TY  - JOUR
AU  - Vucković, Goran
AU  - Bobić, Tina
AU  - Mijić, Pero
AU  - Gavran, Mirna
AU  - Gregić, Maja
AU  - Potocnik, Klemen
AU  - Bogdanović, Vladan
AU  - Gantner, Vesna
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5271
AB  - In order to estimate the variance components as well as the breeding value for daily milk production of Holstein cows in terms of heat stress defined as different THI threshold values (68, 70, and 72) 1,275,713 test-day records from 90,159 cows were used. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Daily milk production was analysed as a bivariate variable, in the normal conditions (under the set THIthreshold value), and in terms of heat stress (above the set THIthreshold value) using a model that accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal. The estimated high genetic correlations between the daily milk production in normal and heat stress conditions, as well as high correlations among the EBVs in normal and heat stress conditions, point out that Holstein cows with high productivity in normal condition will sustain an alike level of production even in terms of heat stress. These results indicate that the Holstein cows are very well acclimatized to the environmental conditions at dairy farms in Croatia. However, these findings should be taken with caution, given that measurements of microclimate parameters were conducted only once at a milk recording day, so the reliability of such measurements could be questionable. In conclusion, in order to realize a completely unambiguous conclusion, further studies that include multiple daily measurements of microclimatic parameters in the farms facilities are necessary.
PB  - Croatian Dairy Union, Zagreb
T2  - Mljekarstvo
T1  - Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress
EP  - 209
IS  - 3
SP  - 201
VL  - 70
DO  - 10.15567/mljekarstvo.2020.0306
ER  - 

@article{
author = "Vucković, Goran and Bobić, Tina and Mijić, Pero and Gavran, Mirna and Gregić, Maja and Potocnik, Klemen and Bogdanović, Vladan and Gantner, Vesna",
year = "2020",
abstract = "In order to estimate the variance components as well as the breeding value for daily milk production of Holstein cows in terms of heat stress defined as different THI threshold values (68, 70, and 72) 1,275,713 test-day records from 90,159 cows were used. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Daily milk production was analysed as a bivariate variable, in the normal conditions (under the set THIthreshold value), and in terms of heat stress (above the set THIthreshold value) using a model that accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal. The estimated high genetic correlations between the daily milk production in normal and heat stress conditions, as well as high correlations among the EBVs in normal and heat stress conditions, point out that Holstein cows with high productivity in normal condition will sustain an alike level of production even in terms of heat stress. These results indicate that the Holstein cows are very well acclimatized to the environmental conditions at dairy farms in Croatia. However, these findings should be taken with caution, given that measurements of microclimate parameters were conducted only once at a milk recording day, so the reliability of such measurements could be questionable. In conclusion, in order to realize a completely unambiguous conclusion, further studies that include multiple daily measurements of microclimatic parameters in the farms facilities are necessary.",
publisher = "Croatian Dairy Union, Zagreb",
journal = "Mljekarstvo",
title = "Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress",
pages = "209-201",
number = "3",
volume = "70",
doi = "10.15567/mljekarstvo.2020.0306"
}

Vucković, G., Bobić, T., Mijić, P., Gavran, M., Gregić, M., Potocnik, K., Bogdanović, V.,& Gantner, V.. (2020). Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress. in Mljekarstvo
Croatian Dairy Union, Zagreb., 70(3), 201-209.
https://doi.org/10.15567/mljekarstvo.2020.0306

Vucković G, Bobić T, Mijić P, Gavran M, Gregić M, Potocnik K, Bogdanović V, Gantner V. Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress. in Mljekarstvo. 2020;70(3):201-209.
doi:10.15567/mljekarstvo.2020.0306 .

Vucković, Goran, Bobić, Tina, Mijić, Pero, Gavran, Mirna, Gregić, Maja, Potocnik, Klemen, Bogdanović, Vladan, Gantner, Vesna, "Genetic parameters and breeding values for daily milk production of Holstein cows in terms of heat stress" in Mljekarstvo, 70, no. 3 (2020):201-209,
https://doi.org/10.15567/mljekarstvo.2020.0306 . .

