Dairy Cattle
Random regression analysis of test-day milk yields in the first and second lactations of Brazilian Gyr cows
Authors: L.G. Gonzalez-Herrera, L. El Faro, A.B. Bignardi, R.J. Pereira4, C.H.C. Machado and L.G. Albuquerque
The objective of the present study was to estimate the genetic parameters for test-day milk yields (TDMY) in the first and second lactations using random regression models (RRM) in order to contribute to the application of these models in genetic evaluation of milk yield in Gyr cattle. A total of 53,328 TDMY records from 7118 lactations of 5853 Gyr cows w.. Read More»
- Genet. Mol. Res. 14(4):
- 2015
- DOI:
- 10.4238/2015
Association of ATP1A1 gene polymorphism with heat tolerance traits in dairy cattle
Authors: Y.X. Liu, X. Zhou, D.Q. Li, Q.W. Cui and G.L. Wang
Heat stress produces oxidative stress and affects the alternation of plasma K+ and Na+. Since Na+,K+-ATPase is sensitive to oxidative stress and critical for maintaining the homeostasis of these two ions, we examined the genetic polymorphism of the ATP1A1 gene in 160 Holstein cows using polymerase chain reaction low ionic stre.. Read More»
- Genet. Mol. Res. 9(2):
- vol9-2gmr769
- DOI:
- 10.4238/vol9-2gmr769
Single nucleotide polymorphisms in the growth hormone and insulin-like growth factor-1 genes are associated with milk production, body condition score and fertility traits in dairy cows
Authors: M.P. Mullen, C.O. Lynch, S.M. Waters, D.J. Howard, P. O�Boyle, D.A. Kenny, F. Buckley, B. Horan and M.G. Diskin
The somatotrophic axis (GH-IGF) is a key regulator of animal growth and development, affecting performance traits that include milk production, growth rate, body composition, and fertility. The aim of this study was to quantify the association of previously identified SNPs in bovine growth hormone (GH1) and insulin-like growth.. Read More»
- Genet. Mol. Res. 10(3):
- vol10-3gmr1173
- DOI:
- 10.4238/vol10-3gmr1173
Single nucleotide polymorphisms in immunity-related genes and their association with mastitis in Chilean dairy cattle
Authors: A.M. Carvajal, P. Huircan and A. Lepori
Mastitis remains a major cattle disease with great global economic implications. Various approaches are currently employed in attempts to improve understanding of mastitis resistance and develop phenotypic markers for use in breeding programs (e.g., somatic cell score), including QTL discovery, wide-genome association studies, and identification of candid.. Read More»
- Genet. Mol. Res. 12(3):
- 2013.July.30.8
- DOI:
- 10.4238/2013.July.30.8
Milk fatty acid profile is modulated by DGAT1 and SCD1 genotypes in dairy cattle on pasture and strategic supplementation
Authors: A.M. Carvajal, P. Huircan, J.M. Dezamour, I. Subiabre1, B. Kerr, R. Morales and E.M. Ungerfeld
Milk fat composition is important to consumer health. During the last decade, some fatty acids (FA) have received attention because of their functional and beneficial effects on human health. The milk FA profile is affected by both diet and genetics. Differences in milk fat composition are based on biochemical pathways, and ca.. Read More»
- Genet. Mol. Res. 15(2):
- gmr.15027057
- DOI:
- 10.4238/gmr.15027057
Genetic parameters for test day somatic cell score in Brazilian Holstein cattle
Authors: C.N. Costa, G.G. Santos, J.A. Cobuci, G. Thompson and J.G.V. Carvalheira
Selection for lower somatic cell count has been included in the breeding objectives of several countries in order to increase resistance to mastitis. Genetic parameters of somatic cell scores (SCS) were estimated from the first lactation test day records of Brazilian Holstein cows using random-regression models with Legendre polynomials (LP) of the order .. Read More»
- Genet. Mol. Res. 14(4):
- 2015.December.29.21
- DOI:
- 10.4238/2015.December.29.21