| Autor: |
Anis, G. B., Elsherif, A. I., Mazal, Tahany M., Osman, Mervat M., Elbadawy, O. A. |
| Zdroj: |
Menoufia Journal of Plant Production; 2024, Vol. 9 Issue 2, p55-70, 16p |
| Abstrakt: |
The development and use of hybrid rice technology on a commercial scale may be an innovation to reduce the gap between rice production and demand to feed more than half of the world's population. Hybrid rice production is based on a combination of the cytoplasmic male sterile line (CMS) and the restored line through cross-pollination, thus identification of effective and strong restorer is an important part in this process. In the present study, the promising line GZ10848-1-2-2-1 (Giza 183) was screened using three different CMS sources (Wild Abortive, Gambiaca and Kalinga) to study the fertility restoration ability through a test-cross nursery. The results identified that GZ10848 behaved as a suitable and complete restorer variety in synchronization and some other traits for all the four CMS lines. Four strongly heterotic F1 hybrid combinations along with the check variety were evaluated to yield and its component characters. The analysis of variance of hybrid crosses revealed that highly significant differences for all studied traits. The hybrid combinations IR69625A/GZ10848 and E2021A/GZ10848 were superior for most studied traits and have high yield advantage than check commercial hybrid. All crosses demonstrated highly significant and positive standard heterosis for grain yield with values ranged from 15.58% to 20.42%. The phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all studied traits. Broad-sense heritability estimates for studied characters ranged from 31.23 to 99.04%. Highly significant positive correlations coefficient observed between grain yield and each of grain thickness and grain width. According to findings, hybrid combinations produced from this R line showed better performance relative to check variety EHR1. These results demonstrate that GZ10848 line including five fertility restorer genes Rf3, Rf4, Rf5, Rf6 and Rf1 in addition high yielding and desirable traits. Identification of like this high yield restorer line can be used in hybrid and inbred rice breeding programs to develop new hybrid rice varieties on a commercial scale. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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