Genetic Parameters of First Lactation Milk Yield and Fertility Traits in Brown Swiss Cattle [PDF]
Annals of Animal Science, 2014 Abstract This research was carried out to estimate variance components and genetic parameters for first lactation milk yield (lactation milk yield, 305-day milk yield, lactation length, and dry period) and some fertility traits (calving interval, gestation length and number of services per conception) of Brown swiss cattle reared at ...
Adkinson, Robert W. +3 more
openaire +4 more sources
Associations between sole ulcer, white line disease and digital dermatitis and the milk yield of 1824 dairy cows on 30 dairy cow farms in England and Wales from February 2003–November 2004 [PDF]
, 2008 The milk yields of 1824 cows were used to investigate the effect of lesion-specific causes of lameness, based on farmer treatment and diagnosis of lame cows, on milk yield.
Wright, JL +15 more
core +1 more source
Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep
Scientific Papers Animal Science and Biotechnologies, 2023 The objective of this study was to determine the genetic parameters represented by heritability for test-day milk yield and the genetic correlation between test-days milk yield and the breeding value for Teleorman Black Head sheep. The genetic parameters
Rodica Stefania Pelmus +6 more
doaj
Genetic profile of total body energy content of Holstein cows in the first three lactations [PDF]
, 2005 Weekly total body energy content (TBEC) was calculated for 444 Holstein cows in their first 3 lactations. These calculations were based on body lipid and protein changes predicted from weekly changes in body condition score and live weight of each cow ...
Banos, G +3 more
core +1 more source
ANALYSIS OF THE RELATIONSHIP BETWEEN FIRST THREE LACTATIONS OF HOLSTEIN COWS [PDF]
Poljoprivreda, 2005 The objective of this study was to evaluate relationship between milk yield in the first three lactations regarding levels of milk yield in the first lactation and levels of age at the first calving.
Vesna Gantner +2 more
doaj
Animal, 2013 We investigated the relationships between conception rates (CRs) at first service in Japanese Holstein heifers (i.e. animals that had not yet had their first calf) and cows and their test-day (TD) milk yields.
K. Hagiya +10 more
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Modeling daily energy balance of dairy cows in the first three lactations [PDF]
, 2005 Daily energy balance was calculated for 111 Holstein cows in their first 3 lactations, based on combinations of smoothed preadjusted phenotypic records for milk yield, feed intake, live weight, and body condition score.
Banos, G, Coffey, MP, Brotherstone, S
core +1 more source
Effect of Calf Gender on Milk Yield and Fatty Acid Content in Holstein Dairy Cows. [PDF]
PLoS ONE, 2017 The scale of sexed semen use to avoid the birth of unwanted bull calves in the UK dairy industry depends on several economic factors. It has been suggested in other studies that calf gender may affect milk yield in Holsteins- something that would affect ...
Amy V Gillespie +2 more
doaj +1 more source
Prediction of 305-day first lactation milk yield by ratio method
The Indian Journal of Animal Sciences, 2014 First lactation milk records from 1976 to 2004 on 453 buffaloes, sired by 51 bulls, maintained at Network Project on Buffalo, Livestock Research Station, Vallabhnagar were utilized for prediction of 305-day first lactation milk yield (305 FLMY). The milk production levels were predicted from records in progress (fortnightly, monthly and bimonthly test ...
SHANKER SINGH, S P TAILOR
openaire +1 more source
Genetic parameters for milk somatic cell score and relationships with production traits in primiparous dairy sheep [PDF]
, 2007 A total of 13,066 first-lactation test-day records of 2,277 Valle del Belice ewes from 17 flocks were used to estimate genetic parameters for somatic cell scores (SCS) and milk production traits, using a repeatability test-day animal model.
van Kaam, J. B. C. H. M. +12 more
core +1 more source