SciELO - Scientific Electronic Library Online

 
vol.37 issue7New functions to estimate 305-days milk production of Gir cowsPhosphorus digestibility from vegetal feed origins determined in growing and finishing pigs author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista Brasileira de Zootecnia

Print version ISSN 1516-3598On-line version ISSN 1806-9290

Abstract

VAYEGO, Stela Adami; DIONELLO, Nelson José Laurino  and  FIGUEIREDO, Elsio Antonio Pereira de. Estimates of genetic parameters and trends for performance traits in paternal broiler lineages under selection. R. Bras. Zootec. [online]. 2008, vol.37, n.7, pp.1230-1235. ISSN 1806-9290.  https://doi.org/10.1590/S1516-35982008000700013.

Estimates of genetic and phenotypic parameters for performance traits in paternal broiler lineages selected during 12 generations were obtained through mixed models methodology. Data consisting of body weight (P42), breast length (CPeito), largest (Larg1) and smallest (Larg2) breast widths recorded at 42 days of age in approximately 46,000 birds between 1992 and 2003 provided by CNPSA/EMBRAPA were used to estimate (co)variances by REML. The heritability estimates were moderate, ranging from 0.29 to 0.53. Genetic correlations estimates between P42 and CPeito, Larg1 and Larg2 were 0.68, 0.65 and 0.48 respectively. Genetic trend estimates indicate that progress has been obtained by selection on the performance traits.

Keywords : broilers; genetic parameters; genetic trend; mixed models; REML.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License