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Table 3 Effect of sire:dam mating ratio on genetic gains, rates of inbreeding and accuracy of selection with a lower heritability for SIB-TRAIT

From: Mating structures for genomic selection breeding programs in aquaculture

Sire:dam mating ratio

G a CAND-TRAIT (σg)

G a SIB-TRAIT (σg)

% SIB-TRAIT

∆F b

Acc c

TRAD-EBV

 1:1

0.44

0.05

10

0.015

0.525

 2:2

0.45

0.07

13

0.014

0.526

 1:2

0.43

0.04

9

0.010

0.518

 10:10

0.45

0.07

13

0.011

0.514

GW-EBV

 1:1

0.51

0.14

22

0.008

0.744

 2:2

0.51

0.15

23

0.007

0.731

 1:2

0.50

0.15

23

0.005

0.728

 10:10

0.51

0.15

23

0.005

0.715

  1. Genetic gain (G) for CAND-TRAIT and SIB-TRAIT, percentage of total genetic gain that comes from the SIB-TRAIT (% SIB-TRAIT), rates of inbreeding (∆F) and accuracy of the total merit index of the selection candidates (Acc) in Generation10 for schemes with lower heritability of SIB-TRAIT of 0.10; 100 sires and 100 dams were selected for schemes with mating ratios 1:1, 2:2 and 10:10 and 100 sires and 200 dams for schemes with mating ratio 1:2; Ntest = 3000; Ncand = 6000
  2. aStandard errors between 0.0002 and 0.0006
  3. bStandard errors between 0.000000 and 0.000003
  4. cStandard errors between 0.0001 and 0.0002
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Genetics Selection Evolution

ISSN: 1297-9686