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Genetic Diversity, Specific Combining Ability, and Heterosis in Tropical Maize under Stress and Nonstress Environments

^a Corn Breeding and Genetics Program, Texas A&M University, College Station, TX 77845
^b International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-641, 06600 México D.F., México
^c Paseo del Atardecer 360, Villas de Irapuato, 36670 Irapuato, México

View larger version (21K): [in a new window]   Fig. 1. Association of 17 tropical white maize inbred lines as revealed by principal component analysis (FAC) on genetic distances.

View larger version (17K): [in a new window]   Fig. 2. Regression of SCA on GD (a), of F1 on GD (b), and SCA on GD (c) excluding crosses between sister lines (solid line) and P1 crosses (dashed line) across environments.