General and specific combining ability of tropical and subtropical maize (Zea mays) lines.

Twenty maizelines were crossed with six inbreds used as testers, with theobjective of examining their general and specific combiningability and determine their usefulness in a hybridizationprogram. The crosses were evaluated in three environmentsat Mexico during 1997. General combining ability (GCA)...

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Autores Principales: Vergara Ávila, Narciso, Rodríguez Herrera, Sergio Alfredo, Córdova Orellana, Hugo Salvador
Formato: Artículo
Idioma: Español
Publicado: Universidad de Costa Rica 2013
Acceso en línea: http://revistas.ucr.ac.cr/index.php/agromeso/article/view/11866
http://hdl.handle.net/10669/17787
Sumario: Twenty maizelines were crossed with six inbreds used as testers, with theobjective of examining their general and specific combiningability and determine their usefulness in a hybridizationprogram. The crosses were evaluated in three environmentsat Mexico during 1997. General combining ability (GCA)and specific combining ability (SCA) effects were calculatedusing a Line x Tester analysis. CML264 (1586 kg/ha) andCML319 (1285 kg/ha) were the highest GCA lines in thetropical and subtropical group, respectively. The highestSCA effects were for the crosses CML322 x M.L.S4-1 (1651kg/ha) and CML258 x SSE255-18-19 (1512 kg/ha). Theseresults indicate that it is possible to develop a hybrid programusing the best lines released by the International Maize andWheat Improvement Center (CIMMYT), and the best testersfrom UAAAN.