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Table 6 Heart characteristics from the replicate floor trials

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

Item n RV (g) TV (g) RV:TV
Main effect of trial
 Floor1 95 2.306 10.31 0.225a
 Floor2 100 2.270 10.43 0.217b
 SEM   0.056 0.22 0.003
Main effect of genetic line
 MAS 98 2.284 10.40 0.220
 REL 97 2.292 10.34 0.222
 SEM   0.059 0.22 0.003
Main effect of sex
 Male 98 2.589a 11.85a 0.219
 Female 97 1.986b 8.87b 0.223
 SEM   0.044 0.14 0.003
Trial × Line
 Floor1 × MAS 48 2.354a 10.41 0.230a
 Floor1 × REL 47 2.259a 10.20 0.220ab
 Floor2 × MAS 50 2.218a 10.40 0.210a
 Floor2 × REL 50 2.323a 10.46 0.224ab
 SEM   0.091 0.36 0.005
Trial × Sex
 Floor1 × Male 48 2.618 11.96 0.221
 Floor1 × Female 47 1.995 8.64 0.230
 Floor2 × Male 50 2.562 11.76 0.218
 Floor2 × Female 50 1.979 9.09 0.216
 SEM   0.066 0.21 0.004
Line × Sex
 MAS × Male 48 2.609 12.04 0.218
 MAS × Female 50 1.978 8.83 0.221
 REL × Male 50 2.571 11.68 0.220
 REL × Female 47 1.995 8.91 0.224
 SEM   0.075 0.24 0.005
P-values
 Trial   0.538 0.499 0.049
 Genetic Line   0.802 0.712 0.517
 Sex   < 0.001 < 0.001 0.481
 Trial × Line   0.046 0.489 0.005
 Trial × Sex   0.691 0.078 0.192
 Line × Sex   0.630 0.237 0.862
 Trial × Line × Sex   0.907 0.154 0.075
  1. Abbreviations: Floor1 Floor cohort 1, Floor2 Floor cohort 2, MAS marker-assisted selection line, REL Relaxed (control) line, RV right ventricle, TV total ventricle
  2. Item values with different superscript letters in a column indicates significant difference (p < 0.05) in that trait or effect