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Table 7 Potential genetic gain as estimated empirically from a 5% selection intensity made within families using EBVs (based on pedigree information) and GEBV (based on all SNPs [ m = 6,932]), and expected gain per time unit under the assumption that with use of markers and somatic embryogenesis, the breeding cycle could be reduced from 30 to 10 years by avoiding the 20-year field test and production phases

From: Genomic selection accuracies within and between environments and small breeding groups in white spruce

  

Empirical genetic gain

Subpopulation*

Trait†

EBVCV1

GEBVCV1

EBVCV1/yra

GEBVCV1/yrb

Ratio GEBVCV1/yr/EBVCV1/yr (%)

BG1

ADEN

27.79

24.31

0.93

2.43

262

 

AMFA

−1.61

−1.31

0.05

0.13

245

 

HT17

44.51

37.26

1.48

3.73

251

 

DBH17

4.15

3.29

0.14

0.33

237

S1

ADEN

25.23

21.82

0.84

2.18

259

 

AMFA

−1.72

−1.51

0.06

0.15

263

 

HT17

43.43

38.36

1.45

3.84

265

 

DBH17

9.27

8.70

0.31

0.87

282

  1. *BG1: both training and testing sets from breeding group 1; S1: both training and testing sets from site 1.
  2. †ADEN: average wood density; AMFA: average microfibril angle; HT17: 17-year height; DBH17: 17-year diameter at breast height.
  3. aEBVCV1/TC, where TC =30, and TC is the number of years to complete a breeding cycle with conventional breeding methods.
  4. bGEBVCV1/TE, where TE =10, and TE is the number of years to complete a breeding cycle with genomic selection and somatic embryogenesis to propagate the superior selected material.