Search Results - "Rosa, G.J.M."

Investigating the effect of temporal, geographic, and management factors on US Holstein lactation curve parameters by Li, M., Rosa, G.J.M., Reed, K.F., Cabrera, V.E.

“…We fit the Wood's lactation model to an extensive database of test-day milk production records of US Holstein cows to obtain lactation-specific parameter…”
Get full text

Comparison of ovarian function and circulating steroids in estrous cycles of Holstein heifers and lactating cows by Sartori, R, Haughian, J M, Shaver, R D, Rosa, G J M, Wiltbank, M C

“…Ovarian function was compared between nulliparous heifers (n = 29; 10 to 16 mo old) and lactating Holstein cows (n = 31; 55.9 +/- 3.5 d postpartum). Follicular…”
Get more information

Predictive ability of direct genomic values for lifetime net merit of Holstein sires using selected subsets of single nucleotide polymorphism markers by Weigel, K A, de los Campos, G, González-Recio, O, Naya, H, Wu, X L, Long, N, Rosa, G J M, Gianola, D

“…The objective of the present study was to assess the predictive ability of subsets of single nucleotide polymorphism (SNP) markers for development of low-cost,…”
Get more information

Genome-enabled prediction of meat and carcass traits using Bayesian regression, single-step genomic best linear unbiased prediction and blending methods in Nelore cattle by Lopes, F.B., Baldi, F., Passafaro, T.L., Brunes, L.C., Costa, M.F.O., Eifert, E.C., Narciso, M.G., Rosa, G.J.M., Lobo, R.B., Magnabosco, C.U.

“…Several methods have been used for genome-enabled prediction (or genomic selection) of complex traits, for example, multiple regression models describing a…”
Get full text

Accuracy of direct genomic values derived from imputed single nucleotide polymorphism genotypes in Jersey cattle by Weigel, K A, de Los Campos, G, Vazquez, A I, Rosa, G J M, Gianola, D, Van Tassell, C P

“…The objective of the present study was to evaluate the predictive ability of direct genomic values for economically important dairy traits when genotypes at…”
Get more information

Mutations in the STAT5A gene are associated with embryonic survival and milk composition in cattle by Khatib, H, Monson, R L, Schutzkus, V, Kohl, D M, Rosa, G J M, Rutledge, J J

“…The objective of this study was to investigate the association of the signal transducer and activator of transcription 5A (STAT5A) gene with fertilization…”
Get more information

Genetic analysis of leukosis incidence in United States Holstein and Jersey populations by Abdalla, E A, Rosa, G J M, Weigel, K A, Byrem, T

“…Bovine leukosis (BL) is a retroviral disease caused by the bovine leukosis virus that affects only cattle. It is associated with decreased milk production and…”
Get more information

The association of bovine PPARGC1A and OPN genes with milk composition in two independent Holstein cattle populations by Khatib, H, Zaitoun, I, Wiebelhaus-Finger, J, Chang, Y M, Rosa, G J M

“…Many studies have reported quantitative trait loci on chromosome 6 that affect milk production traits in dairy cattle. Osteopontin (OPN) and peroxisome…”
Get more information

Dimension reduction and variable selection for genomic selection: application to predicting milk yield in Holsteins by Long, N, Gianola, D, Rosa, G.J.M, Weigel, K.A

“…Genome-assisted prediction of genetic merit of individuals for a quantitative trait requires building statistical models that can handle data sets consisting…”
Get full text

Ovarian structures and circulating steroids in heifers and lactating cows in summer and lactating and dry cows in winter by Sartori, R, Rosa, G J M, Wiltbank, M C

“…Two experiments compared follicular and luteal development and circulating steroid concentrations from induced luteolysis to ovulation in lactating Holstein…”
Get more information

