scholarly journals Genetic study of quantitative traits supports the use of Guzerá as dual-purpose cattle

2022 ◽  
Author(s):  
Eula Regina Carrara ◽  
Maria Gabriela Campolina Diniz Peixoto ◽  
Renata Veroneze ◽  
Fabyano Fonseca e Silva ◽  
Pedro Vital Brasil Ramos ◽  
...  
Keyword(s):  
Genetic Study ◽  
Quantitative Traits ◽  
Dual Purpose ◽  
Dual Purpose Cattle

scholarly journals Genetic relationship between type traits, number of lactations initiated, and lifetime milk performance in Czech Fleckvieh cattle

2017 ◽  
Vol 62 (No. 12) ◽  
pp. 501-510 ◽  
Author(s):  
L. Novotný ◽  
J. Frelich ◽  
J. Beran ◽  
L. Zavadilová
Keyword(s):  
Body Size ◽  
Milk Production ◽  
Genetic Relationship ◽  
Genetic Correlations ◽  
Bivariate Analysis ◽  
Dual Purpose ◽  
Lifetime Performance ◽  
Dual Purpose Cattle ◽  
Type Traits ◽  
Milk Performance

Genetic relationship was analyzed between type traits and longevity measures in dual-purpose cattle. Data from 91 486 Czech Fleckvieh cows first calved between 2003 and 2009 were used. Longevity was defined as the actual number of lactations initiated per cow and also as functional longevity, which incorporated an adjustment to account for variation in voluntary culling based upon milk production. Lifetime performance was defined as cumulative milk production through the 6<sup>th</sup> parity. All cows were scored for conformation traits during their first lactation. Genetic correlations between these traits and longevity measures were estimated by bivariate analysis using the DMU variance component program package. Type trait heritabilities ranged from 0.30 to 0.59, while heritabilities for longevity and functional longevity were 0.06 and 0.05, respectively. Heritability of lifetime performance was 0.08. Genetic correlations between type traits and longevity measures ranged from low to intermediate values. Genetic correlations of the measured body size traits to the real and functional longevity ranged from –0.06 to –0.29, for udder traits from –0.02 to 0.33, and for foot and leg traits from –0.03 to 0.17. Genetic correlations between the measured body size traits and lifetime performance ranged from –0.03 to –0.30, for udder traits from 0.05 to 0.47, for foot and leg traits from –0.07 to 0.15. Genetic correlations of composite trait scores for frame, muscularity, feet and legs, and udder with longevity traits ranged from –0.20 to 0.41 and for lifetime performance –0.14 to 0.51. The highest genetic correlations between a type trait and functional longevity were for composite udder score (0.25), feet and legs (0.26), and udder depth (0.33), suggesting that these traits could serve as indicators of functional longevity. We conclude that selection based upon easily and inexpensively measured type traits could improve functional longevity of cows as well as lifetime milk production.

scholarly journals Colostrum composition and immunoglobulin G content in dairy and dual-purpose cattle breeds

2020 ◽  
Vol 98 (8) ◽  
Author(s):  
Evelyne C Kessler ◽  
Rupert M Bruckmaier ◽  
Josef J Gross
Keyword(s):  
Dairy Cows ◽  
Immunoglobulin G ◽  
Passive Immunization ◽  
Mature Milk ◽  
Dual Purpose ◽  
Cattle Breeds ◽  
Holstein Friesian ◽  
Essential Components ◽  
Dual Purpose Cattle ◽  
And Performance

Abstract Immunoglobulins (Ig) are essential components in the colostrum of bovine species that enable passive immunization of newborn calves. Concentrations of fat and protein are greater in colostrum compared with mature milk and represent a vital source of energy and nutrients. Colostral IgG was shown to vary between individual dairy cows, but comparative data on different breeds and performance levels are scarce. The objective of the present field study was to investigate the contents of total IgG, fat, protein, and lactose in colostrum in different Swiss and German dairy and dual-purpose breeds. We collected colostrum samples of 458 cows of 13 different breeds (dairy breeds: Brown Swiss, Swiss and German Holstein Friesian, and New Zealand Holstein; dual-purpose breeds: German Fleckvieh, Holstein Friesian × Montbéliarde, Montbéliarde, Murnau-Werdenfels, Original Braunvieh, Pinzgauer, Rhetic Gray, and Simmental; and beef-type crossbred: Charolais × Holstein Friesian). Colostrum samples were obtained between 5 and 900 min after calving and analyzed for total IgG, fat protein, and lactose contents. Immunoglobulin G concentrations varied between 12.7 and 204.0 mg/mL. No effect of breeding purpose (i.e., dairy or dual-purpose) nor of previous lactation yield on IgG content was observed. However, milking of cows for the first time later than 12 h after parturition resulted in lower colostrum IgG concentrations compared with colostrum harvest within 9 h after calving (P &lt; 0.05). Multiparous cows had a higher colostral IgG concentration than primiparous cows (P &lt; 0.0001). Overall, concentrations of IgG and other constituents in colostrum varied widely in the different cattle breeds. High-yielding dairy cows did not have poorer colostrum quality compared with lower-yielding animals or beef and dual-purpose breeds, which suggests an individually different transfer of circulating IgG into colostrum.

