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Table 1 Phenotypic means and heritabilities (h2)

From: Identification of quantitative trait loci for body temperature, body weight, breast yield, and digestibility in an advanced intercross line of chickens under heat stress

Trait

Mean ± SEM (range)

h2 (SE)

BT20

42.3 ± 0.01 (41.5–42.9)

0.11 (0.06)

BT22

42.4 ± 0.02 (41.2–43.2)

0.10 (0.06)

BT22-20

0.1 ± 0.02 (−1.4 to 1.5)

0.03 (0.04)

BT28

42.3 ± 0.01 (41.4–43.1)

0.10 (0.06)

BT28-20

−0.02 ± 0.02 (−1.1 to 1.3)

0.03 (0.04)

BW21

253.6 ± 1.58 (157.6–352.0)

0.24 (0.17)

BW28

402.6 ± 2.58 (238.7–555.3)

0.35 (0.11)

BW28-21

149.2 ± 1.57 (48.1–203.3)

0.15 (0.11)

Digestibility

90.6 ± 0.98 (86.2–95.8)

0.33 (0.14)

Percent breast weight

8.81 ± 0.03 (5.1–12.6)

0.15 (0.08)

  1. Body temperature (BT) measured on days 20, 22, 28, and the differential 28-20; body weight (BW) measured on days 21, 28, and the differential 28-21; digestibility, measured from ileal content, on day 28; percent of breast weight, calculated from percent of total body weight, and measured on day 28
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Genetics Selection Evolution

ISSN: 1297-9686