The influence of BoLA-DRB3 alleles on incidence of clinical mastitis, cystic ovary disease and milk traits in Holstein Friesian cattle

2018 ◽  
Vol 45 (5) ◽  
pp. 917-923 ◽  
Author(s):  
Joanna Pokorska ◽  
Dominika Kułaj ◽  
Magdalena Dusza ◽  
Andrzej Ochrem ◽  
Joanna Makulska
2000 ◽  
Vol 43 (2) ◽  
pp. 115-122
Author(s):  
H. Atil ◽  
A. S. Khattab

Abstract. A total of 1931 normal first lactation records of Holstein Friesian cows kept at Dena Farm in Egypt during the period from 1987 to 1994 were used to estimate phenotypic and genetic parameters for 90 day milk yield (90 dMY), 305 day milk yield (305 dMY) and lactation period (LP). In addition, 76 bulls with at least ten daughters were used to compare three methods of sire transmitting ability. A least Squares analysis of variance show significant effect of month and year of calving and age at first calving for different traits studied, except the effect of age at first calving on LP. Heritability estimates for 90 dMY, 305 dMY and LP were 0.39 ± 0.08, 0.27 ± 0.07 and 0.14 ± 0.05, respectively. Genetic and phenotypic correlations between different traits were positive and significant. Sires with at least ten daughters were evaluated by best linear unbiased prediction (BLUP), least Squares means (LSM) and regression of the future daughters mean on the present daughters mean. The product moment correlations between different traits studied were positive and high (= 0.96).


2001 ◽  
Vol 1 (8) ◽  
pp. 737-741 ◽  
Author(s):  
Hulya Atil ◽  
A. Salah Khattab . ◽  
Cigdem Yakupoglu .

animal ◽  
2019 ◽  
Vol 13 (10) ◽  
pp. 2156-2163 ◽  
Author(s):  
J. Szyda ◽  
M. Mielczarek ◽  
M. Frąszczak ◽  
G. Minozzi ◽  
J.L. Williams ◽  
...  

2021 ◽  
Vol 185 ◽  
pp. 106133
Author(s):  
William Andrew ◽  
Jing Gao ◽  
Siobhan Mullan ◽  
Neill Campbell ◽  
Andrew W. Dowsey ◽  
...  

2007 ◽  
Vol 2007 ◽  
pp. 110-110
Author(s):  
R.M. Kirkland ◽  
D.C. Patterson ◽  
B.W. Moss ◽  
T.W.J. Keady ◽  
R.W.J. Steen

Any evaluation of breeds or production systems for beef must consider effects on production, carcass and meat quality characteristics. Holstein-Friesian (HF) cattle are bred for dairy traits only, while Norwegian dairy cattle (NOR) have been selected with some emphasis on beef characteristics. A comparison of production data from bulls of these two breeds has been presented previously (Kirkland et al., 2005). The objective of the present study was to evaluate specific carcass and meat quality parameters of HF and NOR bulls.


2020 ◽  
Vol 56 (3) ◽  
pp. 333-338
Author(s):  
P. Sablik ◽  
A. Klenowicz ◽  
M. Szewczuk ◽  
A. Olszewski ◽  
A. Dybus

2007 ◽  
Vol 40 (3) ◽  
pp. 169-173 ◽  
Author(s):  
Amir H. Shahmoradi ◽  
Reza Arefpajohi ◽  
Keyvan Tadayon ◽  
Nader Mosavari

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