Results 31 to 40 of about 46,786 (294)

The effect of age at first calving on the milking performance of primiparous Jersey cows [PDF]

Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego, 2021
The aim of this study was to determine the effect of age at first calving on the milking performance of primiparous Jersey cows (261 cows). Analyses were conducted on 2461 test day milking samples from 17.09.2007 to 26.07.2016.
Jarosław Pytlewski, Ireneusz Ryszard Antkowiak   +1 more
doaj   +1 more source

Genetic parameters for milk yield, age at first calving and interval between first and second calving in milk buffaloes

Italian Journal of Animal Science, 2010
Genetic parameters for the relation between the traits of milk yield (MY), age at first calving (AFC) and interval between first and second calving (IBFSC) were estimated in milk buffaloes of the Murrah breed.
R.R. Aspilcueta Borquis, R.C. Sesana, L. El Faro, V.L. Cardoso, H. Tonhati, L. de Oliveira Seno   +5 more
doaj   +4 more sources

Phenotypic and genetic relationships between age at first calving, its component traits, and survival of heifers up to second calving.

Journal of Dairy Science, 2018
J. Heise, K. Stock, F. Reinhardt, N. Ha, H. Simianer   +4 more
semanticscholar   +3 more sources

Identification of markers for functional traits in Murrah buffaloes

Indian Journal of Animal Sciences, 2021
Twelve half sib families were created and two functional traits, viz. age at first heat and age at first calving were recorded for 4,851 and 946 daughters belonging to 12 sires.
UPASNA SHARMA, PRIYANKA BANERJEE, JYOTI JOSHI, PRERNA KAPOOR, MEENAL RAHEJA, RAMESH KUMAR VIJH   +5 more
doaj   +1 more source

Association of the age and bodyweight at first calving with the reproductive and productive performance in one herd of Holstein dairy heifers in Japan

Veterinary Record Open, 2022
Background Reducing the age at first calving (AFC) in dairy heifers may decrease replacement costs, while the acceleration of body growth could affect milk productivity.
H. Kusaka, T. Yamazaki, M. Sakaguchi
semanticscholar   +1 more source

Relationship between primiparas first 100-days lactation and their lifetime milk production in Polish Holstein-Friesian Cattle [PDF]

Journal of Central European Agriculture, 2015
The aim of this study was to identify the relationship between the lifetime performance of cows and their performance during the first 100 days of lactation.
Beata SITKOWSKA, DARIUSZ Piwczyński, Zbigniew Lach, Magdalena KOLENDA   +3 more
doaj   +1 more source

Effect of age at first calving on some productive and longevity traits in Iranian Holsteins of the Isfahan province.

Journal of Dairy Science, 2004
M. A. Nilforooshan, M. Edriss
semanticscholar   +3 more sources

Heterogeneity of genetic parameters for calving difficulty in Holstein heifers in Ireland [PDF]

, 2007
Calving difficulty is a trait that greatly affects animal welfare, herd profitability, and the amount of labor required by cattle farmers. It is influenced by direct and maternal genetic components.
A.R. Cromie, Akaike, Arango, Belic, Bennett, Berger, Calus, Crump, Cue, D.A. Kenny, Dekkers, Gilmour, Groen, J.M. Hickey, Jamrozik, Jensen, Luo, M.G. Keane, Manfredi, Meijering, Menissier, Meyer, Meyer, Misztal, Naazie, Olori, Osinga, P.R. Amer, Philipsson, Pool, R.F. Veerkamp, Schmitz, Schwarz, Steinbock, Visscher, Weller, Weller, Wiggans   +37 more
core   +8 more sources

Evaluation of breeding objectives, breeding practices and reproductive performance of indigenous dairy cows in selected districts of Kaffa Zone, South West Ethiopia

Veterinary Medicine and Science, 2023
Background Breeding objectives are designed to achieve targeted dairy cow production goals, which can be affected by production type, farmer preferences, environmental factors and genetic factors individually or in combination.
Yakob Asfaw, Regasa Begna, Worku Masho
doaj   +1 more source

Relationship between Growth Pattern, Age at First Calving and Next Reproduction in Holstein Heifers

Journal of Animal Reproduction and Biotechnology, 2015
Growth rate during rearing, which varies depending on provided nutrition, has been related with age at 1st calving (AFC). This study investigated the effect of upgrowth parameters during the rearing period on the reproduction of nulliparous Holstein ...
Hyun-Joo Lim, Ho-Beak Yoon, Seok-Ki Im
doaj   +1 more source