Table 1 Genetic variances and correlations between sites for grain yield, plant height, days to anthesis and maturity.

Sites	Celaya	Delicias	Tepatitlán	Cd. Obregón	Zaragoza
Grain yield/Plant height
Celaya	3.43/147	0.899	0.937	0.843	0.859
Delicias	0.514	2.39/70	0.849	0.837	0.930
Tepatitlán	0.735	0.389	2.43/121	0.857	0.827
Cd. Obregón	0.849	0.444	0.697	3.29/93	0.797
Zaragoza	0.832	0.446	0.794	0.829	0.48/123
Days to maturity/Days to anthesis
Celaya	46.5/37.5	0.851	0.875	0.875	0.834
Delicias	0.876	25.6/32.6	0.894	0.949	0.928
Tepatitlán	0.874	0.838	11.7/69.8	0.952	0.898
Cd. Obregón	0.881	0.846	0.846	68.7/74.9	0.921
Zaragoza	0.750	0.729	0.738	0.994	12.4/48.8

For grain yield and plant height the diagonal shows the variance components (./.), the lower diagonal the correlation between sites for grain yield, and the upper diagonal the correlation between sites for plant height. For days to maturity-days to anthesis the diagonal shows the variance components (./.), the lower diagonal the correlation between sites for days to maturity and the upper diagonal the correlation between sites for days to anthesis.

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