Proceedings of the Korean Society of Crop Science Conference (한국작물학회:학술대회논문집)
- 2017.06a
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- Pages.95-95
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- 2017
Novel quantitative trait loci for the strong-culm and high-yield related traits in rice detected from the F2 population between the super thick-culm and super grain-bearing line 'LTAT-29' and the high-yielding variety 'Takanari'
- Nomura, Tomohiro (Graduate School of Agriculture, Tokyo University of Agriculture and Technology) ;
- Yamamoto, Toshio (Institute of Crop Science, NARO) ;
- Ueda, Tadamasa (Institute of Crop Science, NARO) ;
- Yonemaru, Junichi (Institute of Crop Science, NARO) ;
- Abe, Akira (Iwate Biotechnology Research Center) ;
- Adachi, Shunsuke (Graduate School of Agriculture, Tokyo University of Agriculture and Technology) ;
- Hirasawa, Tadashi (Graduate School of Agriculture, Tokyo University of Agriculture and Technology) ;
- Ookawa, Taiichiro (Graduate School of Agriculture, Tokyo University of Agriculture and Technology)
- Published : 2017.06.04
Abstract
Lodging is a serious issue in rice production, because it drastically decreases the biomass production and grain yield. Since the Green Revolution, the lodging resistance has been increased by lowering the moment of above-ground parts due to the short culm by the semi-dwarf gene sd1. However, it has been pointed out that sd1 alone has suppressive effects for biomass production and yield. To increase rice yield, the long-culm and large panicle type varieties with a superior lodging resistance need to be developed. To improve the lodging resistance and yield of these type varieties, it would be effective to identify novel alleles for these traits underlying natural variations in rice and to pyramid these alleles to a single rice variety. In order to perform this strategy, we have developed new rice lines derived from crosses among varieties with superior alleles. At first, TULT-gh-5-5 was selected from a cross between strong culm and high biomass variety Leaf Star and high-yielding variety Takanari, and TUAT-32HB was selected from a cross between high-yielding variety Akenohoshi and Takanari. Then, we developed the super thick-culm and super grain-bearing line, LTAT-29 derived from a cross between TULT-gh-5-5 and TUAT-32HB. In the current study, to identify the QTLs and genes relating to the strong culm and the high yield of LTAT-29, we performed QTL analysis using SNPs markers with