Major results from analyses of the pea aphid genome can be
summarized as follows:
N Extensive gene duplication has occurred in the pea aphid
genome and appears to date to around the time of the origin of
aphids.
N The aphid genome appears to have more coding genes than
previously sequenced insects, although a precise gene count
awaits better assembly and further functional annotation of the
genome. The increased gene number reflects both extensive
duplications and the presence of genes with no orthologs in
other insects.
N More than 2,000 gene families are expanded in the aphid
lineage, relative to other published genomes; examples include