[Identification of quantitative trait loci controlling plant height and days to heading from Yuanjiang common wild rice (Oryza rufipogon Griff.)]

Lu-Bin Tan, Pei-Jiang Zhang, Yong-Cai Fu, Feng-Xia Liu, Xiang-Kun Wang, Chuan-Qing Sun
Yi Chuan Xue Bao, Acta Genetica Sinica 2004, 31 (10): 1123-8
An advanced backcross strategy was used to identify quantitative trait loci (QTLs) associated with plant height and days to heading in the BC3F2 population derived from an accession of common wild rice (Oryza rufipogon Griff.) from Yuanjiang in Yunnan Province of China, as the donor, and an elite Indica cultivar "Teqing", as the recipient. Based on analyses of 116 SSR markers distributed throughout the rice genome and by using single-point analysis, four putative QTLs derived from O. rufipogon were detected for plant height on chromosome 1, and 6 QTLs for days to heading on chromosome 1, 3, 7, 8 and 11. All Alleles of QTLs for plant height from O. rufipogon could increase plant height of the backcross population. One QTL near RM104 on chromosome 1, explaining 27% and 28% of phenotypic variance and additive value reached 26.24 cm and 26.28 cm respectively in Beijing and Hefei, was detected. The location of this QTL is corresponding to sd-1. One QTL near the marker RM25 on chromosome 1, explaining 13% and 15% of phenotypic variance was identified. The additive value of this QTL reached 4.60 days and 3.65 days respectively in Beijing and Hefei, and the allele from O. rufipogon could delay the backcross population's days to heading.

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