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COMBINING ABILITY ANALYSIS , GENE ACTION AND HETEROSIS IN MAIZE(ZEA MAYS L.) | ||
| AL-TAQANI | ||
| Article 1, Volume 19, Issue 3, 2006, Pages 0-0 | ||
| Abstract | ||
| Seven inbred lines of corn (Zea mays L. ) were studied in line × tester analysis , by using a randomized complete block design with two replications . Data were recorded on yield and its components to determine the nature of combining effects and estimate the components of variance and genetic parameters. The value of specific combining ability variance was more than the general combining ability variance for all triats, indicating the importance of non – additive gene action. The narrow sense heritability ranged from 6.41% for number of kernel/ row to 26.09% for seed index. The estimates of average degree of dominance were more than one for all characteristics , which indicate that there is over dominance. Heterosis, measured as departure of from best parent value were observed for most of the characters. | ||
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