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HAYBRID VIGOR AND GENE ACTION OF INBRED LINES OF MAIZE | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 38, Issue 1, 2007, Pages 79-84 | ||
| Author | ||
| M. Sh. Hamdalla | ||
| Abstract | ||
| Diallel crossing was preformed among six maize inbred lines (Oh40. Zml9. CA17. CA21. CA12. and ZP607) on the farm of the Dept.of Field Crop ScL Coll. of Agric, Univ. of Baghdad, during spring and fall seasons of 2005. The objective was to evaluate several inbred lines and their hybrids, and estimating gene action in grain yield of maize according to griffing II method. In the spring season.a diallel crossing was conducted to produce 15 hybrids. Field trial was carried out(including. parents and them hybrids) using a randomized complete block design with four replicates. Significant differences and heterosis were found among genotypes. The cross CA21 X Oh40 produced lower grain yicld(8.4t/ha.).whereas higher grain yield was produced by crosses ZP607 X Zml9 and ZP607 X CA12 (12.8 t/ha).The last crosses had a higher effect of specific combining ability (1.87).The higher hybrid vigor was found in the cross CA17 X CA12 (58%).Whereas the lower was -7% in the cross Oh40 X CA21. The degree of dominance, broad sense heritability. and narrow sense heritability were 2.9, 94% and 10% respectively. The grain yield was under incomplete dominance effect. The results of this experiment revealed thai ZP607 and CA12 inbreds could be used to develop single cross hybrids in central Iraq. | ||
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