Genome-wide interval mapping using SNPs identifies new QTL for growth, body composition and several physiological variables in an F2 intercross between fat and lean chicken lines

Table 1 Descriptive statistics and heritabilities ( h ² ) of recorded traits

Trait	Males			Females			All
Trait	N	Mean	STD	N	Mean	STD	Mean	STD	h ²
BW1	274	97.67	14.18	290	94.15	13.39	95.86	13.87	0.32 ± 0.03
BW3	271	460.7	54.29	296	413.36	50.08	435.99	57.21	0.36 ± 0.03
BW5	272	1069.38	109.79	296	907.29	99.43	984.91	132.18	0.41 ± 0.04
BW7	266	1690.7	177.42	296	1380.42	139.27	1527.28	221.61	0.32 ± 0.02
BW9	276	2507.05	262.84	298	1979.05	201.42	2232.93	351.99	0.22 ± 0.02
AFW	273	71.93	21.73	292	73.97	22.17	72.98	21.96	0.61 ± 0.15
AFP	274	2.85	0.76	292	3.7	0.93	3.29	0.95	0.63 ± 0.05
BMWmaj	273	110.62	13.58	292	89.15	10.13	99.53	16.03	0.47 ± 0.05
BMWmin	274	37.87	4.57	292	31.37	3.36	34.52	5.15	0.40 ± 0.06
BMP	273	11.82	0.86	290	12.17	0.94	12.02	0.91	0.59 ± 0.05
ThW	273	301.92	36.23	291	229.38	25.73	264.49	47.87	0.33 ± 0.03
ThP	278	24.04	1.19	291	23.13	1.08	23.58	1.22	0.37 ± 0.04
ShD	268	12.59	0.79	297	10.92	0.59	11.72	1.08	0.45 ± 0.03
ShL	275	123.38	5.92	296	108.37	4.61	115.60	9.17	0.44 ± 0.03
T _b	272	41.85	0.27	293	41.88	0.25	41.87	0.26	0.31 ± 0.08
Glucose	274	196.7	11.78	295	196.28	11.04	196.48	11.40	0.19 ± 0.08
NEFA	261	0.488	0.098	269	0.496	0.099	0.49	0.10	0.16 ± 0.06
IGF-I	272	38.01	8.36	295	38.4	8.93	38.22	8.65	0.38 ± 0.11

BW1, 3, 5, 7, 9 body weight at age 1, 3, 5, 7 and 9 weeks (g), AFW and AFP abdominal fat weight (g) and percentage (%), BMWmin and BMWmaj pectoralis minor and major weights (g), BMP breast muscle percentage (%), ThW and ThP thigh weight (g) and percentage (%), ShD and ShL shank diameter and length (mm), T_b, body temperature (°C), Glucose fasting plasma glucose level (mg/dL), IFG-I and NEFAs fasting plasma IGF-I (pg/10 μl of plasma diluted at 1/7) and non-esterified fatty acid levels (mEq/L); STD are standard deviation of the traits, expressed in trait units.

ISSN: 1297-9686