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Table 4 Effect of sire:dam mating ratio on genetic gains, rates of inbreeding and accuracy of selection with fewer tested sibs

From: Mating structures for genomic selection breeding programs in aquaculture

Sire:dam mating ratio

G a CAND-TRAIT (σg)

G a SIB-TRAIT (σg)

% SIBTRAIT

∆F b

Acc c

TRAD-EBV

 1:1

0.41

0.11

21

0.015

0.461

 2:2

0.40

0.14

26

0.015

0.471

 1:2

0.40

0.11

22

0.011

0.463

 10:10

0.41

0.17

29

0.11

0.472

GW-EBV

 1:1

0.44

0.31

41

0.008

0.694

 2:2

0.44

0.32

42

0.007

0.689

 1:2

0.44

0.30

41

0.006

0.682

 10:10

0.44

0.32

42

0.005

0.672

  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 a sib test using fewer individuals, Ntest = 1000; 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; Heritability for SIB-TRAIT = 0.25; Ncand = 6000
  2. aStandard errors between 0.0002 and 0.0006
  3. bStandard errors between 0.000000 and 0.000006
  4. cStandard errors between 0.0001 and 0.0004
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Genetics Selection Evolution

ISSN: 1297-9686