دورية أكاديمية
Hybrid Vigour and Hybrid Mimics in Japonica Rice
| العنوان: | Hybrid Vigour and Hybrid Mimics in Japonica Rice |
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| المؤلفون: | You Zhang, Ben Ovenden, Yao He, Wenwei Ye, Xianjun Wu, William James Peacock, Elizabeth S. Dennis |
| المصدر: | Agronomy, Vol 12, Iss 7, p 1559 (2022) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2022 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | heterosis, hybrid mimics, photosynthesis, Agriculture |
| الوصف: | In crop improvement programs, hybrid vigour (heterosis) is an important breeding strategy but the molecular mechanisms of hybrid vigour are still unclear. Grain yield declines after F1 generation due to phenotypic segregation. We found that, at the early seedling stage in hybrids derived from the temperate japonica rice varieties ‘Doongara’ and ‘Reiziq’, hybrid vigour was approximately 40% greater than in the better parents. Inbred high-yielding lines (Hybrid Mimics) were developed from the ‘Doongara’ × ‘Reiziq’ F1 by selfing and recurrent selection for F1-like plants in the F2 through to the F5 generation. Grain yields are stable over subsequent generations in the Hybrid Mimic lines. The importance of photosynthesis in early seedling development was demonstrated. Photosynthesis-related genes were expressed in the hybrid earlier than in the parents; physiological evidence using gas exchange indicated the early commencement of photosynthesis. Dark germination experiments supported the requirement for photosynthesis for early vigour in hybrids. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2073-4395 |
| العلاقة: | https://www.mdpi.com/2073-4395/12/7/1559Test; https://doaj.org/toc/2073-4395Test; https://doaj.org/article/01093ceeb5074effbbfd94b38bf3c1faTest |
| DOI: | 10.3390/agronomy12071559 |
| الإتاحة: | https://doi.org/10.3390/agronomy12071559Test https://doaj.org/article/01093ceeb5074effbbfd94b38bf3c1faTest |
| رقم الانضمام: | edsbas.99AA8DC9 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 20734395 |
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| DOI: | 10.3390/agronomy12071559 |