The Analysis of Reproduction in Population of the Slovak Spotted Dairy Cows

Abstract

The aim of study was to analyse the reproduction and factors affecting on reproduction traits of dairy cows in population of Slovak Spotted cattle from 2007 to 2016 the results for 37,274 dairy cows: days to first service (DFS), days open (DO), number of inseminations per conception (NIC), age of first calving (AFC) and calving interval (CI). The basic statistical analysis were analysed using the SAS version 9.3. For the actual computation a linear models with fixed effects was used: For the actual computation a linear models with fixed effects was used: yijklm = μ + HYSi + BTj+ Fk+ Bl +eijklm. The linear model represents coefficients determination R2 = 0.452117% (P < 0.001) for DFS, R2 = 0.377715% (P < 0.001) for DO, R2 = 0.348442% (P < 0.001) for NIC and R2 = 0.317128% (P < 0.001) for CI with all fixed effects. Correlation coefficients among DFS with DO, NIC, AFC and CI were r = 0.37275, r = -0.06881, r = 0.06493 and r = 0.08348. These coefficients were highly statistically significant (P < 0.001).

Changes in production and reproduction traits in population of the Slovak Spotted Cattle

“…When comparing the average values of reproductive traits in the whole population of dairy cows in Slovakia for the evaluated period, namely the AFC was 876 days (2010) and 840 days (2019), on the other hand, for the CI was 429 days (2010) and 409 days (2019), as shown by (B.S.SR, 2020). These results are in contrary to the recommendations of Pšenica et al (1987), Havrila et al (2003), Tomko (2018) and Bujko et al (2019).…”

“…Cows were divided according to the Herd Book classification to subsequent breed-type groups: S 0purebred Slovak Spotted with the proportion of foreign breeds less than 12.5%; S 1 -cows with the genetic proportion of Slovak Spotted from 75% to 87.4%; S 2cows with the genetic proportion of Slovak Spotted from 50% to 74.9% (Bujko et al, 2019; Slovak Simmental Breeders Association, 2020).…”

The evaluation of the relationship of lactose to production and reproduction traits in different breeding conditions of the Slovak Spotted dairy cows

“…The evaluation of production traits, reproduction traits and relation between each other in dairy cows shows authors in Slovakia (Bujko et al, 2019 andKasarda et al, 2020), Czech (Stadnik et al, 2018) Austria (Costa et al, 2019), Poland (Satoła et al, 2017), Romania (Cziszter et al, 2017;Han andBobiş, 2019), New Zealand (Sneddon et al, 2015) and other authors who have dealt with the similar areas of research.…”

112. Genetic and environmental influences on maternal calving difficulty in South African Holstein cattle

“…Along with calf and cow mortality, it results in economic losses due to increased labour and veterinary costs, and other management expenses (Kaya et al, 2015). Difficulties during parturition also affect long-term animal performance through health issues, fertility problems, reduced production, and involuntary culling (Abdela and Ahmed, 2016;Bujko et al, 2018). Dystocia is also a welfare problem, as it causes pain and injury to the cow, which directly leads to poor cow welfare (Abdela and Ahmed, 2016).…”