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

Hereditas

Table 6 Heart characteristics from the replicate floor trials

Item	n	RV (g)	TV (g)	RV:TV
Main effect of trial
Floor1	95	2.306	10.31	0.225^a
Floor2	100	2.270	10.43	0.217^b
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	2.589^a	11.85^a	0.219
Female	97	1.986^b	8.87^b	0.223
SEM		0.044	0.14	0.003
Trial × Line
Floor1 × MAS	48	2.354^a	10.41	0.230^a
Floor1 × REL	47	2.259^a	10.20	0.220^ab
Floor2 × MAS	50	2.218^a	10.40	0.210^a
Floor2 × REL	50	2.323^a	10.46	0.224^ab
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

Abbreviations: Floor1 Floor cohort 1, Floor2 Floor cohort 2, MAS marker-assisted selection line, REL Relaxed (control) line, RV right ventricle, TV total ventricle
Item values with different superscript letters in a column indicates significant difference (p < 0.05) in that trait or effect

ISSN: 1601-5223