Dissection of additive genetic variability for quantitative traits in chickens using SNP markers by Abdollahi‐Arpanahi, R, Pakdel, A, Nejati‐Javaremi, A, Moradi Shahrbabak, M, Morota, G, Valente, B.D, Kranis, A, Rosa, G.J.M, Gianola, D

“…The aim of this study was to separate marked additive genetic variability for three quantitative traits in chickens into components associated with classes of…”
Get full text

Combined effect of purulent vaginal discharge and anovulation on pregnancy status in a large multi-state population of Holstein cows by Pinedo, P., Santos, J.E.P., Galvão, K.N., Schuenemann, G.M., Chebel, R.C., Bicalho, R.C., Gilbert, R.O., Rodriguez-Zas, S.L., Seabury, C.M., Rosa, G.J.M., Thatcher, W.W.

“…[Display omitted] •Almost half of the study population developed PVD or was anovular at 54 days in milk.•Occurrence of both PVD and ANOV had a significant…”
Get full text

Synchronization rate, size of the ovulatory follicle, and pregnancy rate after synchronization of ovulation beginning on different days of the estrous cycle in lactating dairy cows by Vasconcelos, J.L.M., Silcox, R.W., Rosa, G.J.M., Pursley, J.R., Wiltbank, M.C.

“…Recently a protocol was developed that precisely synchronizes the time of ovulation in lactating dairy cows (Ovsynch; GnRH-7d-PGF 2α-2d-GnRH). We evaluated…”
Get full text

Evaluation of longevity modeling censored records in Nellore by Garcia, D. A., Rosa, G. J. M., Valente, B. D., Carvalheiro, R., Fernandes Júnior, G. A., Albuquerque, L. G.

“…The aim of the present study was to evaluate the prediction ability of models that cope with longevity phenotypic expression as uncensored and censored in…”
Get full text

Short communication: Principal components and factor analytic models for test-day milk yield in Brazilian Holstein cattle by Bignardi, A B, El Faro, L, Rosa, G J M, Cardoso, V L, Machado, P F, Albuquerque, L G

“…A total of 46,089 individual monthly test-day (TD) milk yields (10 test-days), from 7,331 complete first lactations of Holstein cattle were analyzed. A…”
Get more information

Short communication: Effects of the progesterone receptor variants on fertility traits in cattle by Driver, A M, Huang, W, Gajic, S, Monson, R L, Rosa, G J M, Khatib, H

“…The progesterone receptor (PGR) gene is a key factor in the initiation and maintenance of pregnancy and in embryo development. Currently, it is unknown what…”
Get more information

Machine learning classification procedure for selecting SNPs in genomic selection: application to early mortality in broilers by Long, N., Gianola, D., Rosa, G.J.M., Weigel, K.A., Avendaño, S.

“…Summary Genome‐wide association studies using single nucleotide polymorphisms (SNPs) can identify genetic variants related to complex traits. Typically…”
Get full text

Estimates of genetic parameters and eigenvector indices for milk production of Holstein cows by Savegnago, R P, Rosa, G J M, Valente, B D, Herrera, L G G, Carneiro, R L R, Sesana, R C, El Faro, L, Munari, D P

“…The objectives of the present study were to estimate genetic parameters of monthly test-day milk yield (TDMY) of the first lactation of Brazilian Holstein cows…”
Get more information

Genetic evaluation of susceptibility to clinical mastitis in Spanish Holstein cows by Pérez-Cabal, M A, de los Campos, G, Vazquez, A I, Gianola, D, Rosa, G J M, Weigel, K A, Alenda, R

“…This study had 3 objectives: to estimate genetic parameters and predict sires' transmitting abilities for clinical mastitis in a Spanish Holstein population,…”
Get more information

Sampling strategies for total bacterial count of unpasteurized bulk milk by Pantoja, J C F, Rosa, G J M, Reinemann, D J, Ruegg, P L

“…The purpose of this study was to assess bulk tank milk sampling strategies for estimating total bacterial count (TBC). Nine large dairies in Wisconsin that…”
Get more information