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China accounts for over 50% of apple production worldwide. Very recently, a novel ilarvirus, Apple necrotic mosaic virus (ApNMV), was isolated from apple trees showing mosaic symptoms in Japan. This study compared different types of mosaic symptoms observed in apple trees in China under field conditions. Complete nucleotide sequences were obtained for six isolates of ApNMV. The genomic components varied in size from 3,378 to 3,380 nt (RNA1), 2,778 to 2,786 nt (RNA2), and 1,909 to 1,955 nt (RNA3), respectively. Although nucleotide sequence similarities with subgroup 3 ilarviruses were low (49.2 to 64.3%), results of phylogenetic analysis indicated that Chinese ApNMV isolates were clustered in subgroup 3 together with Prunus necrotic ring spot virus (PNRSV) and Apple mosaic virus (ApMV). Apple mosaic disease occurred widely in apple producing areas of China with a very high percentage (92.1%, 268 out of 291) of symptomatic trees being infected with ApNMV but not with ApMV. The data suggested that ApNMV might be the main pathogen causing apple mosaic disease in China. The genomes of the six studied Chinese ApNMV isolates demonstrated substantial sequence diversity. Here, we demonstrated a strong association of ApNMV with the mosaic disease of apple trees in China.
This article was published in the following journal.
Name: Plant disease
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Contiguous large-scale (1000-400,000 basepairs) differences in the genomic DNA between individuals, due to SEQUENCE DELETION; SEQUENCE INSERTION; or SEQUENCE INVERSION.
A multistage process that includes the determination of a sequence (protein, carbohydrate, etc.), its fragmentation and analysis, and the interpretation of the resulting sequence information.
A process that includes the determination of an amino acid sequence of a protein (or peptide, oligopeptide or peptide fragment) and the information analysis of the sequence.
A method for analyzing and mapping differences in the copy number of specific genes or other large sequences between two sets of chromosomal DNA. It is used to look for large sequence changes such as deletions, duplications, or amplifications within the genomic DNA of an individual (with a tumor for example) or family members or population or between species.
Short tracts of DNA sequence that are used as landmarks in GENOME mapping. In most instances, 200 to 500 base pairs of sequence define a Sequence Tagged Site (STS) that is operationally unique in the human genome (i.e., can be specifically detected by the polymerase chain reaction in the presence of all other genomic sequences). The overwhelming advantage of STSs over mapping landmarks defined in other ways is that the means of testing for the presence of a particular STS can be completely described as information in a database.