title: Identification of RAPD markers linked to a black leaf spot resistance gene in Chinese elm.
abstract: Black leaf spot (Stegophora ulmea) is a common foliage disease on Chinese (Ulmus parvifolia) and Siberian elms (U. pumila), two species which have been widely used as sources of Dutch-elm disease-resistance genes for interspecific elm hybrids. A dominant gene controlling resistance to black leaf spot was identified in a population derived from self-pollination of a single U. parvifolia tree. Using RAPD markers, in combination with bulked segregant analysis, we have identified three markers linked to this resistance gene. A survey of Chinese-elm hybrids revealed that the same gene is likely to confer a high level of resistance to black leaf spot in interspecific elm hybrids, although other genetic factors may also be involved in the determination of a disease phenotype.
authors.affiliation: Centre d'Etudes Océanographiques et de Biologie Marine, CNRS, UPR 4601, F-29680, Roscoff, France.
authors.forename: H
authors.initials: H
authors.lastname: Benet
authors.forename: R P
authors.initials: RP
authors.lastname: Guries
authors.forename: S
authors.initials: S
authors.lastname: Boury
authors.forename: E B
authors.initials: EB
authors.lastname: Smalley