Genetic analysis of an F2 intercross between two chicken lines divergently selected for body-weight

BMC Genomics

Table 1 Phenotypic traits analyzed in the F₂ intercross.

Trait¹	n	Mean ± SD	Range²
Body-weight (g)
14 days	874	75.2 ± 14.9	38 – 144
28 days	871	179.1 ± 56.8	53 – 385
42 days	809	365.5 ± 113.1	76 – 729
56 days	795	621.6 ± 186.9	134 – 1179
70 days	789	943.3 ± 262.1	182 – 1627
Growth (g)
0–14 days	874	47.4 ± 14.7	12 – 116
14–28 days	871	103.8 ± 47.3	-10 – 241
28–42 days	809	179.5 ± 68.1	0 – 372
42–56 days	794	251.7 ± 88.6	-103 – 466
56–70 days	788	320.7 ± 94.9	-82 – 778

Sex-average mean, standard deviation (SD), number of individuals (n) and the phenotypic range are given for each analyzed body-weight and growth trait.
¹Body-weight was measured at six different ages starting from hatch to 70 days. Growth traits were calculated as the differences between body-weights at the two weeks interval.
²Negative values for growth traits occur because some individuals lost weight during a two-week interval.

ISSN: 1471-2164