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Twelve corn hybrids recommended for cropping in the south-central region of the Paraná State and 66 crossings obtained among these hybrids were evaluated for agronomic and morphological traits. These genotypes were evaluated in three experiments performed in Laranjeiras do Sul, Guarapuava and Cantagalo, Paraná State, Brazil. Heterosis and specific combining ability (SCA) were estimated for yield of husked ears. Data from measuring 22 morphological/agronomical traits of the parents were subjected to a multivariate joint analysis of variance and cluster analysis to group the parental hybrids via the neighbor method, using the generalized Mahalanobis distance. Pearson correlation coefficients between heterosis, SCA, D2 and yield of husked ears were obtained. The cross P30F44 x Sprint displayed a high mean and a high heterosis for yield of husked ears, but a moderate estimate of genetic divergence. Estimates of genetic divergence were not effective at predicting the most heterotic crossings, as Pearson correlation coefficients between D2 and heterosis and D2 and CEC were not significant. Positive significant correlations were observed between yield means and CEC and heterosis.  Doze híbridos de milho recomendadas para a região centro-sul do Paraná e os 66 cruzamentos obtidos entre eles foram avaliados quanto a caracteres agronômicos e morfológicos em Laranjeiras do Sul, Guarapuava e Cantagalo, Estado do Paraná. Foi calculada a heterose e estimada a capacidade específica de combinação (CEC) dos cruzamentos para o caráter produção de espigas despalhadas. Foram tomadas medidas de 22 caracteres morfoagronômicos dos 12 genitores e os dados foram submetidos à análise multivariada conjunta com agrupamento pelo método hierárquico do vizinho mais próximo, utilizando a distância generalizada de Mahalanobis (D2). Foram obtidas correlações entre a heterose, CEC, D2 e média da produtividade. O cruzamento P30F44 x Sprint revelou média alta e elevada heterose para peso de espigas despalhadas, embora tenha apresentado estimativa moderada da divergência genética. As estimativas de divergência genética não foram eficientes na predição dos cruzamentos mais heteróticos, pois as correlações entre D2 e heterose e entre D2 e CEC foram não significativas. Houve correlações positivas e significativas entre as médias de produção de espigas, a CEC e a heterose

Genetic divergence among maize hybrids and correlations with heterosis and combining ability