A novel Au SINE sequence found in a gymnosperm

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  • Yagi Eiki
    Laboratory of Crop Evolution, Graduate School of Agriculture, Kyoto University
  • Akita Toru
    The Nippon Shinyaku Institute for Botanical Research
  • Kawahara Taihachi
    Laboratory of Crop Evolution, Graduate School of Agriculture, Kyoto University

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Although many SINE families have been identified in the animal kingdom, only a few SINE families have been identified in plants, and their distribution is somewhat limited. The Au SINE (Au) has been found discontinuously in basal angiosperms, monocots, and eudicots. In this study, we examined the presence of the Au in gymnosperms and ferns by PCR using internal primers for Au. As a result, we found Au in a gymnosperm species, Ephedra ciliata. Therefore, Au was supposed to be present in the common ancestor of angiosperms and gymnosperms. The Au in E. ciliate was 15 bp shorter than the consensus sequence, which is similar to the Au SINE found in Glycine. However, the 3’end of the Au found in E. ciliate was more similar to the 3’end of the Medicago-type Au than that of the Glycine-type Au. A phylogenetic tree indicated that the Au sequence from E. ciliate is more closely related to the sequence found in Glycine than that found in Medicago/Lotus. These results indicated that Au were present in both angiosperms and gymnosperms.<br>

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