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Table 4 Accumulated changes in traits for the example beef cattle production system in Table 1

From: Methods and consequences of including reduction in greenhouse gas emission in beef cattle multiple-trait selection

Breeding objective traits

Change in traits

Associated feed intake, MJa

Associated C02-e, kgb

Young animal pasture

Young animal feedlot

Cow pasture

Young animal pasture

Young animal feedlot

Cow pasture

Weaning live weight-direct, kg

− 0.194

1.4

0

0.06

0.58

0

0.07

Weaning live weight-maternal, kg

− 0.866

0

0

− 70

0

0

− 5

RFI-pasture, kg/d

− 0.098

− 116

0

0

− 7

0

− 1.8

RFI-pasture surplus, kg/d

− 0.100

0

0

0

− 1.3

0

− 0.31

Entry live weight, kg

− 0.580

− 21

18

− 4

− 6

1.3

− 0.85

RFI-feedlot, kg/d

− 0.11

0

− 110

0

0

− 4

0

Sale live weight, kg

− 4.63

0

− 195

0

0

− 14

− 2

Dressing %

0.05

0

0

0

0

0

0

Carcass meat %

0.34

0

0

0

0

0

0

Carcass fat depth, mm

0.09

0

0

0

0

0

0

Carcass marbling scorec

0.02

0

0

0

0

0

0

Cow live weight, kg

− 12.14

0

0

− 882

0

0

− 60

Cow condition scored

0

0

0

0

0

0

0

Calving ease-direct, %

1.06

0

0

0

0

0

0

Calving ease-maternal, %

0.18

0

0

0

0

0

0

Cow weaning %

1.14

267

232

87

33

17

0.64

Total

 

131

− 55

− 870

19

− 0.37

− 70

  1. Characteristics of the production system are in Table 1
  2. Methods for accumulating changes in traits are in Table 2
  3. aAccumulated over the limited feed period
  4. bAccumulated over 12 months; RFI traits are assumed to have associated GHG emissions
  5. cScored on a 12-point scale from 1 (least) to 12 (most) [22]
  6. dScored on a 15-point scale from 1- (emaciated) to 5 + (obese)