title: S-allele sequence diversity in natural populations of Solanum carolinense (Horsenettle).
abstract: S-allele diversity in Solanum carolinense was surveyed in two natural populations, located in Tennessee and North Carolina, with a molecular assay to determine the genotype of individual plants. A total of 13 different S-alleles were identified and sequenced. There is high overlap between the two populations sampled, with 10 alleles shared in common, one allele found only in Tennessee, and two found only in North Carolina. The number of alleles in this species appears to be extremely low compared with other species with gametophytic self-incompatibility. Sequence comparisons show that most alleles are extremely different one from another in their primary sequence and a phylogenetic analysis indicates extensive trans-specific evolution of S-lineages. In addition, some alleles appear to be derived much more recently. The implications of these observations are discussed in the light of recent theoretical results on S-allele population diversity and persistence.
authors.affiliation: Department of Zoology, Duke University, Durham, NC 27708-0325, USA.
authors.forename: A D
authors.initials: AD
authors.lastname: Richman
authors.forename: T H
authors.initials: TH
authors.lastname: Kao
authors.forename: S W
authors.initials: SW
authors.lastname: Schaeffer
authors.forename: M K
authors.initials: MK
authors.lastname: Uyenoyama
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D001483:Base Sequence; D017931:DNA Primers; D005838:Genotype; D008969:Molecular Sequence Data; D010802:Phylogeny; D010944:Plants / Q000145:classification / Q000235:genetics*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D017931:DNA Primers