Reproduction management in the german thorougbred breeding industry

Merkt, H; Klug, E; Jöchle, W.

doi:10.1016/s0737-0806(00)80087-8

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…The coldblooded horses Breton, Comtois, Ardenne, Percheron and Boulonnais in France had lower seasonal foaling rates than French warmblood or Thoroughbred mares [ 7 ], and the coldblooded Finnhorses achieved lower seasonal foaling rates than the Finnish Standardbred [ 9 ]. Studies of Thoroughbreds indicated foaling rates of 43–57% per cycle [ 12 , 13 ] and 52–78% per season [ 11 – 13 , 16 , 18 , 19 , 24 , 26 – 28 ]. In Standardbreds, foaling rates were 29–58% per cycle [ 5 ] and 50–76% per season [ 5 , 9 , 22 ].…”

Section: Discussionmentioning

confidence: 99%

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Effects of inbreeding and other systematic effects on fertility of Black Forest Draught horses in Germany

2017

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BackgroundThe Black Forest Draught horse (BFDH) is an endangered German coldblood breed with its origin in the area of the Black Forest in South Germany. In this retrospective study, the influence of the inbreeding coefficient on foaling rates was investigated using records from ten breeding seasons. Due to the small population size of BFDH, the level of inbreeding is increasing and may have an effect on foaling rates.The data of the present study included all coverings reported for 1024 BFDH mares in the years 2001–2009. These mares were covered by 32 BFDH stallions from the State Stud Marbach. Data from 4534 estrus cycles was used to calculate per cycle foaling rate (CFR). Pedigree data contained all studbook data up to the foundation of the breed as early as 1836. The level of inbreeding of the mare, stallion and expected foal along with other systematic effects on CFR were analysed using a generalized linear mixed model approach. Stallion was employed as a random effect. Systematic fixed effects were month of mating, mating type, age of the mare and stallion, reproductive status of the mare and stallion line of the mare. Inbreeding coefficients of the stallion, mare and expected foal were modelled as linear covariates.ResultsThe average CFR was 40.9%. The mean inbreeding coefficients of the mares, stallions and expected foals were 7.46, 7.70 and 9.66%. Mating type, age of the mare, reproductive status of the mare and stallion line of the mare had a significant effect.ConclusionsThe results showed that the mating type, stallion line of the mare, sire, age and reproductive status of the mare exerted the largest influences on CFR in BFDH. Inbreeding coefficients of the stallion, mare and expected foal were not significantly related with CFR.Electronic supplementary materialThe online version of this article (doi:10.1186/s13028-017-0338-4) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

“…Mares foaling later in the season have less usable cycles to get pregnant again [ 7 ]. In addition, the accumulation of subfertile mares that were covered repeatedly without success has a negative effect on fertility at the end of the breeding season as well [ 16 , 17 , 26 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of inbreeding and other systematic effects on fertility of Black Forest Draught horses in Germany

2017

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“…A number of factors thought to contribute to reproductive performance have been reported [5][6][7][8] . Only a few of these factors have been assessed through controlled studies.…”

Section: Factors Contributing To Reproductive Performancementioning

confidence: 99%

A survey of reproductive success in South African Thoroughbred horse breeding from 1975 to 1999

Schulman¹,

Marlow²,

Nurton³

2003

J. S. Afr. Vet. Assoc.

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The data and an analysis of the statistical summaries from the 'Return of Mares' of the General Stud Book of The Jockey Club of Southern Africa from 1975-1999 are presented. The total number of mares covered per season ranged from 7393 (1992) to 5180 (1995). The total living produce in the period surveyed was 95 317 foals. The categories of data examined include : the total number of mares covered per season; the total numbers and percentage of their living produce; the total numbers and percentage dead produce, 'slips' and foals born dead, barren and 'no return' mares; and the total number of live twins reported. The percentage live foals per season increased from 52 to 62 % and the percentage barren and 'no return' mares declined from 35.50 to 28.40 % over the period surveyed. The number of live twins reported showed a dramatic reduction from 156 to 5. These apparent improvements are ascribed to a combination of factors including advances in veterinary knowledge and technology. The findings are similar to those reported by similar surveys of national Thoroughbred populations from North America and Germany. There is an indication to broaden this annual survey by recording additional parameters more accurately reflecting reproductive efficiency rather than a cumulative annual total of live foals

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“…2003), although embryonic loss rates in older mares are higher (Squires et al. 2003) and fertility decreases with the mare’s age (Merkt et al. 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Some singular biological characteristics, as well as technical problems, have limited its widespread use in equine species, when compared to bovine species (Squires et al 1999). The major candidates for the ET programme are older mares with poor reproductive history that cannot produce a foal by natural breeding or artificial insemination, and mares that are in competition (Lopes 2002a;Squires et al 2003), although embryonic loss rates in older mares are higher (Squires et al 2003) and fertility decreases with the mare's age (Merkt et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Reproductive Parameters of Mangalarga Marchador Mares in a Commercial Embryo Transfer Programme

Lopes¹,

Siqueira

Pinho

et al. 2011

Reprod Domestic Animals

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The objective of this study is to evaluate the reproductive efficiency in donors and recipient Mangalarga Marchador mares in commercial programmes of embryo transfer (ET) and the effects of some reproductive characteristics and ET methodology on conception rates in the recipient mares. A total of 1140 flushing procedures were performed and 830 embryos (72.8%) were recovered. There were no differences between the rates of embryonic recovery in the different breeding seasons (p > 0.05) and 92.8% of the recovered embryos were 8-9 days old. There was no difference in the embryonic recovery regarding the collection order from the first to the ninth embryo collection along the breeding season, as well as among mares inseminated during the foal heat or subsequent cycles (p > 0.05). Pregnancy rates observed in the total period of all reproductive seasons at 15, 30, 45 and 60 days of pregnancy were 73.4, 69.9, 66.7 and 64.5%, respectively. Differences in pregnancy rate and early embryonic loss rates were not observed between embryos transferred immediately after collection (66.8% and 13.5%) and embryos transported at room temperature for periods of < 1 h (62.9% and 14.4%; p > 0.05). Pregnancy rates were higher when the interval between ovulations of donor and recipient mares remained between -3 and -2 days (p < 0.05), and the lowest rates were observed for intervals of -6 days (p < 0.05) with intermediary values for intervals of -1, 0 and +1 (p > 0.05). Embryonic loss rates, however, did not differ between intervals of ovulation's synchronism between donor and recipient mares (p > 0.05). This flexibilization in the ovulatory synchronism between donor and recipient mares optimizes the use of recipient mares, thus reducing costs and facilitating management of horse breeding farms.

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Reproduction management in the german thorougbred breeding industry

Cited by 5 publications

References 3 publications

Effects of inbreeding and other systematic effects on fertility of Black Forest Draught horses in Germany

Effects of inbreeding and other systematic effects on fertility of Black Forest Draught horses in Germany

A survey of reproductive success in South African Thoroughbred horse breeding from 1975 to 1999

Reproductive Parameters of Mangalarga Marchador Mares in a Commercial Embryo Transfer Programme

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