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Table 3 Live weight and carcass characteristics from the replicate floor trials

From: SNP-based breeding for broiler resistance to ascites and evaluation of correlated production traits

Item n Live Hot carcass Fat pad Chilled carcass
Weight, kg Weight, kg Yield1, % Weight, kg Yield, % Weight, kg Yield, %
Main effect of trial
 Floor1 453 2814a 1996a 70.94 67.20a 2.402a 2058a 73.13
 Floor2 415 2730b 1941b 71.11 59.53b 2.194b 2002b 73.35
 SEM   19 14 0.07 0.88 0.030 14 0.07
Main effect of genetic line
 MAS 439 2795a 1988a 71.12 64.03 2.307 2050a 73.33
 REL 429 2752b 1951b 70.91 63.00 2.297 2013b 73.14
 SEM   19 14 0.07 0.91 0.031 14 0.07
Main effect of sex
 Male 395 3117a 2223a 71.33a 65.56a 2.104a 2281a 73.22
 Female 473 2488b 1759b 70.75b 61.81b 2.469b 1823b 73.25
 SEM   13 10 0.07 0.91 0.029 10 0.08
Trial × Line
 Floor1 × MAS 233 2826 2010 71.09 67.00 2.385 2072 73.29
 Floor1 × REL 220 2803 1983 70.77 67.42 2.420 2045 72.97
 Floor2 × MAS 206 2761 1964 71.15 60.67 2.218 2025 73.38
 Floor2 × REL 209 2699 1918 71.06 58.41 2.170 1979 73.33
 SEM   27 20 0.10 1.36 0.045 20 0.11
Trial × Sex
 Floor1 × Male 204 3174a 2264a 71.29 70.71a 2.236 2322a 73.13
 Floor1 × Female 249 2513c 1773c 70.65 64.31b 2.540 1838c 73.14
 Floor2 × Male 191 3055b 2180b 71.38 60.07c 1.962 2238b 73.32
 Floor2 × Female 224 2460c 1743c 70.87 59.08bc 2.391 1806c 73.38
 SEM   19 15 0.10 1.29 0.042 15 0.11
Line × Sex
 MAS × Male 209 3147a 2248a 71.42 66.98 2.128 2306a 73.30
 MAS × Female 230 2476c 1753c 70.84 61.33 2.469 1818c 73.36
 REL × Male 186 3085b 2197b 71.23 63.95 2.076 2255b 73.13
 REL × Female 243 2498c 1764c 70.67 62.27 2.468 1827c 73.15
 SEM   21 16 0.10 1.38 0.042 16 0.11
Trial × Line × Sex
 Floor1 x MAS x Male 114      2.201cd   
 Floor1 x MAS x Female 118      2.564a   
 Floor1 x REL x Male 90      2.281bcd   
 Floor1 x REL x Female 127      2.518ab   
 Floor2 x MAS x Male 95      2.042de   
 Floor2 x MAS x Female 111      2.369abc   
 Floor2 x REL x Male 96      1.883e   
 Floor2 x REL x Female 113      2.413abc   
 SEM       0.062   
P-values
 Trial   < 0.001 < 0.001 0.078 < 0.001 < 0.001 < 0.001 0.270
 Genetic line   0.008 0.003 0.054 0.313 0.618 0.003 0.069
 Sex   < 0.001 < 0.001 < 0.001 0.002 < 0.001 < 0.001 0.640
 Trial × Line   0.235 0.432 0.293 0.274 0.349 0.468 0.174
 Trial × Sex   0.035 0.028 0.514 0.019 0.108 0.036 0.909
 Line × Sex   0.011 0.012 0.942 0.200 0.628 0.019 0.915
 Trial × Line × Sex   0.980 0.992 0.637 0.093 0.039 0.963 0.889
  1. Abbreviations: Floor1 Floor cohort 1, Floor2 Floor cohort 2, MAS marker-assisted selection line, REL Relaxed (control) line
  2. 1: Yields calculated based on back-dock live weight
  3. Item values with different superscript letters in a column indicate significant difference (p < 0.05) in that trait or effect