Genetic properties of feed efficiency parameters in meat-type chickens

Table 2 Posterior means of genetic correlations (r_a) (95% highest regions intervals) of residual feed intake (RFI) and feed conversion ratio (FCR) parameters in meat-type chickens

Trait^1,2	Period³	r_awith RFI, 28-35 d	r_awith RFI, 35-42 d	r_awith FCR, 28-35d	r_awith FCR, 35-42 d
MBW	28	0.29 (0.29-0.31)	0.49 (0.48-0.49)	0.62 (0.61-0.62)	0.55 (0.55-0.56)
BWG	28-35	0.34 (0.33-0.35)	0.44 (0.43-0.44)	-0.13 (-0.13- -0.12)	0.56 (0.56-0.57)
FI	28-35	0.56 (0.55-0.57)	0.51 (0.51-0.52)	0.45 (0.44-0.46)	0.58 (0.57-0.58)
FCR	28-35	0.31 (0.30-0.31)	0.61 (0.61-0.62)		0.55 (0.54-0.56)
RFI	28-35		0.59 (0.58-0.59)
MBW	35	0.31 (0.30-0.33)	0.45 (0.44-0.46)	0.32 (0.32-0.32)	0.57 (0.56-0.58)
BWG	35-42	-0.05 (-0.06- -0.04)	0.06 (0.05-0.07)	0.04 (0.02-0.05)	-0.14 (-0.14- -0.14)
FI	35-42	0.22 (0.21-0.23)	0.33 (0.33-0.34)	0.53 (0.52-0.54)	0.54 (0.54-0.55)
FCR	35-42	0.56 (0.55-0.56)	0.84 (0.84-0.85)

¹MBW = Metabolic body weight (BW); BWG = BW gain; FI = feed intake; FCR = feed conversion ratio; RFI = residual feed intake
²All traits measured in (g) except for FCR which was (g/g)
³Age (d) or age range (d) that trait was measured

ISSN: 1297-9686