TY  - JOUR
AU  - Djedović, Radica
AU  - Vukasinovic, Natascha
AU  - Stanojević, Dragan
AU  - Bogdanović, Vladan
AU  - Ismael, Hasan
AU  - Janković, Dobrila
AU  - Gligović, Nikolija
AU  - Brka, Muhamed
AU  - Štrbac, Ljuba
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6281
AB  - In this study, the authors focused on the evaluation of the genetic parameters of longevity, milk yield traits, and type traits in dairy cattle populations in the Republic of Serbia. The total dataset used consisted of production records and pedigree data for 32,512 Holstein cows that calved from 1981 to 2015. The animal model was applied to determine the variance and covariance components and genetic parameters of the analyzed traits by applying the restricted maximum likelihood (REML) approach and using the programs VCE6 and PEST. The heritability of longevity traits was estimated using the Survival Kit V6.0 software package. Variance and covariance were estimated for five production traits: milk yield (MY), fat yield (FY), protein yield (PY), milk fat content (MC), and protein content (PC), and three longevity traits: length of productive life (LPL), lifetime milk yield (LMY), and the number of lactations achieved (NL) as well as for 18 standard type traits. Heritabilities for the milk, fat, and protein yield traits were 0.20 (MY), 0.15 (FY), and 0.19 (PY), respectively. The estimated coefficients of heritability for the longevity traits were higher when using the Weibull proportional hazards model compared to the traditional linear methods and ranged from 0.08 for NL to 0.10 for LPL. Heritability values for the type traits varied from a low of 0.10 (RLSsv—rear legs set–side view) to medium values of 0.32 (ST-stature). Genetic correlations were found between MY and the following longevity traits: LPL, LMY, and NL with values of −0.18, −0.11, and −0.09, respectively. Genetic correlations were found between MY and a number of linear type traits and varied from 0.02 (between MY and RUH-rear udder height) to 0.28 (between MY and FUA-fore udder attachment). Genetic correlations between the 18 investigated type traits ranged from −0.33 between TL (top line) and RTP (rear teats position) to 0.71 between AN (angularity) and RUH (rear udder height). Genetic correlations between most linear type traits and longevity traits (LPL, LMY, and NL) were generally negative and very low. The highest positive genetic correlation was found between UD and LPL (rxy = 0.38). © 2023 by the authors.
T2  - Animals
T2  - Animals
T1  - Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein
IS  - 3
VL  - 13
DO  - 10.3390/ani13030534
ER  - 

@article{
author = "Djedović, Radica and Vukasinovic, Natascha and Stanojević, Dragan and Bogdanović, Vladan and Ismael, Hasan and Janković, Dobrila and Gligović, Nikolija and Brka, Muhamed and Štrbac, Ljuba",
year = "2023",
abstract = "In this study, the authors focused on the evaluation of the genetic parameters of longevity, milk yield traits, and type traits in dairy cattle populations in the Republic of Serbia. The total dataset used consisted of production records and pedigree data for 32,512 Holstein cows that calved from 1981 to 2015. The animal model was applied to determine the variance and covariance components and genetic parameters of the analyzed traits by applying the restricted maximum likelihood (REML) approach and using the programs VCE6 and PEST. The heritability of longevity traits was estimated using the Survival Kit V6.0 software package. Variance and covariance were estimated for five production traits: milk yield (MY), fat yield (FY), protein yield (PY), milk fat content (MC), and protein content (PC), and three longevity traits: length of productive life (LPL), lifetime milk yield (LMY), and the number of lactations achieved (NL) as well as for 18 standard type traits. Heritabilities for the milk, fat, and protein yield traits were 0.20 (MY), 0.15 (FY), and 0.19 (PY), respectively. The estimated coefficients of heritability for the longevity traits were higher when using the Weibull proportional hazards model compared to the traditional linear methods and ranged from 0.08 for NL to 0.10 for LPL. Heritability values for the type traits varied from a low of 0.10 (RLSsv—rear legs set–side view) to medium values of 0.32 (ST-stature). Genetic correlations were found between MY and the following longevity traits: LPL, LMY, and NL with values of −0.18, −0.11, and −0.09, respectively. Genetic correlations were found between MY and a number of linear type traits and varied from 0.02 (between MY and RUH-rear udder height) to 0.28 (between MY and FUA-fore udder attachment). Genetic correlations between the 18 investigated type traits ranged from −0.33 between TL (top line) and RTP (rear teats position) to 0.71 between AN (angularity) and RUH (rear udder height). Genetic correlations between most linear type traits and longevity traits (LPL, LMY, and NL) were generally negative and very low. The highest positive genetic correlation was found between UD and LPL (rxy = 0.38). © 2023 by the authors.",
journal = "Animals, Animals",
title = "Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein",
number = "3",
volume = "13",
doi = "10.3390/ani13030534"
}

Djedović, R., Vukasinovic, N., Stanojević, D., Bogdanović, V., Ismael, H., Janković, D., Gligović, N., Brka, M.,& Štrbac, L.. (2023). Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein. in Animals, 13(3).
https://doi.org/10.3390/ani13030534

Djedović R, Vukasinovic N, Stanojević D, Bogdanović V, Ismael H, Janković D, Gligović N, Brka M, Štrbac L. Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein. in Animals. 2023;13(3).
doi:10.3390/ani13030534 .

