Factors affecting the accuracy of genomic selection for growth and wood quality traits in an advanced-breeding population of black spruce (Picea mariana)

Table 1 Variance component estimates from genomic selection analyses, combined-site and single-site analyses. “Pedigree” indicates variance component estimation based on pedigree and phenotypic information, and “Markers” indicate SNP information from all 4,993 SNPs

Trait		Model	σ ² _a ^a	V _A ^b	σ ² _u ^c	σ ² _e ^d	h ² _i ^e
Wood density	Combined sites	Pedigree	-	-	597.73	870.01	0.41
Wood density	Combined sites	Markers	0.29	551.46	-	878.19	0.39
	Site 1	Pedigree	-	-	973.94	1407.01	0.41
	Site 1	Markers	0.50	957.04	-	1398.98	0.41
	Site 2	Pedigree	-	-	653.68	216.32	0.75
	Site 2	Markers	0.27	523.71	-	291.00	0.64
Diameter (DBH)	Combined sites	Pedigree	-	-	126.42	93.69	0.57
Diameter (DBH)	Combined sites	Markers	2.9E -2	55.88	-	135.02	0.29
	Site 1	Pedigree	-	-	123.22	129.34	0.49
	Site 1	Markers	0.04	68.09	-	164.37	0.29
	Site 2	Pedigree	-	-	143.65	54.22	0.73
	Site 2	Markers	0.03	60.26	-	106.18	0.36
Height	Combined sites	Pedigree	-	-	3503.73	1613.54	0.68
Height	Combined sites	Markers	0.97	1851.53	-	2514.81	0.42
	Site 1	Pedigree	-	-	3232.04	1623.81	0.67
	Site 1	Markers	1.14	2182.23	-	2227.79	0.49
	Site 2	Pedigree	-	-	4494.96	1222.76	0.79
	Site 2	Markers	1.32	2530.77	-	2341.31	0.52
Microfibril angle	Combined sites	Pedigree	-	-	0.14	4.8E -2	0.74
Microfibril angle	Combined sites	Markers	3.5E -5	6.7E -2	-	8.8E -2	0.43
	Site 1	Pedigree	-	-	0.15	5.5E -2	0.73
	Site 1	Markers	4.5E -5	8.6E -2	-	9.2E -2	0.48
	Site 2	Pedigree	-	-	0.15	3.1E -2	0.83
	Site 2	Markers	4.3E -5	8.2E -2	-	7.2E -2	0.53

^a σ ² _a is the additive genetic variance explained by marker loci
^b V _A is the additive genetic variance based on markers was estimated as \( {V}_A=2{\sigma}_a^2{\displaystyle {\sum}_{i=1}^k}{p}_k{q}_k. \)
^c σ ² _u is the polygenic variance estimated based on pedigree
^d σ ² _e is the residual variance
^e h ²i is the individual trait heritability

ISSN: 1471-2164