Genomic regions associated with the degree of red coloration in pericarp of rice (Oryza sativa L.) |
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Authors: | Yanjun Dong Jianlong Xu Ke Xiao Yongjuan Zhang Junzhi Zhang Lijun Luo M. Matsuo |
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Affiliation: | 1. College of Life and Environment Sciences, Shanghai Normal University, Guilin Road No. 100, Shanghai 200234, China;2. The Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, 12 South Zhong-Guang Cun Street, Beijing 100081, China;3. Shanghai Agrobiological Gene Center, Shanghai 201106, China;4. Agricultural Faculty, Miyazaki University, Miyazaki City 889-2192, Japan |
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Abstract: | The degree of red coloration (DRC) in pericarp of rice depends on the content of flavonoid compounds which have beneficial health effects for humans. In this study, 182 backcross-recombinant inbred lines (BILs) derived from Koshihikari (white pericarp)/Kasalath (red pericarp)//Koshihikari were used to detect the genomic regions associated with DRC through the QTL mapping approach. As a result, a total of four genomic regions were found to associate with DRC on chromosomes 1, 7, 9 and 11, respectively. Interestingly, the two genomic regions having the largest effects corresponded to previously characterized Rc and Rd genes on chromosome 7 and 1, respectively. In addition, two novel genomic regions having minor effects on DRC and located on chromosomes 9 and 11, respectively, are reported here for the first time. These results and the identification of tightly linked molecular markers that flank the genomic regions provide an opportunity for marker-aided improvement of red coloration in pericarp of rice. |
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Keywords: | Oryza sativa Genomic region Degree of red coloration (DRC) Pericarp |
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