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Table 2 (Co)-variances, correlations, and likelihood test estimated using the real data per model and sex

From: Estimation and consequences of direct-maternal genetic and environmental covariances in models for genetic evaluation in broilers

 

Moda

Modam

Coram

Corepe

Coramepe

f

m

f

m

f

m

f

m

f

m

\({{{\sigma}}}_{{{a}}}^{2}\)

5967 (267)

9093 (446)

5436 (269)

8179 (442)

6090 (370)

9559 (624)

4469 (282)

7065(447)

4952 (340)

8170 (568)

\({{{\sigma}}}_{{{a}}{{m}}}\)

–555(162)

–1187(273)

–795(178)

–1436(292)

\({{{\sigma}}}_{{{m}}}^{2}\)

550 (86)

818 (133)

698 (109)

121 (193)

657 (94)

956 (144)

1016 (146)

1608 (237)

\({{{\sigma}}}_{{{e}}}^{2}\)

14,259 (143)

23,065 (241)

14,520 (144)

23,519 (239)

14,196 (192)

22,833 (324)

15,011 (152)

24,072 (241)

14,772 (179)

23,523 (297)

\({{{\sigma}}}_{{{e}}{{p}}{{e}}}\)

871(118)

1055(148)

1048(130)

1232(164)

\({{{\sigma}}}_{{{p}}{{e}}}^{2}\)

792 (47)

1380 (81)

473 (57)

931 (96)

553 (61)

1062 (99)

619 (64)

1103 (103)

727 (68)

1254 (107)

\({{{r}}}_{{{a}}{{m}}}\)

–0.27 (0.06)

–0.35 (0.06)

–0.35 (0.06)

–0.40 (0.06)

\({{{r}}}_{{{e}}{{p}}{{e}}}\)

0.29 (0.03)

0.26 (0.03)

0.32 (0.04)

0.29 (0.04)

\({{{h}}}^{2}\)

0.28(0.01)

0.27(0.01)

0.26(0.01)

0.24(0.01)

0.28 (0.01)

0.28 (0.02)

0.22 (0.01)

0.21 (0.01)

0.23 (0.01)

0.24 (0.01)

LRT

214

81

55

36

0

  1. Additive genetic variance (\({\sigma }_{a}^{2}\)), maternal genetic variance (\({\sigma }_{m}^{2}\)), environmental variance (\({\sigma }_{e}^{2}\)), environmental permanent maternal variance (\({\sigma }_{pe}^{2}\)), genetic, environmental covariances and correlations (\({\sigma }_{am}\), \({\sigma }_{epe}\), \({r}_{am}\), \({r}_{epe}\)), heritability (\({h}^{2})\) and likelihood ratio test (LRT) estimated with the real data for the five models relative to the Coramepe model
  2. Moda is the model for which no maternal genetic effects are included and for which the direct-maternal environmental covariance is null. Modam is the model for which both the direct-maternal genetic and the direct-maternal environmental covariance are null. Coram is the model for which the direct-maternal genetic effect is considered as non-null while the direct-maternal environmental covariance is null. Corepe is the model for which the direct-maternal environmental effect is considered as non-null while the direct-maternal genetic covariance is null. Coramepe is the model for which both the direct-maternal genetic and the direct-maternal environmental covariance are non-null
  3. Standard errors of the estimates are in italics between brackets