What does the annotation release number mean?
BDGP genome assemblies are referred to using a ‘Release_#’ notation. The decimal in FlyBase release notation refers to an annotation set produced by FlyBase that is attached to that assembly; e.g., the release for February 2010 was Release_5.25. Note that feature coordinates will only change with new release assemblies. If you want information on the current assembly and current annotation set, you should look at FlyBase’s Release Notes, opening up the subsection entitled “Drosophila melanogaster (R#.##)”. D. melanogaster has had 5 genome assemblies produced by BDGP. Release_1 and Release_2 were Celera whole genome shotgun (WGS) assemblies, whereas Releases_3, _4, _5 were all BDGP BAC tiling array assemblies taken to a high degree of finishing (except for the uncooperative parts of the centric heterochromatin and a small number of other sizeable regions containing highly repetitive sequences such as the histone gene cluster). Because of the WGS nature of Release_1 and Release_2, produc
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