Energy and nitrogen metabolism and insulin response to glucose challenge in lactating German Holstein and Charolais heifers

Pareek, Nawal Kishor; Voigt, J.; Bellmann, O.; Schneider, Falk; Hammon, H.M.

doi:10.1016/j.livsci.2007.02.001

Cited by 15 publications

(23 citation statements)

References 29 publications

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“…It could be assumed that F 2 heifers were in a positive energy balance from the beginning of lactation just as assumed for other F 2 heifers of the same experiment ). Low milk yield in both lactation periods is consistent with the low milk production in Charolais cows, but was too low when compared with the high production of the German Holstein cows (Pareek et al 2007). Milk yield increased with progress of age in consistence with Bajwa et al (2004) who reported increase in milk yield with increase in parity.…”

Section: Discussionsupporting

confidence: 69%

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Meat quality traits and muscle composition of cows differing in lactation performance

et al. 2012

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Beef and dairy cows differ in the way in which they utilise nutrients and in accretion or mobilisation of body reserves during lactation. Thus far, little is known about the impact of lactation performance on body composition, meat quality, and the related muscle structure of cows with a defined, combined beef and dairy genetic background. In the described experiment, 50 F 2 cows, originating from mating Charolais bulls to German Holstein cows and a following intercross of F 1 individuals, were slaughtered during the second lactation, 30 days after calving. Cows were assigned to 3 groups, each containing representatives of 3 families, according to lactation performance. Standard carcass and meat quality traits were determined. Additionally, samples from longissimus muscle were investigated by histology and computer image analysis for muscle fibre profile, intramuscular fat cell size, and marbling traits. Subcutaneous fat cell size was measured to estimate the impact of lactation on body fat reserves. The results suggest no influence of the duration of the first lactation on body composition, meat quality or muscle structure. However, the amount of milk per day influenced body weight, body composition, and marbling traits. Relationships between traits were low, but showed consistently that increasing milk yield was negatively correlated with tissue accretion. Changes of muscle fibre and fat cell profile, indicating protein or fat mobilisation by lactation, could not be detected. In the presented study, lactation had only minor consequences for meat quality.

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Section: Discussionsupporting

confidence: 69%

“…Beef and dairy cattle represent divergent metabolic types that disseminate nutrients preferably into either meat or milk and differ in nutrient accretion (Pareek et al 2007, Lahann et al 2010. Charolais as a typical beef breed is known for the distinct nutrient accretion and low milk yield.…”

Section: Introductionmentioning

confidence: 99%

Meat quality traits and muscle composition of cows differing in lactation performance

et al. 2012

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“…The milk yield was lower in the low lactating groups of F 2 offspring than in Charolais cows (Jenkins and Ferrell, 1992;Pareek et al, 2007;Sinclair et al, 1998). Even members of the HL group in our study cannot be considered as dairy cows and their milk yield was far below that of the Holstein P0 founder breed (see Pareek et al, 2007). Therefore, these cows can be seen as a model for beef cows in cow-calf operations for beef production.…”

Section: Discussionmentioning

confidence: 60%

Changes of muscle fibre profile and fat cell size around first parturition in cows differing in lactation performance

et al. 2015

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“…Since F > F crit , the determination coefficient is significant, and, in general, empirical regression equations are statistically reliable. Student's t-test confirmed the statistical significance of the coefficients a and b in the nonlinear regression equation y=ax 2 …”

Section: Methodsmentioning

confidence: 71%

“…It is the practice to estimate quantitative characteristics, which include milk-producing ability and fat and protein content in milk, by the phenotype and by manifestation of these characteristics in the conditions where the body grows and develops (1)(2)(3)(4)(5)(6)(7). Today, the dairy cow population in farms in the Russian Federation has 19 breeds and 23 types of stud cattle and inbreeding.…”

Section: Introductionmentioning

confidence: 99%

Productivity and adaptation ability of Holstein cattle of different genetic selections

Gorlov¹,

Bozhkova²,

Shakhbazova³

et al. 2016

Turk J Vet Anim Sci

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Energy and nitrogen metabolism and insulin response to glucose challenge in lactating German Holstein and Charolais heifers

Cited by 15 publications

References 29 publications

Meat quality traits and muscle composition of cows differing in lactation performance

Meat quality traits and muscle composition of cows differing in lactation performance

Changes of muscle fibre profile and fat cell size around first parturition in cows differing in lactation performance

Productivity and adaptation ability of Holstein cattle of different genetic selections

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