5 research outputs found
Beyond NETmundial: The Roadmap for Institutional Improvements to the Global Internet Governance Ecosystem
Beyond NETmundial: The Roadmap for Institutional Improvements to the Global Internet Governance Ecosystem explores options for the implementation of a key section of the “NETmundial Multistakeholder Statement” that was adopted at the Global Meeting on the Future of Internet Governance (NETmundial) held on April 23rd and 24th 2014 in São Paulo, Brazil. The Roadmap section of the statement concisely sets out a series of proposed enhancements to existing mechanisms for global internet governance, as well as suggestions of possible new initiatives that the global community may wish to consider. The sixteen chapters by leading practitioners and scholars are grouped into six sections: The NETmundial Meeting; Strengthening the Internet Governance Forum; Filling the Gaps; Improving ICANN; Broader Analytical Perspectives; and Moving Forward
Abundance and diversity of endogenous retroviruses in the chicken genome
Long terminal repeat (LTR) retrotransposons are autonomous eukaryotic repetitive
elements which may elicit prolonged genomic and immunological stress on their host
organism. LTR retrotransposons comprise approximately 10 % of the mammalian
genome, but previous work identified only 1.35 % of the chicken genome as LTR
retrotransposon sequence. This deficit appears inconsistent across birds, as studied
Neoaves have contents comparable with mammals, although all birds contain only one
LTR retrotransposon class: endogenous retroviruses (ERVs). One group of chicken-specific
ERVs (Avian Leukosis Virus subgroup E; ALVEs) remain active and have been
linked to commercially detrimental phenotypes, such as reduced lifetime egg count, but
their full diversity and range of phenotypic effects are poorly understood.
A novel identification pipeline, LocaTR, was developed to identify LTR retrotransposon
sequences in the chicken genome. This enabled the annotation of 3.01 % of the genome,
including 1,073 structurally intact elements with replicative potential. Elements were
depleted within coding regions, and over 40 % of intact elements were found in clusters
in gene sparse, poorly recombining regions. RNAseq analysis showed that elements were
generally not expressed, but intact transcripts were identified in four cases, supporting
the potential for viral recombination and retrotransposition of non-autonomous repeats.
LocaTR analysis of seventy-two additional sauropsid genomes revealed highly lineage-specific
repeat content, and did not support the proposed deficit in Galliformes.
A second, novel bioinformatic pipeline was constructed to identify ALVE insertions in
whole genome resequencing data and was applied to eight elite layer lines from Hy-Line
International. Twenty ALVEs were identified and diagnostic assays were developed to
validate the bioinformatic approach. Each ALVE was sequenced and characterised, with
many exhibiting high structural intactness. In addition, a K locus revertant line was
identified due to the unexpected presence of ALVE21, confirmed using BioNano optic
maps. The ALVE identification pipeline was then applied to ninety chicken lines and
322 different ALVEs were identified, 81 % of which were novel. Overall, broilers and
non-commercial chickens had a greater number of ALVEs than were found in layers.
Taken together, these two analyses have enabled a thorough characterisation of both the
abundance and diversity of chicken ERVs
2009 - 2010 University Catalog
Volume 99, Number 1, October 30, 2009
Published once a year, October 30, 2009https://scholarsrepository.llu.edu/univcatalog/1011/thumbnail.jp