ASSESSMENT OF COMBINING ABILITY AND MEAN PERFORMANCE OF YIELD AND ITS CONTRIBUTING TRAITS IN MAIZE THROUGH LINE × TESTER ANALYSIS | ||
| Egyptian Journal of Plant Breeding | ||
| Volume 28, Issue 1, April 2024, Pages 117-133 PDF (643.45 K) | ||
| Document Type: Original research | ||
| DOI: 10.12816/ejpb.2024.366446 | ||
| Abstract | ||
| Assessing combing ability is crucial in maize breeding program in order to produce new highly productive hybrids and adapted to diverge environments. This investigation was carried out to identify the good combiners for maize grain yield and associated characteristics. Besides, picking up promising hybrids for studied traits. Ten promising inbreds were crossed to the two testers inbreds viz. GM-1002 and SD-3120 at Gemmiza Research Station, Agricultural Research Center (ARC), Egypt in 2022. Twenty generated hybrids were evaluated alongside with two checks viz. SC-168 and Corteva SC-3444 at three locations representing a wide range of climate and soil conditions. The trail was laid out in RCBD with three replications in each location. All the recommend agronomic package were adopted to maintain healthy plants till harvest. Data were collected on days to 50 % silking, plant and ear heights, ear length, ear diameter and grain yield (ardab/feddan). The results showed highly significant mean squares for locations and crosses. The non-addictive gene effect was the predominance for all measured characters excluding grain yield. The parental lines GM-53, GM-55 and GM-57 might be utilized as good combiners for earliness. Similarly, the lines GM-53 and GM-62 could be utilized for improving grain yield trait. Remarkably, the crosses GM-48 × SD-3120, GM-53 × SD-3120 and GM-61 × SD-3120 significantly out-performed the top check hybrid and could be considered as promising hybrids. These crosses would be advanced for multi-location trails in order to evaluate the stability before releasing as commercial hybrids by Maize Research Department, FCRI, Agricultural Research Center. | ||
| Keywords | ||
| Nod-additive; Superiority; GCA; SCA; Gene action | ||
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