Reduced-rank models of growth and reproductive traits in Nelore cattle

Theriogenology
A A BoligonF R P Souza

Abstract

In beef cattle genetic evaluation, principal component models of the additive genetic effect could be used to incorporate several traits in the same analysis, without an important increase in the number of parameters to be estimated. In this study, multitrait (MT) and reduced-rank models were compared for their ability to estimate parameters and predict breeding values for weaning weight, yearling weight, weaning hip height, yearling hip height, weaning to yearling weight gain, scrotal circumference, and age at the first calving. Data obtained were from 74,388 Nelore animals, born to 1441 sires and 28,502 cows. Six analyses were performed using a MT model that incorporated all the traits simultaneously and five reduced-rank models for the genetic additive direct (co)variance matrix, fitting the first one (PC1), two (PC2), three (PC3), four (PC4), and five (PC5) principal components. The model considering the first three principal components (PC3) provided the best fit. Direct and maternal heritability and the respective standard errors obtained from the MT and PC3 models were similar. In general, the PC3 model provided slightly stronger genetic correlations between the traits when compared with those obtained with the MT model....Continue Reading

References

May 10, 2007·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·K Meyer
Dec 22, 2007·Genetics, Selection, Evolution : GSE·Karin Meyer
May 23, 2012·Genetics and Molecular Research : GMR·I C RegatieriL G Albuquerque
Apr 8, 2014·Animal : an International Journal of Animal Bioscience·M G Diskin, D A Kenny

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Citations

Nov 3, 2020·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Iara Del Pilar Solar DiazRaphael Bermal Costa
Mar 5, 2021·Tropical Animal Health and Production·Pablo Dominguez-CastañoJosineudson Augusto Ii de Vasconcelos Silva
Aug 26, 2021·Animal Science Journal = Nihon Chikusan Gakkaihō·Daniel Duarte da SilveiraArione Augusti Boligon
Nov 30, 2021·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Fernando de Oliveira BussimanJúlio Cesar de Carvalho Balieiro

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