Skip to main content

Table 2 Method of accumulating changes in traits for assessing the effects of selection on emissions from the beef cattle production system

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

Breeding objective traits (Ti)

Change in trait (∆T)

Associated change in feed intake (MJ)

Associated change in GHG emission (g)a

Young animal pasture (∆PF)b

Young animal feedlot (∆FF)c

Cow pasture (∆CF)d

Young animal pasture (∆PG)

Young animal feedlot (∆FG)

Cow pasture (∆CG)

T1

∆T1

∆PF1

∆FF1

∆CF1

∆PG1

∆FG1

∆CG1

T2

∆T2

∆PF2

∆FF2

∆CF2

∆PG2

∆FG2

∆CG2

Tn

∆Tn

∆PFn

∆FFn

∆CFn

∆PGn

∆FGn

∆CGn

Total

 

Σ(∆PFi)

Σ(∆FFi)

Σ(∆CFi)

Σ(∆PGi)

Σ(∆FGi)

Σ(∆CGi)

  1. aEmissions associated with feed intake over 12 months (in this paper, calculated with and without an association between RFI traits and GHG emission)
  2. bFeed requirement and RFI change at pasture; restricted to the period of limited feed
  3. cFeed requirement and RFI change over the feedlot period
  4. dFeed requirement change over 12 months, including feed requirement for cows to be in joining condition; restricted to the period of limited feed