Genetic Parameters for Clinical Mastitis, Fertility and Somatic Cell Score in Czech Holstein Cattle

Zavadilová, Ludmila; Štípková, M.; Svitáková, Alena; Krupová, Zuzana; Kašná, Eva

doi:10.1515/aoas-2017-0006

Cited by 7 publications

(11 citation statements)

References 10 publications

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“…Mastitis is one of the main diseases affecting dairy herds, causing major losses in the milk production chain [ 1 ]. It is responsible for most involuntary disposal cases due to inflammation of the mammary gland and losses in animal productivity caused by the disease [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Genotype by environment interaction for somatic cell score in Holstein cattle of southern Brazil via reaction norms

Mulim

Pinto

Valloto³

et al. 2021

Anim Biosci

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Objective: The objective of this study was to evaluate the genetic behavior of a population of Holstein cattle in response to the variation of environmental temperature by analyzing the effects of genotype by environment interaction (GEI) through reaction norms for the somatic cell score (SCS).Methods: Data was collected for 67,206 primiparous cows from the database of the Paraná Holstein Breeders Association in Brazil, with the aim of evaluating the temperature effect, considered as an environmental variable, distinguished under six gradients, with the variation range found being 17°C to 19.5°C, over the region. A reaction norm model was adopted utilizing the fourth order under the Legendre polynomials, using the mixed models of analysis by the restricted maximum likelihood method by the WOMBAT software. Additionally, the genetic behavior of the 15 most representative bulls was assessed, in response to the changes in the temperature gradient.Results: A mean score of 2.66 and a heritability variation from 0.17 to 0.23 was found in the regional temperature increase. The correlation between the environmental gradients proved to be higher than 0.80. Distinctive genetic behaviors were observed according to the increase in regional temperature, with an observed increase of up to 0.258 in the breeding values of some animals, as well as a reduction in the breeding of up to 0.793, with occasional reclassifications being observed as the temperature increased.Conclusion: Non-relevant GEI for SCS were observed in Holstein cattle herds of southern Brazil. Thus, the inclusion of the temperature effect in the model of genetic evaluation of SCS for the southern Brazilian Holstein breed is not required.

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Section: Introductionmentioning

confidence: 99%

Genotype by environment interaction for somatic cell score in Holstein cattle of southern Brazil via reaction norms

Mulim

Pinto

Valloto³

et al. 2021

Anim Biosci

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“…The average, SD for cases number of clinical mastitis per lactation (time/parity) were 0.46±0.91 (Perez-Cabal et al 2009), 1.99±1.62 (Zavadilová et al 2015) and 0.38±0.4861 (Zavadilová et al 2017).…”

Section: Genetic Parameters and Estimated Breeding Valuementioning

confidence: 93%

Estimating Breeding values for milk production and mastitis traits for Holstein cattle in Egypt

Faid-Allah¹

2019

JITV

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<p class="abstrak2">This study was carried out to evaluate the sires and dams genetically for milk production and mastitis traits in Egyptian 12 herds of Holstein cattle using Best Linear Unbiased Prediction via MTDFREML program. The data was obtained from a commercial farm called Dena, located in Cairo-Alex Desert Road (80 Km), Menofia, Egypt. Data included 4791 cows, 4227 dams and 248 sires that represented the period from 2007 to 2014. Estimating breeding values for milk production traits as cumulative milk yield at 90 days (90-DM), cumulative milk yield at 180 days (180-DM), cumulative milk yield at 270 days (270-DM), cumulative milk yield at 305 days (305-DM), and number of mastitis infection around the season of lactation (MAST). The averages of the 90-DM, 180-DM, 270-DM, 305-DM and MAST were 3026.3±655.1 kg, 5873.3±1081.1 kg, 7891.1±2692.2 kg, 9611.2±1897.9 kg, and 0.712±1.2 time/parity, respectively. Estimates of heritability for the previous traits were 0.11±0.016, 0.15±0.014, 0.18±0.012, 0.22±0.015, and 0.09±0.029, respectively; genetic variance were 47206.2 kg, 175300.6 kg, 1304654.4 kg, 792411.6 kg and 0.12 time/parity, respectively; and phenotypic variance were 429147.6 kg, 1168670.6 kg, 7248079.9 kg, 3601870.9 kg, and 1.35 time/parity, respectively. The EBV values as average, SD, (Min: Max) for sires were 0.0±0.179 (-0.4: 0.66) for MAST, 0.0±86.176 (-263.1: 245.4) for 90-DM, 0.0±227.523 (-600.3: 800.3) for 180-DM, 0.0±413.48 (-323.3: 1277.7) for 270-DM and 0.0±440.26 (-1280.9: 1565.1) for 305-DM. Also, The EBVs for dams were 0.0±0.055 (-0.14: 0.45) for MAST, 0.033±26.24 (-142.8: 103.0) for 90-DM, 0.074±76.81 (-360.2: 289.6) for 180-DM, -0.045±139.66 (-591.9: 529.2) for 270-DM and 0.266±154.1 (-666.3: 617.6) for 305-DM. These results provide that the selection of sires and dams will improve the traits of milk production and mastitis in this herd because of the wide differences in genetic potential among sires and dams.</p>

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“…Heritability estimates for CM in Czech Holstein cattle were 0.11 (Wolf et al, 2010), 0.07 (Zavadilová et al, 2015), and 0.09 to 0.10 (Zavadilová et al, 2017). Kašná et al (2018) provided further estimates of genetic parameters and breeding values based on the available data and obtained heritability from 0.08 to 0.11 for CM.…”

Section: Introductionmentioning

confidence: 91%

Breeding values prediction for clinical mastitis in Czech Holstein cattle

Zavadilová

Kašná

Krupová

et al. 2020

Acta fytotechn zootechn

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Genetic Parameters for Clinical Mastitis, Fertility and Somatic Cell Score in Czech Holstein Cattle

Cited by 7 publications

References 10 publications

Genotype by environment interaction for somatic cell score in Holstein cattle of southern Brazil via reaction norms

Genotype by environment interaction for somatic cell score in Holstein cattle of southern Brazil via reaction norms

Estimating Breeding values for milk production and mastitis traits for Holstein cattle in Egypt

Breeding values prediction for clinical mastitis in Czech Holstein cattle

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