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Epistasis activation contributes substantially to heterosis in temperate by tropical maize hybrids
| Creador: | Zhiqin Sang |
| Creador: | Hui Wang |
| Creador: | Yuxin Yang |
| Creador: | Zhanqin Zhang |
| Creador: | Xiaogang Liu |
| Creador: | Zhiwei Li |
| Creador: | Yunbi Xu |
| Año: | 2022 |
| URI: | https://hdl.handle.net/10883/22142 |
| Lenguaje: | English |
| Editor: | Frontiers Media S.A. |
| Copyright: | CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose |
| Tipo: | Article |
| Lugar de publicación: | Switzerland |
| Volumen: | 13 |
| DOI: | 10.3389/fpls.2022.921608 |
| Palabras Claves: | Genome-Wide Association Study |
| Palabras Claves: | Epistatic Effects |
| Palabras Claves: | Protein Interaction |
| Palabras Claves: | Multiple-Hybrid Population |
| Descripción: | Epistasis strongly affects the performance of superior maize hybrids. In this study, a multiple-hybrid population, consisting of three hybrid maize sets with varied interparental divergence, was generated by crossing 28 temperate and 23 tropical inbred lines with diverse genetic backgrounds. We obtained 1,154 tested hybrids. Among these tested hybrids, heterosis increased steadily as the heterotic genetic distance increased. Mid-parent heterosis was significantly higher in the temperate by tropical hybrids than in the temperate by temperate hybrids. Genome-wide prediction and association mapping was performed for grain weight per plant (GWPP) and days to silking (DTS) using 20K high-quality SNPs, showing that epistatic effects played a more prominent role than dominance effects in temperate by tropical maize hybrids. A total of 33 and 420 epistatic QTL were identified for GWPP and DTS, respectively, in the temperate by tropical hybrids. Protein–protein interaction network and gene-set enrichment analyses showed that epistatic genes were involved in protein interactions, which play an important role in photosynthesis, biological transcription pathways, and protein synthesis. We showed that the interaction of many minor-effect genes in the hybrids could activate the transcription activators of epistatic genes, resulting in a cascade of amplified yield heterosis. The multiple-hybrid population design enhanced our understanding of heterosis in maize, providing an insight into the acceleration of hybrid maize breeding by activating epistatic effects. |
| Agrovoc: | HETEROSIS |
| Agrovoc: | MAIZE |
| Agrovoc: | PROTEINS |
| Agrovoc: | HYBRIDS |
| Datasets relacionados: | https://figshare.com/collections/Epistasis_Activation_Contributes_Substantially_to_Heterosis_in_Temperate_by_Tropical_Maize_Hybrids/6088890 |
| ISSN: | 1664-462X |
| Revista: | Frontiers in Plant Science |
| Número de artículo: | 921608 |
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Maize
Maize breeding, phytopathology, entomology, physiology, quality, and biotech