01841naa a2200301 a 450000100080000000500110000800800410001902400390006010000220009924501520012126000090027352008940028265000130117665000190118965000170120865000210122565300180124665300230126470000210128770000200130870000170132870000200134570000280136570000190139370000170141270000180142977300920144721138092019-11-01       2019    bl uuuu     u00u1 u    #d7 a10.1080/09064702.2019.15803082DOI1 aFREITAS, L. A. de  aReduced-rank estimation of genetic parameters for egg production traits and cluster analyses with predicted breeding values.h[electronic resource]  c2019  aAbstract: The aims of this study were to compare the suitability of the multi-trait (MUT) model to estimate genetic parameters with that of 13 reduced-rank principal component models (PC1 to PC13), and then to explore the additive genetic patterns of the breeding values obtained from these using clustering analyses of egg production traits. A total of 1,212 records were used to estimate genetic parameters using the MUT and PC models. The PC4 model was the best representation of the data since it had a lower AIC value and was more parsimonious than the MUT model. The estimated heritability of the age at the first egg (AFE) trait from this model was 0.28 ± 0.06, and the estimated genetic correlation between AFE and total egg production (TP) was −0.52 ± 0.23. Potentially animals from cluster 2 are more likely to be in the selected group to help improve the egg production.  aBreeding  aEgg production  aHeritability  aGenética Animal  aHerdabilidade  aProdução de ovos1 aSAVEGNAGO, R. P.1 aGRUPIONI, N. V.1 aRAMOS, S. B.1 aSTAFUZZA, N. B.1 aFIGUEIREDO, E. A. P. de1 aSCHMIDT, G. S.1 aLEDUR, M. C.1 aMUNARI, D. P.  tActa Agriculturae Scandinavica, Section A ? Animal Sciencegv. 68, n. 2, p. 81-86, 2019