Quantifying the genetic parameters of feed efficiency in juvenile Nile tilapia Oreochromis niloticus

BMC Genomic Data

Table 2 Estimates (± standard error) of heritability (highlighted in grey, on the diagonal), genetic correlations (above diagonal) and phenotypic correlations (below diagonal) for all the traits measured

Growth traits and feed intake								Feed efficiency traits
Trait1	BWi	BWf	TGC_LOSS	TGC_COMP	BWG	TGC_FI	FI	FCR	RFI
Growth traits and feed intake
BWi	0.65 ± 0.11	0.99 ± 0.01	0.08 ± 0.26	ne	0.86 ± 0.08	0.33 ± 0.26	0.77 ± 0.08	0.11 ± 0.21	0.01 ± 0.18
BWf	0.95	0.60 ± 0.11	− 0.01 ± 0.25	ne	0.93 ± 0.04	0.47 ± 0.21	0.77 ± 0.08	0.08 ± 0.22	0.07 ± 0.19
TGC_LOSS	0.03	0.02	0.23 ± 0.12	0.15 ± 0.29	− 0.18 ± 0.29	− 0.46 ± 0.41	0.46 ± 0.24	0.80 ± 0.25	0.70 ± 0.22
TGC_COMP	0.80	0.80	0.07	0.22 ± 0.06	0.70 ± 0.17	0.73 ± 0.26	0.55 ± 0.15	0.18 ± 0.22	0.19 ± 0.23
WG	0.63	0.85	−0.02	0.64	0.27 ± 0.08	0.75 ± 0.14	0.62 ± 0.13	−0.07 ± 0.24	−0.14 ± 0.22
TGC_FI	0.26	0.54	−0.03	0.41	0.88	0.10 ± 0.06	0.25 ± 0.26	−0.29 ± 0.28	−0.30 ± 0.25
FI	0.6	0.69	0.05	0.52	0.67	0.53	0.45 ± 0.09	0.67 ± 0.15	0.63 ± 0.12
Feed efficiency traits
FCR	−0.11	− 0.25	0.09	− 0.19	−0.46	− 0.55	0.26	0.32 ± 0.11	0.97 ± 0.03
RFI	− 0.17	−0.18	0.09	−0.18	− 0.22	−0.19	0.46	0.83	0.50 ± 0.10

Bold indicates that the estimate significantly differs from zero
ne Non estimable due to a non-convergence of the estimation model
¹BWi and BWf: BW at the beginning and at the end of the FI period, respectively; TGCLOSS Loss of weight during the fasting period estimated as thermal growth coefficient during the fasting period, TGCCOMP Gain of weight during the feeding period estimated as the thermal growth coefficient during the refeeding period, BWG Body weight gain during the FI period, TGC_FI Thermal growth coefficient during the FI period, FI Feed intake, FCR Feed conversion ratio, RFI Residual feed intake

ISSN: 2730-6844