title: Endogenous viral genes in a slow-feathering line of White Leghorn chickens.
abstract: Endogenous viruses related to avian leukosis viruses were characterised in three sire families of slow-feathering White Leghorns. Progeny released infectious endogenous virus when extracts were tested on subgroup E susceptible fibroblasts. Restriction fragment length polymorphisms (RFLPs) indicated germline transmission of ev1, ev5, ev21 and a hitherto unreported locus ev22 among three sire families. The association of ev21 with the release of infectious endogenous virus precluded phenotypic characterisation of ev22 present in a third family.
authors.affiliation: U.S. Department of Agriculture, Agricultural Research Service, Regional Poultry Research Laboratory, East Lansing, Michigan 48823, USA.
authors.forename: E J
authors.initials: EJ
authors.lastname: Smith
authors.forename: L B
authors.initials: LB
authors.lastname: Crittenden