QTLs underlying natural variation in stele and xylem structures of rice root

• DOI: 10.1270/jsbbs.58.7
• Publication Date: 2008-03-27T05:51:33Z
• Authors: Yusaku Uga; Kazutoshi Okuno; Masahiro Yano
• Keywords: Stele

Rice cultivars show a wide range of variation in stele and xylem structures the root as well thickness (RTH). We identified quantitative trait loci (QTLs) for by using 117 F3 lines from cross between lowland rice cultivar IR64 (thin roots) upland Kinandang Patong (thick roots). QTL analysis was performed genotype data consisting 197 DNA markers F2 plants phenotype plants. Stele transversal area (STA), total number late metaxylem vessels (MXA MXN) RTH were measured basal sections nodal roots. A 10 QTLs, 2 STA, 4 MXA, MXN RTH, detected on chromosomes 1, 2, 3, 9 10. The allele at all QTLs showed positive additive effect each trait, except one MXA chromosome phenotypic variance explained ranged 8.7% to 23.9%. largest (23.9%) variance. Although mapped near other did not map same chromosomal regions RTH. conclude that might be controlled several genetic factors different