Additive genetic relationships between scrotal circumference, heifer pregnancy, and stayability in Nellore cattle

Journal of Animal Science
M H Van MelisH N Oliveira

Abstract

Scrotal circumference data from 47,605 Nellore young bulls, measured at around 18 mo of age (SC18), were analyzed simultaneously with 27,924 heifer pregnancy (HP) and 80,831 stayability (STAY) records to estimate their additive genetic relationships. Additionally, the possibility that economically relevant traits measured directly in females could replace SC18 as a selection criterion was verified. Heifer pregnancy was defined as the observation that a heifer conceived and remained pregnant, which was assessed by rectal palpation at 60 d. Females were exposed to sires for the first time at about 14 mo of age (between 11 and 16 mo). Stayability was defined as whether or not a cow calved every year up to 5 yr of age, when the opportunity to breed was provided. A Bayesian linear-threshold-threshold analysis via Gibbs sampler was used to estimate the variance and covariance components of the multitrait model. Heritability estimates were 0.42 ± 0.01, 0.53 ± 0.03, and 0.10 ± 0.01, for SC18, HP, and STAY, respectively. The genetic correlation estimates were 0.29 ± 0.05, 0.19 ± 0.05, and 0.64 ± 0.07 between SC18 and HP, SC18 and STAY, and HP and STAY, respectively. The residual correlation estimate between HP and STAY was -0.08 ± 0.03....Continue Reading

References

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Citations

Mar 23, 2012·Animal : an International Journal of Animal Bioscience·M L SantanaE C Mattos
Feb 22, 2014·PloS One·Yuri T UtsunomiyaJosé Fernando Garcia
Nov 5, 2013·The Veterinary Clinics of North America. Food Animal Practice·Alison L Van Eenennaam
Aug 16, 2014·Reproduction in Domestic Animals = Zuchthygiene·J B SiqueiraJ D Guimarães
May 16, 2015·BMC Genomics·Gregório Miguel Ferreira de CamargoStephen S Moore
Feb 1, 2014·Theriogenology·Geoffry FordyceBrian M Burns
Aug 6, 2016·PloS One·Natalia IranoLucia Galvão de Albuquerque
May 24, 2017·Animal : an International Journal of Animal Bioscience·D A GarciaL G Albuquerque
Jun 8, 2017·PloS One·Daniela Barreto Amaral TeixeiraLucia Galvão de Albuquerque
Oct 7, 2015·Journal of Animal Science·L CavaniR Fonseca
Aug 9, 2018·PloS One·André Vieira do NascimentoAlexeia Barufatti Grisolia
Sep 12, 2018·Journal of Animal Science·Ryan J BoldtR Mark Enns
Mar 2, 2018·PloS One·Jurandy Mauro Penitente-FilhoJosé Domingos Guimarães
Nov 22, 2018·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Martin BonamyFernando Baldi
Jul 27, 2020·Translational Animal Science·Madison L ButlerMegan M Rolf
Apr 23, 2014·Journal of Animal Science·A L Van EenennaamD J Drake
Jun 20, 2021·Journal of Applied Genetics·Isis da Costa HermisdorffRaphael Bermal Costa

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