Effect of herd environment on the genetic and phenotypic relationships among milk yield, conception rate, and somatic cell score in Holstein cattle

Simple item page
AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:33:06Z
Fecha de publicación2000-01-01
ResumenA total of 248,230 primiparous records of Holstein cows calving from 1987 to 1994 (daughters of 588 sires in 3042 herds) was used to evaluate potential genotype by environment interactions among mature equivalent milk yield, lactation mean somatic cell score, and conception rate at first service. Herds were classified into low and high environmental groups using three different criteria: standard deviation of herd mature equivalent milk yield, a combination of herd mature equivalent milk yield mean and standard deviation, and the herd mean of body weight at first calving divided by age at first calving. Genetic parameters were modeled by using multiple-trait linear mixed models and were fitted using the multiple-trait derivative-free software. Heritabilities for mature equivalent milk yield, lactation mean somatic cell score, and conception rate at first service were 0.221, 0.106, and 0.015 in low environment herds and 0.300, 0.093, and 0.009 in high environment herds, respectively. Genetic (and phenotypic) correlations between mature equivalent milk yield and lactation mean somatic cell score, mature equivalent milk yield and conception rate at first service, and lactation mean somatic cell score and conception rate at first service were 0.277, -0.417, and -0.209, (-0.049, -0.180, and -0.040) and 0.173, -0.318, and -0.144, (-0.087, -0.166, and -0.035) in low and high environment herds, respectively. The genetic correlations between pairs of traits were consistently smaller in high environment herds, suggesting that differences in management between the two environment levels lessened the antagonistic genetic association between the traits studied. A long-range plan for low environment herds should focus on improving the level of management, which would greatly reduce the unfavorable correlated changes in lactation mean somatic cell score and conception rate at first service associated with the genetic improvement of mature equivalent milk yield.es_ES
Doihttps://doi.org/10.3168/jds.s0022-0302(00)74943-5es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/4910
Idiomaenes_ES
EditorialAMER DAIRY SCIENCE ASSOCes_ES
RelaciónJournal of Dairy Sciencees_ES
URL relacionadohttps://doi.org/10.3168/jds.s0022-0302(00)74943-5es_ES
DerechosAcceso abierto (Metadatos de producción científica)es_ES
Licenciahttp://purl.org/coar/access_right/c_abf2es_ES
FuenteJournal of Dairy Science
Palabra clavemilk yieldes_ES
Palabra claveconception ratees_ES
Palabra clavesomatic cell scorees_ES
Palabra clavemanagementes_ES
TítuloEffect of herd environment on the genetic and phenotypic relationships among milk yield, conception rate, and somatic cell score in Holstein cattlees_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorCastillo-Juarez, H
AutorOltenacu, PA
AutorBlake, RW
AutorMcculloch, CE
AutorCienfuegos-Rivas, EG
AutorCastillo-Juarez, Hes_ES
AutorOltenacu, PAes_ES
AutorBlake, RWes_ES
AutorMcculloch, CEes_ES
AutorCienfuegos-Rivas, EGes_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número4es_ES
Rango de páginas807-814es_ES
URL relacionadahttps://doi.org/10.3168/jds.s0022-0302(00)74943-5
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen83es_ES

Files

Collections

Documentación Cientifica