Evaluation of breeding values of bulls for somatic cell count in milk
The incidence of subclinical and clinical mastitis in the mammary gland produces variety of defensive factors were nuclear leukocytes, lymphocytes and macrophages play an important role and they are marked as somatic cells. Somatic cell count depends on the type of pathogen and stage of infection. I...
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Published in | Biotechnology in Animal Husbandry (Serbia) Vol. 27; no. 3; pp. 1059 - 1066 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
2011
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Abstract | The incidence of subclinical and clinical mastitis in the mammary gland produces variety of defensive factors were nuclear leukocytes, lymphocytes and macrophages play an important role and they are marked as somatic cells. Somatic cell count depends on the type of pathogen and stage of infection. Increased number of somatic cells in milk occurs as a result of lesions in the mammary gland. Studies have shown that the somatic cells count is genetically predisposed. Although the heritability of this trait is low, using modern methods and the proper selection of work it is possible to achieve some progress. Therefore it is necessary to the selection of bulls for somatic cells, on the basis of somatic cells in milk of daughters. Data on milk yield and somatic cell count in milk of 247 cows Holstein Friesian and Simmental breed from Vojvodina Province (Serbia), were used to analyze the evaluation of breeding values for somatic cells in milk Average values and variability of somatic cells, milk yield, milk fat yield and protein and content of milk fat and protein were determined. The average number of somatic cells was 317 000 per ml of milk, with high variability. Average milk yield of 7 634 kg with an average content and yield of milk fat from 3.74% to 285.69 kg and the average protein content and yield of 3.15% and 237.15 kg were determined. Assessment of breeding values was calculated using BLUP model of father, high variability in the assessment of bulls was found. Getting more accurate breeding values is possible using the Animal Model. |
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AbstractList | The incidence of subclinical and clinical mastitis in the mammary gland
produces variety of defensive factors were nuclear leukocytes, lymphocytes
and macrophages play an important role and they are marked as somatic cells.
Somatic cell count depends on the type of pathogen and stage of infection.
Increased number of somatic cells in milk occurs as a result of lesions in
the mammary gland. Studies have shown that the somatic cells count is
genetically predisposed. Although the heritability of this trait is low,
using modern methods and the proper selection of work it is possible to
achieve some progress. Therefore it is necessary to the selection of bulls
for somatic cells, on the basis of somatic cells in milk of daughters. Data
on milk yield and somatic cell count in milk of 247 cows Holstein Friesian
and Simmental breed from Vojvodina province, were used to analyze the
evaluation of breeding values for somatic cells in milk Average values and
variability of somatic cells, milk yield, milk fat yield and protein and
content of milk fat and protein were determined. The average number of
somatic cells was 317 000 per ml of milk, with high variability. Average milk
yield of 7 634kg with an average content and yield of milk fat from 3.74% to
285.69 kg and the average protein content and yield of 3.15% and 237.15 kg
were determined. Assessment of breeding values was calculated using BLUP
model of father, high variability in the assessment of bulls was found.
Getting more accurate breeding values is possible using the Animal Model.
Kod pojave subklinickog i klinickog mastitisa mlecna zlezda produkuje mnostvo
odbrambenih faktora od kojih znacajnu ulogu imaju polimorfo nuklearni
leukociti, limfociti i makrofage koje oznacavamo kao somatske celije. Broj
somatskih celija zavisi od vrste uzrocnika i stadijuma infekcije. Povecan
broj somatskih celija u mleku javlja se kao posledica lezija na mlecnoj
zlezdi. Istrazivanja su pokazala da je broj somatskih celija genetski
predisponiran. Iako je heritabilnost za ovu osobinu niska, uz pomoc
savremenih metoda i pravilnog selekcijskog rada moguce je postici odredjeni
genetski napredak. Zbog toga je potrebno vrsiti selekciju bikova za broj
somatskih celija i to na osnovu broja somatskih celija u mleku cerki. Podaci
o mlecnosti i broju somatskih celija u mleku kod 247 krava holstajn-frizijske
i simentalske rase sa teritorije Vojvodine, korisceni su za analizu ocene
oplemenjivacke vrednosti za broj somatskih celija u mleku krava. Izracunate
su prosecne vrednosti i varijabilnost broja somatskih celija, prinosa mleka,
prinosa mlecne masti i proteina i sadrzaja mlecne masti i proteina. Prosecan
broj somatskih celija u ml iznosio je 317 000, sa velikom varijabilnoscu.
Utvrdjen je prosecan prinos mleka od 7634 kg uz prosecan sadrzaj i prinos
mlecne masti od 3,74% i 285,69kg i prosecan sadrzaj i prinos proteina od
3,15% i 237,15 kg. Ocena oplemenjivacke vrednosti je izracunata primenom BLUP
modela oca, utvrdjena je velika varijabilnost u oceni priplodnjaka. Dobijanje
preciznije oplemenjivacke vrednosti moguce je primenom Animal Modela.
PR Projekat Ministarstva nauke Republike Srbije, br. TR-31086 The incidence of subclinical and clinical mastitis in the mammary gland produces variety of defensive factors were nuclear leukocytes, lymphocytes and macrophages play an important role and they are marked as somatic cells. Somatic cell count depends on the type of pathogen and stage of infection. Increased number of somatic cells in milk occurs as a result of lesions in the mammary gland. Studies have shown that the somatic cells count is genetically predisposed. Although the heritability of this trait is low, using modern methods and the proper selection of work it is possible to achieve some progress. Therefore it is necessary to the selection of bulls for somatic cells, on the basis of somatic cells in milk of daughters. Data on milk yield and somatic cell count in milk of 247 cows Holstein Friesian and Simmental breed from Vojvodina Province (Serbia), were used to analyze the evaluation of breeding values for somatic cells in milk Average values and variability of somatic cells, milk yield, milk fat yield and protein and content of milk fat and protein were determined. The average number of somatic cells was 317 000 per ml of milk, with high variability. Average milk yield of 7 634 kg with an average content and yield of milk fat from 3.74% to 285.69 kg and the average protein content and yield of 3.15% and 237.15 kg were determined. Assessment of breeding values was calculated using BLUP model of father, high variability in the assessment of bulls was found. Getting more accurate breeding values is possible using the Animal Model. |
Author | Đedović, R., Faculty of Agriculture, Belgrade - Zemun (Serbia) Kučević, D., Faculty of Agriculture, Novi Sad (Serbia) Bogdanović, V., Faculty of Agriculture, Novi Sad (Serbia) Radinović, M., Faculty of Agriculture, Novi Sad (Serbia) Trivunović, S., Faculty of Agriculture, Novi Sad (Serbia) |
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SubjectTerms | APTITUD LECHERA APTITUDE LAITIARE BOVIN BOVIN LAITIER BREEDING VALUE BULLS CATTLE CONTEO DE CALULAS SOMAITICAS DAIRY CATTLE GANADO BOVINO GANADO DE LECHE http://www.fao.org/aos/agrovoc#c_1148 http://www.fao.org/aos/agrovoc#c_1391 http://www.fao.org/aos/agrovoc#c_16117 http://www.fao.org/aos/agrovoc#c_2108 http://www.fao.org/aos/agrovoc#c_24276 http://www.fao.org/aos/agrovoc#c_33554 http://www.fao.org/aos/agrovoc#c_4826 LAIT LECHE MILK MILK PERFORMANCE NUMARATION CELLULAIRE SOMATIQUE SOMATIC CELL COUNT TAUREAU TORO VALEUR GANATIQUE VALOR GENATICO |
Title | Evaluation of breeding values of bulls for somatic cell count in milk |
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