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Table 4 Bias of approximate TMI methods relative to TMI from multivariate analysis within TMI reliability groups for scenarios 0 and 2

From: A comparison of methods to calculate a total merit index using stochastic simulation

Scenario

Reliability

YD

DRP

SI

0

<39

0.1

0.0

1.0

 

40-49

0.1

0.0

1.3

 

50-59

0.1

0.0

−0.5

 

60-69

0.1

0.0

−0.6

 

70-79

−0.1

0.0

−1.6

 

80-89

0.0

0.0

−2.3

 

>90

0.0

0.0

−2.5

2

<39

0.1

0.0

0.2

 

40-49

0.1

0.0

0.7

 

50-59

0.1

0.0

−1.1

 

60-69

0.1

0.0

−1.4

 

70-79

−0.1

0.0

−1.6

 

80-89

0.0

0.0

−2.6

 

>90

0.0

0.0

−2.8

  1. YD = approximate multitrait two-step procedure based on yield deviations; DRP = approximated multitrait two-step procedure based on de-regressed estimated breeding values; SI = selection index method.