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Recent amplification of osr4 LTR-retrotransposon caused rice D1 gene mutation and dwarf phenotype

Plant Diversity 2017年第2期39卷 73-79页

作者： Jie Chen Hong Zhao Xiujuan Zheng Kangjing Liang Yuchun Guo Xinli Sun Key Laboratory of Ministry of Education~or Genetics Breeding and Multiple Utilization of Crops Fujian Agriculture & Forestry University Fuzhou 350002China College of Crop Science Fujian Agriculture & Forestry University Fuzhou 350002 China

A novel rice d1 mutant was identified using map-based cloning and comparative analysis of known dl *** mutant[d1-a) shows a mild dwarf trait,which differs only slightly from the wildtype in plant height at the tillering *** dl-a mutant is different from other dl *** found that it was interrupted by an osr4 long terminal repeat(LTR)-retrotransposon,which resulted in the loss of exon 7 in the mutant D1 mRNA.A paralog of the D1 gene.D1-like,was revealed.D1-like is a truncated gene that might have resulted from recombination between *** identified 65 osr4LTR-retrotransposons in Nipponbare,and found more LTR variants in contrast to coding DNA sequence(CDS) in the *** also identified five possible regulatory motifs in LTRs which may control the expression of the *** addition,we predicted six putative functional osr4 retrotransposons that contain complete CDSs and all important ***4 retrotransposons were classified into 4 groups,and this type of retrotransposon only appears to be present in *** of group 1-1,which included all putative functional retrotransposons,showed a high similarity with each *** retrotransposons were expressed in all tissues,at especially higher levels in some leaves and *** findings imply that transpositions of group 1-1 members might have occurred frequently and recently.

关键词： Rice Dwarf osr4 retrotransposon D1 gene

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