Zoometric measures and their utilization in prediction of live weight of local goats in southern México

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Table 5 Multiple linear regression (stepwise) of live weight on original (model 1) and orthogonal (model 2) variables of local goats in Amatepec and Tejupilco, state of Mexico

(1) Original variables as predictors					(2) Orthogonal variables as predictors
Variables	β₁	SE	α	R²	PC	β ^*₁	SE	α	R²
Amatepec
BL	0.08	0.05	0.14	0.82	PC₁	0.37	0.02	0.00	0.74
TL	0.18	0.07	0.01		PC₂	−0.28	0.04	0.00
WH	0.06	0.08	0.46		PC₃	−0.06	0.05	0.18
HG	0.73	0.06	0.00		PC₄	−0.08	0.05	0.10
RW	0.39	0.19	0.04		PC₅	0.01	0.06	0.86
RL	0.08	0.17	0.64		PC₆	−0.13	0.07	0.06
HL	−0.11	0.14	0.43		PC₇	0.40	0.07	0.00
HW	0.94	0.36	0.01		PC₈	0.22	0.08	0.00
EL	−0.06	0.13	0.67		PC₉	−0.02	0.08	0.78
β₀	−49.87				γ₀	0.00
Tejupilco
BL	0.34	0.06	0.00	0.76	PC₁	0.34	0.02	0.00	0.76
TL	0.09	0.11	0.42		PC₂	0.01	0.05	0.90
WH	0.17	0.13	0.18		PC₃	0.02	0.06	0.73
HG	0.46	0.09	0.00		PC₄	−0.04	0.06	0.51
RW	−0.22	0.32	0.50		PC₅	−0.19	0.07	0.00
RL	0.25	0.17	0.14		PC₆	−0.13	0.08	0.09
HL	0.17	0.25	0.49		PC₇	−0.04	0.06	0.62
HW	0.79	0.38	0.04		PC₈	0.05	0.09	0.58
EL	0.43	0.15	0.01		PC₉	0.23	0.10	0.03
β₀*	−54.15				γ₀*	0.00

BL body length, TL trunk length, WH withers height, HG hearth girth, RW rump width, RL rump length, HL head length, HW head width, EL ear length, PC principal component, SE standard error, α probability value, R ² coefficient of determination