Confirmation and Identification of Additional QTLs for Grain Traits Using an Advanced Backcross Line from a Cross between Oryza sativa and O. grandiglumis

• Published in: Korean journal of breeding Vol. 37; no. 2
• Main Authors: Yoon, D.B. (Chungnam National University, Daejeon, Republic of Korea), Kang, K.H. (National Institute of Crop Science, RDA, Suwon, Republic of Korea), Kim, H.J. (Chungnam National University, Daejeon, Republic of Korea), Hong, S.M. (Chungnam National University, Daejeon, Republic of Korea), Ju, H.G. (Chungnam National University, Daejeon, Republic of Korea), Ahn, S.N. (Chungnam National University, Daejeon, Republic of Korea), E-mail: ahnsn@cnu.ac.kr
• Format: Journal Article
• Language: English
• Published: 01.06.2005
• Subjects: an advanced backcross line; ARROZ; grain shape traits; Oryza grandiglumis; quantitative trait loci (QTLs); RICE; RIZ; ZIZANIA
• ISSN: 0250-3360

An advanced backcross line, HG101, was produced from a single plant from BC∧5F₃ families from a cross between Oryza grandiglumis (2n=48, CCDD, Acc. No. 101154) and O. sativa subsp. japonica cv. Hwaseongbyeo. HG101 showed differences from Hwaseongbyeo in several traits, including days to heading due to the O. grandiglumis introgressions. To characterize the effects of alien genes introgressed into HG101, an F₂:₃3 population (150 lines) from the cross Hwaseongbyeo/HG101 was developed and evaluated for agronomic traits. A number of QTLs controlling traits of agronomic importance were identified and novel alleles from O. grandiglumis were detected for days to heading, spikelets per panicle, and grain traits.