title: Physical mapping of the Period gene on meiotic chromosomes of South American grasshoppers (Acridomorpha, Orthoptera).
abstract: The single-copy gene Period was located in five grasshopper species belonging to the Acridomorpha group through permanent in situ hybridization (PISH). The mapping revealed one copy of this gene in the L1 chromosome pair in Ommexecha virens, Xyleus discoideus angulatus, Tropidacris collaris, Schistocerca pallens, and Stiphra robusta. A possible second copy was mapped on the L2 chromosome pair in S. robusta, which should be confirmed by further studies. Except for the latter case, the chromosomal position of the Period gene was highly conserved among the four families studied. The S. robusta karyotype also differs from the others both in chromosome number and morphology. The position conservation of the single-copy gene Period contrasts with the location diversification of multigene families in these species. The localization of single-copy genes by PISH can provide new insights about the genomic content and chromosomal evolution of grasshoppers and others insects.
authors.affiliation: Laboratório de Experimentação em Drosophila, Departamento de Genética, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, Brasil.
authors.forename: T E
authors.initials: TE
authors.lastname: Souza
authors.affiliation: Laboratório de Experimentação em Drosophila, Departamento de Genética, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, Brasil.
authors.forename: D L
authors.initials: DL
authors.lastname: Oliveira
authors.affiliation: Laboratório de Experimentação em Drosophila, Departamento de Genética, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, Brasil.
authors.forename: J F
authors.initials: JF
authors.lastname: Santos
authors.affiliation: Laboratório de Experimentação em Drosophila, Departamento de Genética, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, Brasil tania.rieger@pq.cnpq.br.
authors.forename: T T
authors.initials: TT
authors.lastname: Rieger
mesh_terms: D000818:Animals; D059006:Chromosomes, Insect; D017124:Conserved Sequence; D019143:Evolution, Molecular; D018628:Gene Dosage; D006110:Grasshoppers / Q000145:classification* / Q000166:cytology / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence / Q000379:methods*; D059785:Karyotype; D008540:Meiosis; D056950:Period Circadian Proteins / Q000235:genetics*; D020161:Physical Chromosome Mapping / Q000379:methods*
chemical_list: D056950:Period Circadian Proteins