Accuracy of genomic predictions in Bos indicus (Nellore) cattle

Table 1 Summary statistics related to the estimated breeding values (EBV) of Bos indicus (Nellore) bulls included in training and testing sets for 15 traits under forward prediction ¹

Trait²	h²	Training set			Testing set
Trait²	h²	N³	Mean EBV (SD)⁴	Mean accuracy (SD)⁵	N³	Mean EBV (SD)⁴	Mean accuracy (SD)⁵
WG	0.26	494	1.60 (5.57)	0.86 (0.12)	187	4.11 (5.17)	0.80 (0.11)
Cw	0.25	472	0.10 (0.31)	0.85 (0.12)	185	0.19 (0.35)	0.79 (0.12)
Pw	0.25	472	-0.03 (0.42)	0.85 (0.12)	184	0.21 (0.42)	0.79 (0.12)
Mw	0.26	473	-0.02 (0.40)	0.85 (0.12)	185	0.20 (0.41)	0.80 (0.11)
Nw	0.27	468	0.02 (0.27)	0.85 (0.12)	188	0.06 (0.23)	0.80 (0.11)
PWG	0.33	473	0.66 (7.58)	0.85 (0.12)	115	2.83 (7.65)	0.81 (0.10)
Cy	0.31	454	0.13 (0.36)	0.84 (0.13)	118	0.29 (0.40)	0.80 (0.11)
Py	0.31	455	-0.06 (0.55)	0.83 (0.13)	117	0.24 (0.53)	0.80 (0.11)
My	0.30	448	-0.05 (0.51)	0.84 (0.12)	121	0.25 (0.50)	0.79 (0.11)
Ny	0.30	443	0.03 (0.30)	0.84 (0.13)	122	0.07 (0.26)	0.79 (0.11)
SCaw	0.40	446	-0.22 (1.21)	0.81 (0.14)	115	-0.15 (1.15)	0.75 (0.12)
BW	0.37	457	0.40 (1.35)	0.86 (0.11)	189	0.15 (1.25)	0.83(0.11)
GL	0.49	307	0.17 (3.25)	0.88 (0.10)	138	-0.77 (4.04)	0.88 (0.10)
WI	-	479	2.74 (13.03)	0.85 (0.12)	185	9.83 (13.10)	0.80 (0.11)
FI	-	465	0.86 (12.13)	0.84 (0.12)	130	8.17 (11.94)	0.77 (0.13)

¹Training set composed of bulls with accurate EBV in 2007 and testing set composed of remaining bulls with accurate EBV in 2011 but not in 2007; the summary statistics were obtained considering the EBV obtained in either 2007 (training set) or 2011 (testing set); EBV were obtained with BLUP animal models; ²WG = weight gain from birth to weaning (about 205 days of age); Cw, Pw, Mw, Nw = visual scores recorded at weaning for carcass conformation, carcass finishing precocity, muscling and navel, respectively; PWG = weight gain from weaning to yearling (at 550 days of age); Cy, Py, My, Ny = visual scores recorded at yearling for carcass conformation, carcass finishing precocity, muscling and navel, respectively; SCaw = scrotal circumference adjusted for age and weight; BW = birth weight; GL = gestation length; WI = weaning index, composed of traits evaluated at weaning; FI = final index, composed of traits evaluated at weaning and yearling (FI) [See Additional file 1 for more details]; ³ N = sample size; ⁴Mean EBV(SD) = average (standard deviation) of estimated breeding values (EBV); ⁵Mean accuracy (SD) = average (standard deviation) of EBVs’ accuracies.

ISSN: 1297-9686