The effects of inbreeding on service period and pregnancy length in Holsteins and Czech Fleckviehs after the first calving

Bezdíček, Jiří; Šubrt, Ján; Filipčík, Radek; Bjelka, M.; Dufek, A.

doi:10.5194/aab-50-455-2007

Cited by 13 publications

(13 citation statements)

References 12 publications

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“…Two studies investigating inbreeding depression in Holstein and Czech Fleckvieh cattle also found no significant effects of inbreeding on GL (Bezdíček et al . ; Rokouei et al . ).…”

Section: Resultsmentioning

confidence: 99%

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Inbreeding depression in Zebu cattle traits

Pereira

Júnior

Ayres

et al. 2016

J Animal Breeding Genetics

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The productivity of herds may be negatively affected by inbreeding depression, and it is important to know how intense is this effect on the livestock performance. We performed a comprehensive analysis involving five Zebu breeds reared in Brazil to estimate inbreeding depression in productive and reproductive traits. Inbreeding depression was estimated for 13 traits by including the individual inbreeding rate as a linear covariate in the standard genetic evaluation models. For all breeds and for almost all traits (no effect was observed on gestation length), the performance of the animals was compromised by an increase in inbreeding. The average inbreeding depression was -0.222% and -0.859% per 1% of inbreeding for linear regression coefficients scaled on the percentage of mean (β ) and standard deviation (β ), respectively. The means for β (and β ) were -0.269% (-1.202%) for weight/growth traits and -0.174% (-0.546%) for reproductive traits. Hence, inbreeding depression is more pronounced in weight/growth traits than in reproductive traits. These findings highlight the need for the management of inbreeding in the respective breeding programmes of the breeds studied here.

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“…Two studies investigating inbreeding depression in Holstein and Czech Fleckvieh cattle also found no significant effects of inbreeding on GL (Bezdíček et al . ; Rokouei et al . ).…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, Bezdíček et al . (), who used phenotypic records of Holstein and Czech Fleckvieh cows, estimated an increase in DO of 0.22 day per 1% increase in F i .…”

Section: Resultsmentioning

confidence: 99%

Inbreeding depression in Zebu cattle traits

Pereira

Júnior

Ayres

et al. 2016

J Animal Breeding Genetics

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“…Inbreeding depression has been evaluated and confirmed in small cattle populations (12,13) as well as in breeds with large worldwide numerical distribution. The influence of inbreeding depression has been confirmed mainly on traditional traits, such as length of service period (14)(15)(16), number of services and conception rate (14), and length of the first calving interval (17). Alvarez et al (18) determined a lower number of transferable embryos in cows with F X = 9.0%-30.0% compared to those with F X = 0%-8.9% (P < 0.05).…”

Section: Introductionmentioning

confidence: 98%

Effect of inbreeding on yield and quality of embryos recovered from superovulated Holstein cows

Bezdíček

Stádník²,

Makarevich³

et al. 2014

Turk J Vet Anim Sci

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The aim of this study was to evaluate the effect of inbreeding on the yield and quality of bovine embryos. The data were obtained from 125 Holstein cows superovulated on 3 farms in the Czech Republic. In total, 125 flushings of embryos were analyzed, from which 761 embryos were obtained. Of all donors, 36 cows were inbred (199 embryos) and 89 cows were noninbred (562 embryos). The inbred cows were divided into 2 groups according to their inbreeding coefficient (F X ) level. The low F X group (F X 1.26%-1.56%) had 23 cows and 147 embryos, and the high F X group (F X 3.1%-25%) was represented by 13 cows and 52 embryos. The average value of the F X coefficient in inbred cows was 6.552%. The data were subsequently analyzed using PROC GLM of SAS as descriptive statistics and t-tests (SAS/STAT ® 9. 1., 2009). All evaluated traits in inbred cows had worse results than noninbred cows. Although there were poorer results for inbred versus noninbred cows, the differences were not great at lower F X values and were not statistically significant. Important and significant differences (P ≤ 0.05) were found in the proportion of transferable embryos and unfertilized oocytes at higher rates of F X .

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“…Milk yield and milk composition (milk indicators, MIs), reproduction performance (Bezdíček et al 2007, Parland et al 2007), health status (Hinrichs et al 2006) and other functional traits are important data for the genetic improvement of dairy cattle (Bergfeld & Klunker 2002, Distl 2001. The genetic impact of sire on cattle populations, herd milk yields and some MIs have been desribed in a number of papers (Thompson et al 2007a, 2007b, Biedermann et al 2003, Bezdíček et al 2008.…”

Section: Introductionmentioning

confidence: 99%

Effect of sires on wide scale of milk indicators in first calving Czech Fleckvieh cows

et al. 2011

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The possible genetic impact of sire on cattle populations, herd milk yield and milk traits (fat and protein) have been described in the literature along with its impact on some milk indicators (MIs) as somatic cell count, urea and ketones. There is a dearth of information on the impact on a series of other MIs (physical, chemical, health, technological). The goal of this study was to assess the possible effect of sire on a wide range of MIs including technological properties in Czech Fleckvieh to suggest future possible breeding trends. A series of MIs (n=37) was investigated in individual milk samples (MSs). 191 effective daughters (MSs) were included. The sire groups (n=13) were well balanced in terms of herd, lactation stage and sampling season. Only sires with >5 daughters were ranked. A linear model of analysis variance with the fixed effects, sire and combined factor (herd × year × season) was used. 19 MIs as log count of streptococci in fermentation ability of milk (log FAM-CS), FAM-CS, log total fine microflora count in FAM (log FAM-TCM), FAM-TCM, solids non fat (SNF), iodine content, citric acid (CA), titration acidity in FAM, lactose (L), crude protein (CP), true protein (TP), casein (CAS), dry matter, Mg and P content, milk alcohol stability, electrical conductivity (EC), titration acidity, casein numbers (for CP and TP), log count of lactobacilli in FAM (log FAM-CL), FAM-CL and pH in FAM were influenced by sire (P<0.05). However SNF, CA, L, CAS and perhaps EC could be newly reflected as information for genetic improvement of dairy cattle with connection to dairy milk recovery and cow health. CA (10.08±1.92 mmol×l −1 ) deserves special attention. The model variablity explanation moved from 6.97 (SCC) over 29.51 (CA) to 48.32 % (pH) for MIs. This is one of few studies to assess the impact of sire over a wide range of MIs and the results warrant careful evaluation and further study.

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The effects of inbreeding on service period and pregnancy length in Holsteins and Czech Fleckviehs after the first calving

Cited by 13 publications

References 12 publications

Inbreeding depression in Zebu cattle traits

Inbreeding depression in Zebu cattle traits

Effect of inbreeding on yield and quality of embryos recovered from superovulated Holstein cows

Effect of sires on wide scale of milk indicators in first calving Czech Fleckvieh cows

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