. 2020 Jul 23;21:509. doi: 10.1186/s12864-020-06884-5

Table 1.

Traits of investigated cockerels used in RNA sequencing and qPCR analyses

Trait	ROSS308
	3-week-old		6-week-old
	LGR (n = 9)	HGR (n = 9)	LGR (n = 9)	HGR (n = 9)
	Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD
BW in first day (g)^a	45.1 ± 1.72	45.4 ± 1.64	44.9 ± 1.14	45.2 ± 2.04
BW in 2nd week (g)	486.67 ± 10.0^A	547.0 ± 14.94^B	484.0 ± 11.74^A	545.6 ± 11.30^B
Slaughter BW (g)	1120.0 ± 14.14^A	1296.0 ± 20.66^B	3222.0 ± 75.10^A	3906.7 ± 95.92^B
Average daily gain (g)^a	51.19 ± 0.69^A	59.55 ± 0.92^B	72.21 ± 1.71^A	87.76 ± 2.18^B
Average daily gain from 2nd week (g)	79.17 ± 2.34^A	93.17 ± 2.39^B	88.32 ± 2.58^A	108.42 ± 3.23^B
Breast muscles (g)	200.18 ± 11.27^A	243.74 ± 11.94^B	786.45 ± 66.92^A	955.40 ± 46.44^B
Leg muscles (g)	174.05 ± 8.97^A	204.33 ± 11.52^B	538.98 ± 51.59^A	657.69 ± 42.71^B
Abdominal fat (g)	8.42 ± 2.63	9.77 ± 2.34	26.59 ± 10.21	34.11 ± 6.33
Feed intake (g)	634.8 ± 18.64^A	689.8 ± 15.75^B	4575.6 ± 187.24^A	5036.8 ± 106.28^B
Feed Conversion Ratio (FCR)	1.0 ± 0.03^A	0.92 ± 0.02^B	1.67 ± 0.07^A	1.5 ± 0.03^B

A, B Values in rows with different letters show significant results (P ≤ 0.01). The statistical analysis between high and low growth rate chickens was estimated (using Student’s t-test) separately for 3rd and 6th-week old chickens. LGR Low growth rate; HGR High growth rate; BW Body weight; Feed intake – from 2nd week of age to the slaughter; FCR Measured based on feed intake and body weight gain from 2nd week of age to the slaughter; ^a-from hatching