Genetic analysis of geometric morphometric 3D visuals of French jumping horses

Table 2 Heritability estimates for the ten summarized shapes and centroid size and of their phenotypic and genetic correlations with annual competition performance

Summarized shape	Heritability of shape^a	Genetic correlation^a	Phenotypic correlation^a
1	0.35 (0.07)	0.01 (0.07)	0.01 (0.02)
2	0.43 (0.07)	0.12 (0.07)	0.02 (0.02)
3	0.14 (0.05)	− 0.08 (0.10)	0.00 (0.02)
4	0.26 (0.06)	− 0.08 (0.08)	0.01 (0.02)
5	0.34 (0.07)	0.01 (0.07)	− 0.04 (0.02)
6	0.40 (0.07)	0.05 (0.07)	0.00 (0.02)
7	0.34 (0.06)	− 0.04 (0.07)	0.00 (0.02)
8	0.18 (0.06)	0.08 (0.10)	0.04 (0.02)
9	0.28 (0.07)	0.10 (0.08)	− 0.02 (0.02)
10	0.17 (0.06)	0.04 (0.10)	− 0.04 (0.02)
Centroid size	0.25 (0.07)	0.33 (0.08)	0.06 (0.02)

For competition performance: h² = 0.31; repeatability = 0.51, N = 150,817
Summarized shapes were defined by linear combination of 63 Procrustes coordinates using coefficients of the first ten eigenvectors of the genetic variance–covariance matrix of the coordinates. Procrustes coordinates and centroid size were obtained by morphometric analysis of major anatomical references from 3D views of the horse. Genetic variance–covariance matrix was estimated by pooling bivariate estimates from a sample of 2089 horses
^aStandard error in brackets

ISSN: 1297-9686