Results 11 to 20 of about 46,786 (294)

Genome-Wide Association Study of Age at First Calving in U.S. Holstein Cows. [PDF]

Int J Mol Sci, 2023
A genome-wide association study (GWAS) of age at first calving (AFC) using 813,114 first lactation Holstein cows and 75,524 SNPs identified 2063 additive effects and 29 dominance effects with p-values < 10−8. Three chromosomes had highly significant additive effects in the regions of 7.86–8.12 Mb of Chr15, 27.07–27.48 Mb and 31.25–32.11 Mb of Chr19,
Prakapenka D, Liang Z, Da Y.
europepmc   +5 more sources

Association between age at first calving, year and season of first calving and milk production in Holstein cows

Animal, 2013
The effects of first calving (FC) in Holstein heifers on their first lactation, second lactation and lifetime milk production were examined from an initial database of 459 743 animals that first calved between 1 January 1990 and 31 July 2010 in Wallonia,
E. Froidmont, P. Mayeres, P. Picron, A. Turlot, V. Planchon, D. Stilmant   +5 more
doaj   +5 more sources

Genetic Parameters of Birth Weight and Weaning Weight and Their Relationship with Gestation Length and Age at First Calving in Hanwoo (Bos taurus coreanae). [PDF]

Animals (Basel), 2020
Simple Summary Hanwoo cattle is considered one of the most economically important species and sources of nutrition for Koreans. Thus, both the reproductive performance and growth traits play an important role in the continuous development and ...
Lopez BI, Santiago KG, Seo K, Jeong T, Park JE, Chai HH, Park W, Lim D.   +7 more
europepmc   +2 more sources

Associations between age at first calving and subsequent lactation performance in UK Holstein and Holstein-Friesian dairy cows. [PDF]

PLoS One, 2018
Lactation records from 396,534 pedigree Holstein and Holstein-Friesian primiparous cows from 6,985 UK milk recorded herds, calving for the first time during the period between the 1st of January 2006 and the 31st of December 2008, were examined in order ...
Eastham NT, Coates A, Cripps P, Richardson H, Smith R, Oikonomou G.   +5 more
europepmc   +2 more sources

Influence of age at first calving in a continuous calving season on productive, functional, and economic performance in a Blonde d'Aquitaine beef population. [PDF]

J Anim Sci, 2018
The lifetime production of 7,655 cows with known age at first calving and a total of 27,118 parity records from 301 purebred Blonde d'Aquitaine herds were used to demonstrate the economic benefits of 2 yr of age at first calving.
López-Paredes J, Pérez-Cabal MA, Jiménez-Montero JA, Alenda R.   +3 more
europepmc   +2 more sources

A large-scale study on the effect of age at first calving, dam parity, and birth and calving month on first-lactation milk yield in Holstein Friesian dairy cattle.

Journal of Dairy Science, 2020
Milk yield during first lactation is an important economical trait. Age at first calving (AFC) is considered an important predictor of subsequent milk yield.
M. Van Eetvelde, G. de Jong, K. Verdru, M. van Pelt, M. Meesters, G. Opsomer   +5 more
semanticscholar   +3 more sources

Predicting age at first calving of dairy breed calves using whale optimization-based ensemble learning framework. [PDF]

Sci Rep
Dairy product requirement and the demand-supply gap of milk in Ethiopia have been increasing at an alarming rate due to various factors such as shortage of animal's feeds, feed staffs, feed costs, and poor genetic merits of the local breeds of the country. This problem can be lessened by selecting best breed and modern animal breeding facilities, which
Shekure T, Worku HS, Mohapatra SK, Das TK.   +3 more
europepmc   +4 more sources

Identification of genomic regions related to age at first calving and first calving interval in water buffalo using single‐step GBLUP

Reproduction in Domestic Animals, 2020
AbstractIn Brazil, water buffaloes have been used to produce milk for mozzarella cheese production. Consequently, the main selection criterion applied for the buffalo genetic improvement is the estimated mozzarella yield as a function of milk, fat and protein production.
Francisco Ribeiro de Araujo Neto, Luciana Takada, Daniel Jordan Abreu dos Santos, Rusbel Raul Aspilcueta‐Borquis, Diercles Francisco Cardoso, André Vieira do Nascimento, Karen Martins Leão, Henrique Nunes de Oliveira, Humberto Tonhati   +8 more
openaire   +5 more sources

Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil [PDF]

Revista Brasileira de Zootecnia, 2017
This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between ...
Tatiana Prestes Almeida, Elisandra Lurdes Kern, Darlene dos Santos Daltro, José Braccini Neto, Concepta McManus, André Thaler Neto, Jaime Araujo Cobuci   +6 more
doaj   +5 more sources

The Effect of Age at First Calving and Calving Interval on Productive Life and Lifetime Profit in Korean Holsteins [PDF]

Asian-Australasian Journal of Animal Sciences, 2013
This study was performed to estimate the effect of age at first calving and first two calving intervals on productive life and life time profit in Korean Holsteins.
Changhee Do, Nidarshani Wasana, Kwanghyun Cho, Yunho Choi, Taejeong Choi, Byungho Park, Donghee Lee   +6 more
doaj   +2 more sources