View Full Table | Close Full ViewTable 1.

Descriptive statistics for pulmonary arterial pressure and weight traits in the CSU-BIC Angus herd1

 
Item2 n Minimum Mean Maximum SD
PAP, mmHg 5,776 21.0 42.4 139.0 9.9
BWT, kg 8,695 12.2 36.2 56.7 5.1
WW, kg 8,010 58.5 213.5 368.3 31.8
YW, kg 5,580 166.9 345.6 584.2 83.8
PWG, kg 5,449 11.7 122.0 382.9 63.7
1CSU-BIC = Colorado State University Beef Improvement Center, Saratoga, WY, elevation 2,150 to 2,411 m.
2PAP = mean pulmonary arterial pressure; BWT = birth weight; WW = weaning weight; YW = yearling weight. PWG = postweaning gain = [(YW − WW)/days between weights] × 160.



View Full Table | Close Full ViewTable 2.

Fixed and random effects included in the 4-trait animal models analyzed for each trait in the CSU-BIC Angus herd data1

 
Model
Effect Birth Weight Weaning Weight Yearling Weight Postweaning Gain PAP2
Fixed
    Year of birth X
    Sex3 X X X X X
    Age of Dam X X X
    Age4 X X X
    Date5 X
    Weaning CG6 X
    Yearling CG7 X X X
Random
    Direct additive X X X X X
    Maternal additive X X X
    Permanent environment X X X
1CSU-BIC = Colorado State University Beef Improvement Center, Saratoga, WY, elevation of 2,150 to 2,411 m; average observations of n = 6,702.
2Mean pulmonary arterial pressure, mm Hg.
3Preweaning traits females (1) and males (2); postweaning traits heifers (1) and bulls (2), excluding steers because of limited PAP measures.
4Age of animals when phenotypic observation was measured.
5Date when phenotypic observation was measured on the animals.
6Weaning contemporary group (CG) = weaning date.
7Yearling contemporary group (CG) = yearling date and weaning date.



View Full Table | Close Full ViewTable 3.

Heritabilities (diagonal), genetic correlations (above diagonal), and environmental correlations (below diagonal) ± SE from the 4-trait model for mean pulmonary arterial pressure, birth weight (direct and maternal), weaning weight (direct and maternal), and yearling weight (direct and maternal) in the CSU-BIC herd1

 
Trait2 PAP BWTd BWTm WWd WWm YWd YWm
PAP 0.26 ± 0.03 0.15 ± 0.09 0.14 ± 0.10 0.22 ± 0.08 −0.03 ± 0.08 0.12 ± 0.08 0.00 ± 0.09
BWTd −0.02 ± 0.03 0.42 ± 0.04 −0.06 ± 0.10 0.23 ± 0.07 −0.15 ± 0.08 0.16 ± 0.08 −0.07 ± 0.08
BWTm 0.13 ± 0.02 0.23 ± 0.10 0.15 ± 0.09 0.30 ± 0.10 0.10 ± 0.09
WWd -0.03 ± 0.03 0.26 ± 0.04 0.38 ± 0.04 −0.51 ± 0.06 0.92 ± 0.08 −0.65 ± 0.05
WWm 0.28 ± 0.03 −0.43 ± 0.06 0.96 ± 0.02
YWd −0.03 ± 0.03 0.23 ± 0.04 0.68 ± 0.02 0.45 ± 0.04 −0.61 ± 0.05
YWm 0.23 ± 0.03
1CSU-BIC = Colorado State University Beef Improvement Center, Saratoga, WY, elevation of 2,150 to 2,411 m; 1993 to 2014; average observations of n = 6,702.
2PAP = mean pulmonary arterial pressure; BWT = birth weight; WW = weaning weight; YW = yearling weight. Subscript d indicates additive direct. Subscript m indicates additive maternal.



View Full Table | Close Full ViewTable 4.

Heritability estimates (diagonal), genetic correlations (above diagonal), and environmental correlations (below diagonal) ± SE from the 4-trait model for mean pulmonary arterial pressure, birth weight (direct and maternal), weaning weight (direct and maternal), and postweaning gain in the CSU-BIC herd1

 
Trait2 PAP BWTd BWTm WWd WWm PWG
PAP 0.26 ± 0.03 0.15 ± 0.09 0.14 ± 0.10 0.23 ± 0.09 −0.01 ± 0.10 −0.10 ± 0.10
BWTd −0.02 ± 0.03 0.42 ± 0.04 −0.06 ± 0.10 0.35 ± 0.08 −0.20 ± 0.09 0.18 ± 0.10
BWTm 0.14 ± 0.02 0.24 ± 0.11 0.20 ± 0.10 0.24 ± 0.11
WWd -0.03 ± 0.03 0.24 ± 0.03 0.29 ± 0.04 −0.49 ± 0.08 0.26 ± 0.11
WWm 0.19 ± 0.03 −0.13 ± 0.11
PWG −0.02 ± 0.02 0.06 ± 0.03 -0.02 ± 0.03 0.14 ± 0.02
1CSU-BIC = Colorado State University-Beef Improvement Center, Saratoga, WY, elevation of 2,150 to 2,411 m; 1993 to 2014; average observations of n = 6,702.
2PAP = mean pulmonary arterial pressure; BWT = birth weight; WW = weaning weight; PWG = postweaning gain. Subscript d indicates additive direct. Subscript m indicates additive maternal.