title: Evolution of chromosome 6 of Solanum species revealed by comparative fluorescence in situ hybridization mapping.
abstract: Comparative genetic linkage mapping using a common set of DNA markers in related species is an important methodology in plant genome research. Here, we demonstrate a comparative fluorescence in situ hybridization (FISH) mapping strategy in plants. A set of 13 bacterial artificial chromosome clones spanning the entire length of potato chromosome 6 was used for pachytene chromosome-based FISH mapping in seven distantly related Solanum species including potato, tomato, and eggplant. We discovered one paracentric inversion and one pericentric inversion within specific lineages of these species. The comparative FISH mapping data revealed the ancestral structure of this chromosome. We demonstrate that comparative FISH mapping is an efficient and powerful methodology to study chromosomal evolution among plant species diverged for up to 12 million years.
authors.affiliation: Department of Horticulture, University of Wisconsin-Madison, 53706, USA.
authors.forename: Qunfeng
authors.initials: Q
authors.lastname: Lou
authors.forename: Marina
authors.initials: M
authors.lastname: Iovene
authors.forename: David M
authors.initials: DM
authors.lastname: Spooner
authors.forename: C Robin
authors.initials: CR
authors.lastname: Buell
authors.forename: Jiming
authors.initials: J
authors.lastname: Jiang
mesh_terms: D002874:Chromosome Mapping / Q000379:methods*; D022202:Chromosomes, Artificial, Bacterial; D032461:Chromosomes, Plant / Q000235:genetics*; D018744:DNA, Plant / Q000235:genetics; D019143:Evolution, Molecular; D008040:Genetic Linkage; D018745:Genome, Plant; D006570:Heterochromatin; D017404:In Situ Hybridization, Fluorescence; D011995:Recombination, Genetic; D032322:Solanum / Q000235:genetics*
chemical_list: D018744:DNA, Plant; D006570:Heterochromatin