Table 1 Phenotypic means and heritabilities (h²)

pH

7.50 ± 0.0^a

.17 (0.08)

7.53 ± 0.003^b

.10 (0.08)

0.03 ± 0.004

.05 (0.03)

pCO₂, mmHg

31.9 ± 0.1^a

.21 (0.06)

31.1 ± 0.2^b

.05 (0.04)

−0.8 ± 0.2

.07 (0.05)

pO₂, mmHg

43.3 ± 0.3^a

.06 (0.04)

43.9 ± 0.2^a

.05 (0.05)

0.5 ± 0.3

.00 (0.03)

BE, mM

1.8 ± 0.1^a

.10 (0.05)

3.3 ± 0.2^b

.02 (0.02)

1.5 ± 0.2

.00 (0.02)

HCO₃, mM

25.0 ± 0.1^a

.05 (0.04)

26.0 ± 0.1^b

.23 (0.12)

1.0 ± 0.2

.03 (0.02)

TCO₂, mM

25.9 ± 0.1^a

.02 (0.03)

26.9 ± 0.1^b

.13 (0.09)

1.0 ± 0.2

.01 (0.01)

K, mM

4.8 ± 0.0^a

.20 (0.01)

4.9 ± 0.0^a

.02 (0.01)

0.1 ± 0.0

.10 (0.06)

Na, mM

137.0 ± 0.2^a

.08 (0.6)

137.2 ± 0.3^a

.01 (0.01)

0.3 ± 0.3

.01 (0.01)

iCa, mM

1.25 ± 0.0^a

.04 (0.01)

1.28 ± 0.01^b

.02 (0.01)

0.02 ± 0.01

.01 (0.01)

Hct, % PCV

22.5 ± 0.2^a

.01 (0.03)

23.2 ± 0.1^b

.21 (0.08)

0.7 ± 0.2

.02 (0.01)

Hb, g/dL

7.7 ± 0.1^a

.07 (0.05)

7.9 ± 0.0^b

.11 (0.04)

0.2 ± 0.1

.02 (0.01)

sO₂, %

83.2 ± 0.2^a

.03 (0.05)

84.7 ± 0.2^b

.02 (0.02)

1.5 ± 0.3

.01 (0.01)

Glu, mg/dl

252 ± 0.8^a

.15 (0.08)

243 ± 1^b

.19 (0.09)

−8 ± 1

.02 (0.02)