tailieunhanh - báo cáo khoa học: " Fragments of the key flowering gene GIGANTEA are associated with helitron-type sequences in the Pooideae grass Lolium perenne"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Fragments of the key flowering gene GIGANTEA are associated with helitron-type sequences in the Pooideae grass Lolium perenne | BMC Plant Biology BioMed Central Open Access Research article Fragments of the key flowering gene GIGANTEA are associated with helitron-type sequences in the Pooideae grass Lolium perenne Tim Langdon Ann Thomas Lin Huang Kerrie Farrar Julie King and Ian Armstead Address Institute of Biological Environmental and Rural Sciences Gogerddan Campus Aberystwyth University Ceredigion SY23 3EB UK Email Tim Langdon - ttl@ Ann Thomas - amt@ Lin Huang - lsh@ Kerrie Farrar - kkf@ Julie King-juk@ Ian Armstead - ipa@ Corresponding author Published 7 June 2009 Received 8 January 2009 BMC Plant Biology 2009 9 70 doi 1471-2229-9-70 Accepted 7 June 2009 This article is available from http 1471-2229 9 70 2009 Langdon et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Helitrons are a class of transposable elements which have been identified in a number of species of plants animals and fungi. They are unique in their proposed rolling-circle mode of replication have a highly variable copy-number and have been implicated in the restructuring of coding sequences both by their insertion into existing genes and by their incorporation of transcriptionally competent gene fragments. Helitron discovery depends on identifying associated DNA signature sequences and comprehensive evaluation of helitron contribution to a particular genome requires detailed computational analysis of whole genome sequence. Therefore the role which helitrons have played in modelling non-model plant genomes is largely unknown. Results Cloning of the flowering gene GfGANTEA Gf from a BAC library of the Pooideae grass Lolium perenne perennial ryegrass identified the .

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