TY  - JOUR
AU  - Vucković, Goran
AU  - Bobić, Tina
AU  - Mijić, Pero
AU  - Gavran, Mirna
AU  - Gregić, Maja
AU  - Potocnik, Klemen
AU  - Bogdanović, Vladan
AU  - Gantner, Vesna
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5295
AB  - Variance components for daily milk production as well as breeding value of dairy Simmentals for daily milk production in terms of heat stress defined as different values of THI threshold values (72, 74, and 76) were estimated using 1,636,192 test-day records provided by the Croatian Agricultural Agency. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Bivariate estimation model accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal Obtained high genetic correlations between the daily milk production in normal and condition characterized by heat stress, as well as very high correlations between the EBVs in normal and heat stress conditions indicate animals' high level of acclimatization to the environment on dairy cattle farms. Since microclimate measurements were carried out only once at a milk recording day, these results should be taken with caution. Generally, further research with multiple daily measurements of the microclimate parameters in the facilities is necessary to provide a fully unambiguous conclusion.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress
EP  - 650
IS  - 2
SP  - 641
VL  - 52
DO  - 10.2298/GENSR2002641V
ER  - 

@article{
author = "Vucković, Goran and Bobić, Tina and Mijić, Pero and Gavran, Mirna and Gregić, Maja and Potocnik, Klemen and Bogdanović, Vladan and Gantner, Vesna",
year = "2020",
abstract = "Variance components for daily milk production as well as breeding value of dairy Simmentals for daily milk production in terms of heat stress defined as different values of THI threshold values (72, 74, and 76) were estimated using 1,636,192 test-day records provided by the Croatian Agricultural Agency. Temperature-humidity index (THI) calculated from ambient temperature and relative humidity recorded in the barns on the milk recording day was used as the measure of heat stress. Bivariate estimation model accounted variances due to lactation stage, calving season, age at calving, breeding region, parity, permanent environment, interaction between hear and year, and individual animal Obtained high genetic correlations between the daily milk production in normal and condition characterized by heat stress, as well as very high correlations between the EBVs in normal and heat stress conditions indicate animals' high level of acclimatization to the environment on dairy cattle farms. Since microclimate measurements were carried out only once at a milk recording day, these results should be taken with caution. Generally, further research with multiple daily measurements of the microclimate parameters in the facilities is necessary to provide a fully unambiguous conclusion.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress",
pages = "650-641",
number = "2",
volume = "52",
doi = "10.2298/GENSR2002641V"
}

Vucković, G., Bobić, T., Mijić, P., Gavran, M., Gregić, M., Potocnik, K., Bogdanović, V.,& Gantner, V.. (2020). Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress. in Genetika
Društvo genetičara Srbije, Beograd., 52(2), 641-650.
https://doi.org/10.2298/GENSR2002641V

Vucković G, Bobić T, Mijić P, Gavran M, Gregić M, Potocnik K, Bogdanović V, Gantner V. Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress. in Genetika. 2020;52(2):641-650.
doi:10.2298/GENSR2002641V .

Vucković, Goran, Bobić, Tina, Mijić, Pero, Gavran, Mirna, Gregić, Maja, Potocnik, Klemen, Bogdanović, Vladan, Gantner, Vesna, "Estimation of genetic parameters and breeding values for daily milk production of dairy simmentals in terms of heat stress" in Genetika, 52, no. 2 (2020):641-650,
https://doi.org/10.2298/GENSR2002641V . .

TY  - JOUR
AU  - Vučković, Goran
AU  - Bobić, Tina
AU  - Mijić, Pero
AU  - Gavran, Mirna
AU  - Potočnik, Klemen
AU  - Bogdanović, Vladan
AU  - Gantner, Vesna
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5195
AB  - Aiming determination of the variability of production traits (daily milk yield and composition) and microclimate parameters (ambient temperature and humidity) in the barns; as well as the correlation between the analyzed groups of traits, 1,636,192 test-day records from Simmentals and 1,275,713 test-day records from Holsteins were analysed. Performed analysis indicate high variability of production traits due to cow's breed, parity as well as breeding region. Also, high variability of microclimate parameters in the barns due to season and breeding region was found. Furthermore, statistically highly significant (p  lt  0.001) correlations between the production traits and microclimate parameters were determined. Finally, the negative effect of inadequate microclimate on daily milk production was determined in both breeds in all breeding regions. Since genetic evaluation and selection of dairy cattle for heat resistance is only long-term method for heat stress managing, determined effect will be taken into account in the statistical model for estimation of genetic parameters and breeding values.
AB  - Cilj istraživanja je bio određivanje varijabilnosti proizvodnih osobina (dnevni prinos i sastav mleka) i mikroklimatskih parametara (temperatura i vlažnost okoline) u objektima za držanje krava za proizvodnju mleka; kao i korelacija između analiziranih grupa osobina; 1.636.192 zapisa za grla simentalske rase i 1.275.713 zapisa test dana grla holštajn rase. Izvršene analize pokazuju veliku varijabilnost proizvodnih osobina zbog rase krava, pariteta kao i odgajivaĉkog regiona. Takođe je utvrđena velika varijabilnost mikroklimatskih parametara u objektima zbog sezone i odgajivačkog regiona. Pored toga, utvrđene su statistički vrlo značajne (p lt 0,001) korelacije između proizvodnih svojstava i parametara mikroklime. Konačno, negativan uticaj neadekvatne mikroklime na svakodnevnu proizvodnju mleka utvrđen je kod obe rase u svim odgajivačkim regionima. Pošto je genetska procena i selekcija mlečnih goveda na otpornost na visoke temperature sredine samo dugoročna metoda za upravljanje toplotnim stresom, utvrđeni efekat biće uzet u obzir u statističkom modelu za procenu genetskih parametara i odgajivačkih vrednosti.
PB  - Institut za stočarstvo, Beograd
T2  - Biotechnology in Animal Husbandry
T1  - Analysis of production traits and microclimate parameters on dairy cattle farms
T1  - Analiza proizvodnih karakteristika i mikroklimatskih parametara na farmama za proizvodnju mleka
EP  - 334
IS  - 4
SP  - 323
VL  - 35
DO  - 10.2298/BAH1904323V
ER  - 

