Genetic loci inherited from hens lacking maternal behaviour both inhibit and paradoxically promote this behaviour

Table 3 Additive and dominance effects for incubation status and early incubation behaviour in the WL × SLK F2 cross

Chromosome	Position (cM)	Additive ±SE	Dominance ±SE	Standardized additive effect^a	Standardized dominance effect^b	Phenotypic variance (%)^c
Incubation status
5	100	0.08 ± 0.01	0.51 ± 0.12	1.77	12.03	8.97
E22C19W28	13	−0.18 ± 0.09	0.46 ± 0.15	−4.06	10.28	7.02
19	1	−0.06 ± 0.01	−0.69 ± 0.20	−1.16	−14.50	6.25
1	70	0.23 ± 0.11	−0.63 ± 0.23	4.98	−13.48	6.29
18	0	−0.24 ± 0.09	0.32 ± 0.14	−5.36	7.23	6.48
Early incubation behaviour
8	18	0.18 ± 0.04	0.10 ± 0.05	7.35	4.21	13.02
26	0	−0.11 ± 0.04	0.11 ± 0.05	−4.49	4.63	7.09
1	66	0.06 ± 0.04	−0.36 ± 0.11	2.45	−15.16	7.36

^aMean additive effect divided by trait standard deviation expressed as percentage
^bMean dominant effect divided by trait standard deviation expressed as percentage
^cCalculated as the proportional decrease in the residual sums of squares resulting from the full model including the QTL compared to the residual sums of squares from the reduced model from which the QTL was omitted expressed as percentage

ISSN: 1297-9686