Detection of QTL controlling digestive efficiency and anatomy of the digestive tract in chicken fed a wheat-based diet

Table 5 QTL detected for anatomy of the digestive tract

Chromosome	Trait¹	Position (cM)	CI²	LRT value³	Level of significance		QTL effect⁴(NF⁵)
Chromosome	Trait¹	Position (cM)	CI²	LRT value³	Chromosome-wide	Genome-wide	QTL effect⁴(NF⁵)
1	BW23	463	455-465	31.05	0.007	0.034	0.25 (4)
1	RPGW	456	453-462	29.63	0.019	0.093	0.20 (4)
6	RPW	84	74-87	20.63	0.048	>0.20	0.23 (3)
8	RIL	3	0-6	20.74	0.025	>0.20	0.20 (4)
8	RGW	44	35-49	19.46	0.045	>0.20	0.14 (4)
11	PG/I	17	13-21	19.98	0.034	>0.20	0.20 (4)
12	ID	44	43-45	20.79	0.039	>0.20	0.22 (3)
16	RIL	0⁶	-	15.64	0.030	>0.20	0.25 (2)
18	RIL	45	38-51	20.11	0.035	>0.20	0.19 (5)
21	PG/I	27	13-34	19.60	0.047	>0.20	0.20 (4)
21	RPGW	27	14-33	20.12	0.040	>0.20	0.22 (4)
26	BW23	25	21-26	26.83	0.0005	0.106	0.31 (2)
26	RIL	37	34-40	23.09	0.010	>0.20	0.27 (2)

¹RGW: relative gizzard weight to body weight at 23 days of age; RPW: relative proventriculus weight to body weight at 23 days of age; RIL: relative intestine length to body weight at 23 days of age; RPGW: relative gizzard weight and proventriculus weight to body weight at 23 days of age; ID: intestinal density; PG/I: ratio of gizzard and proventriculus weights to intestine weight at 23 days of age; BW23: body weight at 23 days of age; ²1-LOD-drop off confidence interval (lower and upper boundaries, in cM); ³Likelihood Ratio Test value; ⁴QTL effect as a proportion of the phenotypic standard deviation of trait; ⁵number of F1 sire families heterozygous for the QTL (P < 0.05, Student test); ⁶QTL located at the telomere.

ISSN: 1297-9686