@article{
author = "Vučković, Goran and Bobić, Tina and Mijić, Pero and Gavran, Mirna and Potočnik, Klemen and Bogdanović, Vladan and Gantner, Vesna",
year = "2019",
abstract = "Aiming determination of the variability of production traits (daily milk yield and composition) and microclimate parameters (ambient temperature and humidity) in the barns; as well as the correlation between the analyzed groups of traits, 1,636,192 test-day records from Simmentals and 1,275,713 test-day records from Holsteins were analysed. Performed analysis indicate high variability of production traits due to cow's breed, parity as well as breeding region. Also, high variability of microclimate parameters in the barns due to season and breeding region was found. Furthermore, statistically highly significant (p  lt  0.001) correlations between the production traits and microclimate parameters were determined. Finally, the negative effect of inadequate microclimate on daily milk production was determined in both breeds in all breeding regions. Since genetic evaluation and selection of dairy cattle for heat resistance is only long-term method for heat stress managing, determined effect will be taken into account in the statistical model for estimation of genetic parameters and breeding values., Cilj istraživanja je bio određivanje varijabilnosti proizvodnih osobina (dnevni prinos i sastav mleka) i mikroklimatskih parametara (temperatura i vlažnost okoline) u objektima za držanje krava za proizvodnju mleka; kao i korelacija između analiziranih grupa osobina; 1.636.192 zapisa za grla simentalske rase i 1.275.713 zapisa test dana grla holštajn rase. Izvršene analize pokazuju veliku varijabilnost proizvodnih osobina zbog rase krava, pariteta kao i odgajivaĉkog regiona. Takođe je utvrđena velika varijabilnost mikroklimatskih parametara u objektima zbog sezone i odgajivačkog regiona. Pored toga, utvrđene su statistički vrlo značajne (p lt 0,001) korelacije između proizvodnih svojstava i parametara mikroklime. Konačno, negativan uticaj neadekvatne mikroklime na svakodnevnu proizvodnju mleka utvrđen je kod obe rase u svim odgajivačkim regionima. Pošto je genetska procena i selekcija mlečnih goveda na otpornost na visoke temperature sredine samo dugoročna metoda za upravljanje toplotnim stresom, utvrđeni efekat biće uzet u obzir u statističkom modelu za procenu genetskih parametara i odgajivačkih vrednosti.",
publisher = "Institut za stočarstvo, Beograd",
journal = "Biotechnology in Animal Husbandry",
title = "Analysis of production traits and microclimate parameters on dairy cattle farms, Analiza proizvodnih karakteristika i mikroklimatskih parametara na farmama za proizvodnju mleka",
pages = "334-323",
number = "4",
volume = "35",
doi = "10.2298/BAH1904323V"
}

Vučković, G., Bobić, T., Mijić, P., Gavran, M., Potočnik, K., Bogdanović, V.,& Gantner, V.. (2019). Analysis of production traits and microclimate parameters on dairy cattle farms. in Biotechnology in Animal Husbandry
Institut za stočarstvo, Beograd., 35(4), 323-334.
https://doi.org/10.2298/BAH1904323V

Vučković G, Bobić T, Mijić P, Gavran M, Potočnik K, Bogdanović V, Gantner V. Analysis of production traits and microclimate parameters on dairy cattle farms. in Biotechnology in Animal Husbandry. 2019;35(4):323-334.
doi:10.2298/BAH1904323V .

Vučković, Goran, Bobić, Tina, Mijić, Pero, Gavran, Mirna, Potočnik, Klemen, Bogdanović, Vladan, Gantner, Vesna, "Analysis of production traits and microclimate parameters on dairy cattle farms" in Biotechnology in Animal Husbandry, 35, no. 4 (2019):323-334,
https://doi.org/10.2298/BAH1904323V . .