title: Genetic analyses of rDNA spacer-length variation in barley.
abstract: The genetic mechanism controlling the inheritance of single and multiple spacer-length variant (slv) phenotypes in barley was investigated in six F2 segregating populations. The results indicated that two independently assorting loci, each with co-dominant alleles, govern genetic variability for rDNA in barley regardless of the number of bands expressed by a given phenotype. The following chromosomal locations are proposed: sl variants 1, 4, 5, 6, and 7 on chromosome 7, and sl variants 7, 8, 9, 12, and 13 on chromosome 6; sl variant 7 is thus located on both of the chromosomes.
authors.affiliation: Department of Plant and Soil Science, Alabama A&M University, P.O. Box 1208, 35762, Normal, AL, USA.
authors.forename: K M
authors.initials: KM
authors.lastname: Soliman