It has been postulated that whether or not
seed transmission occurs is primarily affected by host-virus interactions and the
timing of infection with environment playing a lesser role (Mink 1993). In addition,
the relation of the virus to its vector may have an effect on seed transmission and
viruses that are horizontally transmitted in a persistent manner are typically not
seed transmitted whereas those transmitted nonpersistently tend to be seed transmitted
(Bennett 1969).
Potyvirus is the largest genus in the family, with 183 known species.These viruses are 720–850 nm in length and are transmitted by [aphids]