The Breeding of Dual Purpose Cattle

1944 ◽  
Vol 1944 (01) ◽  
pp. 15-27
Author(s):  
W. S. Mansfield
Keyword(s):  
Major Part ◽  
Dairy Herd ◽  
Farm Income ◽  
Dairy Farmers ◽  
Dual Purpose ◽  
Small Minority ◽  
Dairy Farmer ◽  
Dual Purpose Cattle ◽  
The Subject ◽  
Definition Of

Though this paper is on the subject of Dual Purpose Cattle it is in no sense a defence of them, not because I am not a devout believer in them myself, but because I am certain that before a learned body such as this they need no defence. Still less is it necessary for me to prove to you that such cattle really exist, though even this has been questioned. But though I do not think it necessary to defend them, I should like first of all to say something about their place in the general economy of our English farming. (I say English advisedly, for there have never been many dual purpose cattle in Scotland, perhaps because the conditions are not suitable.) It is a fact often overlooked that only a small proportion of our milk producing farmers are dairy farmers in the true sense of the term. A dairy farmer is surely one who draws the major part of his farm income, if not the whole of it, from his dairy herd. In other words, he is a specialist. If this definition of a dairy farmer is accepted then I submit that dairy farmers form a small minority of those farmers who keep milch cattle, and by all means let them keep pure dairy breeds.

Prevalence of and risk factors for bovine respiratory syncytial virus (BRSV) infection in non-vaccinated dairy and dual-purpose cattle herds in Ecuador

2012 ◽  
Vol 44 (7) ◽  
pp. 1423-1427 ◽  
Author(s):  
Luis Rodrigo Saa ◽  
Anselmo Perea ◽  
Diego Vinicio Jara ◽  
Antonio José Arenas ◽  
Ignacio Garcia-Bocanegra ◽  
...  
Keyword(s):  
Risk Factors ◽  
Respiratory Syncytial Virus ◽  
Bovine Respiratory Syncytial Virus ◽  
Dual Purpose ◽  
Dual Purpose Cattle ◽  
Cattle Herds ◽  
Syncytial Virus

scholarly journals Investigation of the DGAT1 K232A and VNTR mutations in dairy and dual purpose cattle breeds

2007 ◽  
Vol 6 (sup1) ◽  
pp. 137-137 ◽  
Author(s):  
L. Fontanesi ◽  
E. Scotti ◽  
F. Schiavini ◽  
V. La Mattina ◽  
R. Davoli ◽  
...  
Keyword(s):  
Dual Purpose ◽  
Cattle Breeds ◽  
Dual Purpose Cattle

scholarly journals Investigation of allele frequencies of the growth hormone receptor(GHR) F279Ymutation in dairy and dual purpose cattle breeds

2007 ◽  
Vol 6 (4) ◽  
pp. 415-420 ◽  
Author(s):  
Luca Fontanesi ◽  
Emilio Scotti ◽  
Marco Tazzoli ◽  
Francesca Beretti ◽  
Stefania Dall’Olio ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
Allele Frequencies ◽  
Dual Purpose ◽  
Cattle Breeds ◽  
Dual Purpose Cattle

scholarly journals Variation of Detailed Protein Composition of Cow Milk Predicted from a Large Database of Mid-Infrared Spectra

Animals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 176 ◽  
Author(s):  
Marco Franzoi ◽  
Giovanni Niero ◽  
Giulio Visentin ◽  
Mauro Penasa ◽  
Martino Cassandro ◽  
...  
Keyword(s):  
Infrared Spectra ◽  
Protein Composition ◽  
Protein Fractions ◽  
Cow Milk ◽  
Fat Percentage ◽  
Dual Purpose ◽  
Factors Affecting ◽  
Dual Purpose Cattle ◽  
Milk Urea ◽  
Β Lactoglobulin

This study aimed to investigate factors affecting protein fractions, namely α-casein (α-CN), β-casein (β-CN), κ-casein (κ-CN), β-lactoglobulin (β-LG) and α-lactalbumin (α-LA) predicted from milk infrared spectra in milk of dairy and dual-purpose cattle breeds. The dataset comprised 735,328 observations from 49,049 cows in 1782 herds. Results highlighted significant differences of protein fractions in milk of the studied breeds. Significant variations of protein fractions were found also through parities and lactation, with the latter thoroughly influencing protein fractions percentage. Interesting correlations (r) were estimated between β-CN, κ-CN and β-LG, expressed as percentage of crude protein, and milk urea nitrogen (r = 0.31, −0.20 and −0.26, respectively) and between α-LA and fat percentage (r = 0.41). The present study paves the way for future studies on the associations between protein fractions and milk technological properties, and for the estimation of genetic parameters of predicted protein composition.

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