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. 2019 Sep 30;9(12):3981–3994. doi: 10.1534/g3.119.400677

Table 6. Simulated data for estimated LPSIa and LGSIb parameters constructed with four traits (T1, T2, T3 and T4) without constraints and true maximum responses for seven selection cycles.

LPSI True maximum
Estimated expected genetic gain per trait Estimated maximum
Cycle T1 T2 T3 T4 Response Response
1 10.42 −5.47 3.78 2.04 17.81 19.63
2 10.11 −4.35 3.68 2.00 15.69 17.56
3 9.91 −4.07 3.32 1.66 14.22 16.49
4 10.94 −4.31 2.57 1.42 14.34 16.32
5 10.60 −3.51 3.04 1.48 13.64 15.99
6 10.02 −3.54 2.53 1.37 12.04 14.69
7 8.77 −3.49 3.14 1.38 11.61 14.90
Mean1c 10.11 −4.11 3.15 1.62 14.19 16.51
Mean2d 2.53 −1.03 0.79 0.41 3.55 4.13
LGSI True maximum
Estimated expected genetic gain per trait Estimated maximum
Cycle T1 T2 T3 T4 Response Response
1 6.60 −3.50 2.70 1.60 14.40 13.26
2 6.30 −3.40 2.60 1.50 13.91 15.28
3 6.10 −3.30 2.70 1.50 13.61 15.37
4 5.60 −3.10 2.30 1.30 12.30 16.05
5 5.20 −2.80 2.10 1.30 11.40 15.17
6 4.90 −2.60 1.90 1.30 10.61 14.49
7 5.20 −2.70 2.10 1.20 11.21 15.82
Mean1c 5.70 −3.10 2.30 1.40 12.49 15.06
Mean3e 3.8 −2.07 1.53 0.93 8.33 10.04
a

Unconstrained Linear Phenotypic Selection Index.

b

Unconstrained Linear Genomic Selection Index.

c

Mean1 is the average of the seven selection cycles.

d

Mean2 = Mean1/ 4 for the LPSI.

e

Mean3 = Mean1/1.5 for the LGSI, where 4 and 1.5 are the intervals between selection cycles (L) for LPSI and LGSI, respectively. Means 2 and 3 denote the average of the genetic gains per year.