title: Generation-means analysis and quantitative trait locus mapping of anthracnose stalk rot genes in maize.
abstract: A generation-means analysis was performed on two maize populations, each segregating for genes conferring resistance to anthracnose stalk rot (ASR). The populations were derived from a cross of DE811ASR x DE811 and of DE811ASR x LH132. The resistant parent, DE811ASR, was obtained through introgression with MP305 as the donor and DE811 as the recurrent parent. The analysis revealed significant additive effects in both populations and a significant additive x dominant effect in the DES11ASR x DES11 population. Quantitative trait locus (QTL) mapping, using restriction fragment length polymorphism (RFLP)-based molecular markers, indicated a significant QTL on linkage group 4 in both populations. The QTL analysis confirmed additive inheritance in both populations. This work demonstrates a close correspondence between generation-means analysis and discrete observations using molecular markers. Linkage of a genetic marker to genes conferring resistance to ASR will be useful for the introgression of resistance into elite germplasm.
authors.affiliation: Department of Plant and Soil Sciences, University of Delaware, 19717-1303, Newark, DE, USA.
authors.forename: M
authors.initials: M
authors.lastname: Jung
authors.forename: T
authors.initials: T
authors.lastname: Weldekidan
authors.forename: D
authors.initials: D
authors.lastname: Schaff
authors.forename: A
authors.initials: A
authors.lastname: Paterson
authors.forename: S
authors.initials: S
authors.lastname: Tingey
authors.forename: J
authors.initials: J
authors.lastname: Hawk