Abstract
Maize production in Indonesia has increased significantly in the last five years. Various programs have been introduced by the government to support maize cropping system and increase yield per ha. In order to obtain a suitable hybrid combination, improvement of breeding program is obligatory. The objectives of the research were to determine the combining ability between lines and testers, and to evaluate the performance of crosses for agronomic component traits. Six inbred lines were test crossed with two male testers using line x tester mating design. Randomized complete block design was used as an experimental design with three replications at three locations in Indonesia. Results indicate that inbred line MYL7 had a positive and significant GCA effects for days to silking, maturity, ear diameter. Test cross MYL7×MAL01 had positive and significant SCA effect for ear length, MYL15×MAL01 for 1000-seed weight, and MYL10×MR14 for days to silking. Depend on the purpose of breeding program, each superior combination can be further explored for a specific use.
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