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Genetic dissection of vitamin E content in rice (Oryza sativa) grains using recombinant inbred lines derived from a cross between 'Zhenshan97B' and 'Nanyangzhan'

文献类型： 外文期刊

作者： Zhang, Xiaona 1 ; Li, Pingbo 1 ; Yun, Peng 1 ; Wang, Lingqiang 1 ; Gao, Guanjun 1 ; Zhang, Qinglu 1 ; Luo, Lijun 3 ; Zhan 1 ;

作者机构： 1.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Hubei, Peoples R China

2.Huazhong Agr Univ, Natl Ctr Crop Mol Breeding, Wuhan 430070, Hubei, Peoples R China

3.Shanghai Acad Agr Sci, Shanghai Agrobiol Gene Ctr, Shanghai, Peoples R China

关键词： grain quality; Oryza sativa; Os gamma TMT; quantitative trait locus; vitamin E

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期：

页码：

收录情况： SCI

摘要： Vitamin E (VE) is an important nutritional trait in rice grains. In order to dissect the genetic basis underlying VE content, a recombinant inbred lines population derived from 'Zhenshan 97B' and 'Nanyangzhan' was used for quantitative trait locus (QTL) analysis. Totally, 29 QTLs for six VE traits were identified in 2 consecutive years. Among those, five QTLs repeatedly detected in two years formed a cluster on chromosome 2, which was responsible for all five VE isomers. Os gamma TMT, the gene encoding gamma-tocopherol methyltransferase in rice, was located to the same region and treated as the candidate gene. Sequence analysis of alleles from two parents revealed many polymorphisms, including 19 single nucleotide polymorphisms (SNPs) and two insert/deletions (Indels) in the promoter region, two nonsynonymous SNPs in exons, and 25 SNPs and an Indel in introns. Besides, a QTL for delta-tocotrienol and two QTLs for alpha-tocopherol were repeatedly detected on chromosome 5 and 8, respectively, all three regions carrying no homologous genes involved in VE biosynthesis. These results could be useful in development of rice lines displaying desirable VE content.

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