Djedović, Radica, Vukasinovic, Natascha, Stanojević, Dragan, Bogdanović, Vladan, Ismael, Hasan, Janković, Dobrila, Gligović, Nikolija, Brka, Muhamed, Štrbac, Ljuba, "Genetic Parameters for Functional Longevity, Type Traits, and Production in the Serbian Holstein" in Animals, 13, no. 3 (2023),
https://doi.org/10.3390/ani13030534 . .

TY  - JOUR
AU  - Djedović, Radica
AU  - Bogdanović, Vladan
AU  - Perišić, Predrag
AU  - Stanojević, Dragan
AU  - Popović, Jelena
AU  - Brka, Muhamed
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3776
AB  - The quality and yield of milk, and therefore of dairy products as well, depends directly on their protein composition. Milk gene proteins represent structural locuses that are functionally associated with milk production. In cattle selection a special importance is attached to the variability of kappa casein (kappa-CN) as one of the four casein milk proteins. Genotypes of 21 Simmental breed cows, 20 crossbred cows obtained by crossing of Simmental and Red Holstein breed, and 25 cows of autochthonous Busha breed were determined for kappa casein by restriction fragment length polymorphism analysis (PCR-RFLP) of amplified DNA. The kappa-CN genotype frequencies for Simmental breed were: 42.8; 47.6 and 9.6 % for AA, AB and BB genotype, for crossbreds: 75.0; 25.0 and 0.0% and for Busha individuals: 41.7; 50.0 and 8.3 %, respectively. Frequencies of A and B alleles, assessed on the basis of genotypic frequencies were 0.667 and 0.333 for Simmental breed, 0.875 and 0.125 for crossbreds and 0.667 and 0.333 for autochthonous Busha cattle breed, respectively. For confirming the phenotypic variability of milk yield in standard lactation, yield of milk fat and the content of milk fat per kappa-CN genotypes within breeds observed the fixed model which included the breed effect, lactation in order and effect of kappa-CN genotype (AA, AB and BB) was used. The kappa-CN genotype statistically significantly (p  lt = 0.05) influenced milk yield and highly significantly (p  lt = 0.01) milk fat yield, while the content of milk fat was not statistically significantly (p >0.05) influenced in examined animals.
PB  - Društvo genetičara Srbije, Beograd
T2  - Genetika
T1  - Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia
EP  - 32
IS  - 1
SP  - 23
VL  - 47
DO  - 10.2298/GENSR1501023D
ER  - 

@article{
author = "Djedović, Radica and Bogdanović, Vladan and Perišić, Predrag and Stanojević, Dragan and Popović, Jelena and Brka, Muhamed",
year = "2015",
abstract = "The quality and yield of milk, and therefore of dairy products as well, depends directly on their protein composition. Milk gene proteins represent structural locuses that are functionally associated with milk production. In cattle selection a special importance is attached to the variability of kappa casein (kappa-CN) as one of the four casein milk proteins. Genotypes of 21 Simmental breed cows, 20 crossbred cows obtained by crossing of Simmental and Red Holstein breed, and 25 cows of autochthonous Busha breed were determined for kappa casein by restriction fragment length polymorphism analysis (PCR-RFLP) of amplified DNA. The kappa-CN genotype frequencies for Simmental breed were: 42.8; 47.6 and 9.6 % for AA, AB and BB genotype, for crossbreds: 75.0; 25.0 and 0.0% and for Busha individuals: 41.7; 50.0 and 8.3 %, respectively. Frequencies of A and B alleles, assessed on the basis of genotypic frequencies were 0.667 and 0.333 for Simmental breed, 0.875 and 0.125 for crossbreds and 0.667 and 0.333 for autochthonous Busha cattle breed, respectively. For confirming the phenotypic variability of milk yield in standard lactation, yield of milk fat and the content of milk fat per kappa-CN genotypes within breeds observed the fixed model which included the breed effect, lactation in order and effect of kappa-CN genotype (AA, AB and BB) was used. The kappa-CN genotype statistically significantly (p  lt = 0.05) influenced milk yield and highly significantly (p  lt = 0.01) milk fat yield, while the content of milk fat was not statistically significantly (p >0.05) influenced in examined animals.",
publisher = "Društvo genetičara Srbije, Beograd",
journal = "Genetika",
title = "Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia",
pages = "32-23",
number = "1",
volume = "47",
doi = "10.2298/GENSR1501023D"
}

Djedović, R., Bogdanović, V., Perišić, P., Stanojević, D., Popović, J.,& Brka, M.. (2015). Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia. in Genetika
Društvo genetičara Srbije, Beograd., 47(1), 23-32.
https://doi.org/10.2298/GENSR1501023D

Djedović R, Bogdanović V, Perišić P, Stanojević D, Popović J, Brka M. Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia. in Genetika. 2015;47(1):23-32.
doi:10.2298/GENSR1501023D .

