한국작물학회:학술대회논문집 (Proceedings of the Korean Society of Crop Science Conference)
- 한국작물학회 2017년도 9th Asian Crop Science Association conference
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- Pages.93-93
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- 2017
Identification of the quantitative trait loci for breaking and bending types lodging resistance in rice, using recombinant inbred lines derived from Koshihikari and a strong culm variety, leaf star
- Samadi, Ahmad Fahim (Graduate School of Agriculture, Tokyo University of Agriculture and Technology) ;
- Yamamoto, Toshio (Institute of Crop Science, NARO) ;
- Ueda, Tadamasa (Institute of Crop Science, NARO) ;
- 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)
- 발행 : 2017.06.04
초록
To develop rice cultivars with increased biomass and grain yield, superior lodging resistance is an essential trait. The new breeding approach can be adopted for the improvement of stem lodging resistance by enhancing culm strength. The resistance to breaking type lodging is attributed to bending moment of basal culm (M), which is composed of the section modulus (SM) and bending stress (BS). The resistance to the bending type lodging is attributed to flexural rigidity (FR) of stem, which is composed of the secondary moment of inertia (SMI) and Young's modulus (YM). Starch and cell wall components such as cellulose, hemicellulose and lignin also play a significant role in physical strength of culm, and thus affect lodging. Leaf Star has a superior lodging resistance due to its thick and stiff culm because of its high M and FR compared with Koshihikari. Furthermore, Leaf Star contains high densities of hemicellulose, cellulose and low lignin density in culm compared with Koshihikari. In this study, we performed QTL analysis for these traits associated with culm strength, using 94 recombinant inbred lines (RILs,