Field performance of transgenic indica hybrid rice with improved cooking and eating quality by down-regulation of Wx gene expression
Molecular Breeding, ISSN: 1380-3743, Vol: 16, Issue: 3, Page: 199-208
2005
- 18Citations
- 15Captures
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Article Description
High amylose content (AC) in rice endosperm is correlated with poor grain quality, particularly in indica hybrid rice. We have generated several homozygous transgenic parent lines of indica hybrid rice carrying an antisense Waxy (Wx) gene and demonstrated that the AC in seeds of these lines decreased dramatically. Two transgenic maintainer lines (L25B and L18B), derived from one of the key maintainer parents of an indica hybrid rice in China, Long-te-fu B (LTF-B), were selected and the antisense Wx gene was subsequently introgressed into the male-sterile counterpart, LTF-A, with the aim to generate improved indica hybrids. The indica hybrids derived from the selected transgenic male-sterile lines and restorer lines were tested for quality and agronomic performance under normal field conditions. Our results demonstrated that the reduction of AC in the homozygous transgenic maintainer lines stably passed down in five successive generations and the improved quality was also found in their relevant transgenic hybrids produced. The other two key characters of rice cooking and eating quality, the gel consistence (GC) and gelatinization temperature (GT), were also improved in the grains of both the transgenic maintainer lines and their relevant hybrids. In addition, no change was observed for most of the agronomic characters of the transgenic maintainer lines and the relevant transgenic hybrids. Although the grain weight of the transgenic line was reduced, the grain yield of the homozygous transgenic parent lines and the transgenic hybrids was similar when compared with that of the wild-type controls. These results suggest that transgenic approaches are an effective way to obtain rice lines with both improved qualities and high yield, especially for indica hybrid rice. © Springer 2005.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=28244471569&origin=inward; http://dx.doi.org/10.1007/s11032-005-6617-1; https://link.springer.com/10.1007/s11032-005-6617-1; https://dx.doi.org/10.1007/s11032-005-6617-1; https://link.springer.com/article/10.1007/s11032-005-6617-1; http://www.springerlink.com/index/10.1007/s11032-005-6617-1; http://www.springerlink.com/index/pdf/10.1007/s11032-005-6617-1
Springer Science and Business Media LLC
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