Genetic parameters for body weight and different definitions of residual feed intake in broiler chickens

Mebratie, Wossenie; Madsen, Per; Hawken, Rachel; Romé, Hélène; Marois, Danye; Henshall, John; Bovenhuis, Henk; Jensen, Just

doi:10.1186/s12711-019-0494-2

Genetics Selection Evolution

Table 3 Posterior means of genetic correlations between body weight (BW), feed intake (FI), and body weight gain (Gain)

From: Genetic parameters for body weight and different definitions of residual feed intake in broiler chickens

Trait	\({\text{BW}}_{{{\text{m}}\left( {\text{t}} \right)}}\)	\({\text{BW}}_{{{\text{f}}\left( {\text{t}} \right)}}\)	\({\text{BW}}_{{{\text{m}}\left( {t - 6} \right)}}\)	\({\text{BW}}_{{{\text{f}}\left( {{\text{t}} - 6} \right)}}\)	\({\text{FI}}_{{{\text{m}}\left( {\text{t}} \right)}}\)	\({\text{FI}}_{{{\text{f}}\left( {\text{t}} \right)}}\)	\({\text{FI}}_{{{\text{m}}\left( {{\text{t}} - 6} \right)}}\)	\({\text{FI}}_{{{\text{f}}\left( {{\text{t}} - 6} \right)}}\)	\({\text{Gain}}_{{{\text{m}}\left( {\text{t}} \right)}}\)	\({\text{Gain}}_{{{\text{f}}\left( {\text{t}} \right)}}\)	\({\text{Gain}}_{{{\text{m}}\left( {{\text{t}} - 6} \right)}}\)
\({\text{BW}}_{{{\text{m}}\left( {\text{t}} \right)}}\)
\({\text{BW}}_{{{\text{f}}\left( {\text{t}} \right)}}\)	0.90^a
\({\text{BW}}_{{{\text{m}}\left( {{\text{t}} - 6} \right)}}\)	0.84^g	0.82
\({\text{BW}}_{{{\text{f}}\left( {{\text{t}} - 6} \right)}}\)	0.78	0.87^g	0.90^b
\({\text{FI}}_{{{\text{m}}\left( {\text{t}} \right)}}\)	0.49	0.41	0.44	0.37
\({\text{FI}}_{{{\text{f}}\left( {\text{t}} \right)}}\)	0.53	0.60	0.52	0.59	0.82^c
\({\text{FI}}_{{{\text{m}}\left( {{\text{t}} - 6} \right)}}\)	0.50	0.44	0.51	0.48	0.76^g	0.75
\({\text{FI}}_{{{\text{f}}\left( {{\text{t}} - 6} \right)}}\)	0.60	0.57	0.55	0.63	0.77	0.88^g	0.86^d
\({\text{Gain}}_{{{\text{m}}\left( {\text{t}} \right)}}\)	0.25	0.20	0.25	0.16	0.87	0.64	0.59	0.55
\({\text{Gain}}_{{{\text{f}}\left( {\text{t}} \right)}}\)	0.21	0.30	0.24	0.29	0.69	0.82	0.60	0.68	0.75^e
\({\text{Gain}}_{{{\text{m}}\left( {{\text{t}} - 6} \right)}}\)	0.46	0.42	0.45	0.42	0.67	0.68	0.88	0.73	0.64^g	0.68
\({\text{Gain}}_{{{\text{f}}\left( {{\text{t}} - 6} \right)}}\)	0.49	0.47	0.47	0.50	0.73	0.79	0.82	0.89	0.67	0.78^g	0.81^f

Trait descriptions are as defined in Table 2
Numbers in italic characters are genetic correlations between traits at the same sex and age
^a–fGenetic correlations of traits between males and females within ages
^gGenetic correlations of traits between ages within sexes

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ISSN: 1297-9686

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