficient of inbreeding in the total population by 2.87%, from 7.75% in horses born in 1993 to the value of 4.88% in those born in 2003 (Jakubec et al, 2009).…”

Section: Determining the Inter-line Relationship Using Microsatellitementioning

confidence: 94%

Intra-line and inter-line genetic diversity in sire lines of the Old Kladruber horse based on microsatellite analysis of DNA

Vostrý¹,

Kracíková²,

Hofmanová³

et al. 2011

CZECH J ANIM SCI

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ABSTRACT:The Old Kladruber horse is the oldest original Czech horse breed -gene resource, with pedigree records spanning three centuries. Because the population is closed, there is a concern about the loss of genetic variation. The genetic diversity within and amongst sire lines was evaluated using microsatellite markers and based on pedigree information. The DNA analysis, covering 16 microsatellite loci, revealed that the genetic diversity (observed heterozygosity = 0.637, genetic diversity = 0.678 and the mean number of alleles = 8.25) for the Old Kladruber horse is consistent with other populations of horses. Inter-line genetic difference in sire lines reached the mean value (the F ST values ranged from 0.020 to 0.017). Differences amongst the sire lines were identified using genetic distances and principal component analysis. One gene cluster comprised black variation sire lines, while the second cluster included the sire lines of the grey variation. In the subjects monitored, the average inbreeding coefficient of 0.076 was estimated on the basis of pedigree information. The highest mean values of the coefficient of relationship were estimated within the colour variations. When comparing the genetic distance and the average coefficient of relationship, differences were found out. These results are useful for the development of breeding strategies which consider classical horse breeding as well as recent achievements of population and conservation genetics.

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“…The breed is nowadays included in the genetic resources of the Czech Republic and the population has been fully closed since 2002. As the population is small (effective population size N e = 201), its genetic diversity is continuously monitored (Horin et al 1998;Jakubec et al 2009;Vostry et al 2011;Janova et al 2013). The population is bred in two coat colours -grey (6 sire lines) and black (4 sire lines).…”

Section: Introductionmentioning

confidence: 99%

Characterization of greying, melanoma, and vitiligo quantitative inheritance in Old Kladruber horses

Hofmanová¹,

Vostrý²,

Majzlík³

et al. 2015

Czech J. Anim. Sci.

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ABSTRACT:The paper deals with the greying process, melanoma, and vitiligo depigmentation occurrence in Old Kladruber horses (OKH). The study includes 376 animals of both sexes at the age of 1-25 years. The evaluation was performed repeatedly during 4 consecutive years. The greying status was measured spectrophotometrically on four body parts using L*a*b* colour system. Melanoma and vitiligo were detected visually and by palpation in all the animals and classified using 5 (3) grade scale. The GLM procedure of SAS package was used to examine the influence of the effects of line, age, sex, stud, and year of evaluation. The GLM analysis confirmed a significant impact of age on greying. Parameter L* showed progressive increase until 10 years of age when all horses reached final grey level. Subsequent analyses suggested the influence of sex, i.e. a notably higher level of greying in mares. The incidence of melanoma was confirmed. Melanoma in OKH most frequently occurs on the bottom of the tail or at the anal and perineal area. Probably only benign forms of melanoma have been detected. The global occurrence of melanoma in OKH (ca. 13%) is substantially lower than in Lipizzan and Camargue horses. Overall incidence of melanoma in horses at the age of 15 and older reached 68%. Genetic parameters were estimated for melanoma grade, grey level, and vitiligo. Greying is strictly influenced by age (h 2 = 0.52 ± 0.07). Prevalence of melanoma progresses with age (h 2 = 0.07 ± 0.04). Vitiligos of both facial and anal parts are influenced by the effects studied (h 2 = 0.20 ± 0.05 and 0.34 ± 0.06 for vitiligo A and vitiligo F, respectively).

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Selection in the genetic resource: genetic variation of the linear described type traits in the Old Kladrub horse

Cited by 12 publications

References 11 publications

Population structure of Czech cold-blooded breeds of horses

Population structure of Czech cold-blooded breeds of horses

Intra-line and inter-line genetic diversity in sire lines of the Old Kladruber horse based on microsatellite analysis of DNA

Characterization of greying, melanoma, and vitiligo quantitative inheritance in Old Kladruber horses

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