Djedović, Radica, Bogdanović, Vladan, Perišić, Predrag, Stanojević, Dragan, Popović, Jelena, Brka, Muhamed, "Relationship between genetic polymorphism of k- casein and quantitative milk yield traits in cattle breeds and crossbreds in Serbia" in Genetika, 47, no. 1 (2015):23-32,
https://doi.org/10.2298/GENSR1501023D . .

TY  - JOUR
AU  - Brka, Muhamed
AU  - Hodzić, Aida
AU  - Reinsch, Norbert
AU  - Zecević, Ervin
AU  - Dokso, Admir
AU  - Djedović, Radica
AU  - Rukavina, Dunja
AU  - Kapur, Lejla
AU  - Vegara, Mensur
AU  - Sabanović, Mustafa
AU  - Ravić, Ivica
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2320
AB  - Busa is an old endangered autochthonous breed of the western Balkan, especially Bosnia-Herzegovina, Kosovo and Albania. A related breed is Gatacko, derived from Busa x Tirolean Grey crossbreds. Fifteen purebred Busa cattle and thirteen Gatacko animals were genotyped for polymorphisms at the kappa-casein gene by a Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) essay. The alleles A, B and C were found and the allelic frequencies were 0.46 (A), 0.46 (B) and 0.08 (C) in Busa cattle and 0.58 (A) and 0.42 (B) in Gatacko. Only AA, AB, BB and BC genotypes occurred. Further alleles were not detected and are therefore either absent in both populations or rare. The allele "B" found in this small population will be useful for a sire selection program in the future.
PB  - Archiv Fur Tierzucht, Dummerstorf
T2  - Archiv fur Tierzucht-Archives of Animal Breeding
T1  - Polymorphism of the kappa-casein gene in two Bosnian autochthonous cattle breeds
EP  - 282
IS  - 3
SP  - 277
VL  - 53
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2320
ER  - 

@article{
author = "Brka, Muhamed and Hodzić, Aida and Reinsch, Norbert and Zecević, Ervin and Dokso, Admir and Djedović, Radica and Rukavina, Dunja and Kapur, Lejla and Vegara, Mensur and Sabanović, Mustafa and Ravić, Ivica",
year = "2010",
abstract = "Busa is an old endangered autochthonous breed of the western Balkan, especially Bosnia-Herzegovina, Kosovo and Albania. A related breed is Gatacko, derived from Busa x Tirolean Grey crossbreds. Fifteen purebred Busa cattle and thirteen Gatacko animals were genotyped for polymorphisms at the kappa-casein gene by a Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) essay. The alleles A, B and C were found and the allelic frequencies were 0.46 (A), 0.46 (B) and 0.08 (C) in Busa cattle and 0.58 (A) and 0.42 (B) in Gatacko. Only AA, AB, BB and BC genotypes occurred. Further alleles were not detected and are therefore either absent in both populations or rare. The allele "B" found in this small population will be useful for a sire selection program in the future.",
publisher = "Archiv Fur Tierzucht, Dummerstorf",
journal = "Archiv fur Tierzucht-Archives of Animal Breeding",
title = "Polymorphism of the kappa-casein gene in two Bosnian autochthonous cattle breeds",
pages = "282-277",
number = "3",
volume = "53",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2320"
}

Brka, M., Hodzić, A., Reinsch, N., Zecević, E., Dokso, A., Djedović, R., Rukavina, D., Kapur, L., Vegara, M., Sabanović, M.,& Ravić, I.. (2010). Polymorphism of the kappa-casein gene in two Bosnian autochthonous cattle breeds. in Archiv fur Tierzucht-Archives of Animal Breeding
Archiv Fur Tierzucht, Dummerstorf., 53(3), 277-282.
https://hdl.handle.net/21.15107/rcub_agrospace_2320

Brka M, Hodzić A, Reinsch N, Zecević E, Dokso A, Djedović R, Rukavina D, Kapur L, Vegara M, Sabanović M, Ravić I. Polymorphism of the kappa-casein gene in two Bosnian autochthonous cattle breeds. in Archiv fur Tierzucht-Archives of Animal Breeding. 2010;53(3):277-282.
https://hdl.handle.net/21.15107/rcub_agrospace_2320 .

Brka, Muhamed, Hodzić, Aida, Reinsch, Norbert, Zecević, Ervin, Dokso, Admir, Djedović, Radica, Rukavina, Dunja, Kapur, Lejla, Vegara, Mensur, Sabanović, Mustafa, Ravić, Ivica, "Polymorphism of the kappa-casein gene in two Bosnian autochthonous cattle breeds" in Archiv fur Tierzucht-Archives of Animal Breeding, 53, no. 3 (2010):277-282,
https://hdl.handle.net/21.15107/rcub_agrospace_2320 .