|
Globodera Ellingtonae
''Globodera ellingtonae'' is one of the potato cyst nematodes and was recently recognized as a new species in the United States. This triggered a quarantine of the fields where it was isolated to prevent the spread of this nematode to other fields. History and significance ''Globodera ellingtonae'' was isolated in 2008 from a field near Powell Butte, Oregon and in two fields in Idaho. After detail morphological and molecular comparisons with ''G. pallida'' and ''G. rostochiensis'', ''G. ellintonae'' was described as a new species.Skantar, A.M., Handoo, Z. A., Zasada, I.A., Inghram, R.E., Carta, L.K., and Chitwood, D.J. 2011. Morphological and molecular characterization of ''Globodera'' populations from Oregon and Idaho. Phytopathology 101:480-491. ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Transcribed Spacer
Internal transcribed spacer (ITS) is the spacer DNA situated between the small-subunit ribosomal RNA (rRNA) and large-subunit rRNA genes in the chromosome or the corresponding transcribed region in the polycistronic rRNA precursor transcript. ITS across life domains In bacteria and archaea, there is a single ITS, located between the 16S and 23S rRNA genes. Conversely, there are two ITSs in eukaryotes: ITS1 is located between 18S and 5.8S rRNA genes, while ITS2 is between 5.8S and 28S (in opisthokonts, or 25S in plants) rRNA genes. ITS1 corresponds to the ITS in bacteria and archaea, while ITS2 originated as an insertion that interrupted the ancestral 23S rRNA gene. Organization In bacteria and archaea, the ITS occurs in one to several copies, as do the flanking 16S and 23S genes. When there are multiple copies, these do not occur adjacent to one another. Rather, they occur in discrete locations in the circular chromosome. It is not uncommon in bacteria to carry tRN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
