Consulta: creatorFacets:"Perondini,André L.P."
Registros recuperados: 5
Data/hora: 10/06/2024 08:01:17

Haldane's rule and other aspects of reproductive isolation observed in the Anastrepha fraterculus complex (Diptera: Tephritidae)
Provedor de dados: 74
Autores: Selivon,Denise; Perondini,André L.P.; Morgante,João S.
Some aspects of reproductive isolation between allopatric populations of two closely related species of the Anastrepha fraterculus complex (A. fraterculus sp. 1 and sp. 2) were evaluated in laboratory conditions. Most of the crosses were fertile in each species as well as between sp. 2 females and sp. 1 males. In the reciprocal cross only 41.7% of the matings yielded viable progeny. Egg hatching occurred at similar rates within the two species, but was significantly lower in the crosses between the species. Adult emergence did not differ significantly among crosses. The sex ratio of adult progeny within each species, as well as in the hybrid progeny derived from sp. 1 females crossed to sp. 2 males, did not differ from the expected 1:1 ratio. However, in...
Tipo: Info:eu-repo/semantics/article
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000400007

Asymmetry of frontal bristles and postocular setae in species and hybrids of the Anastrepha fraterculus complex (Diptera, Tephritidae)
Provedor de dados: 74
Autores: Souza,João Maria G.A.; Gouveia,Milson; Perondini,André L.P.; Selivon,Denise.
Asymmetry of the frontal bristles and postocular setae was studied in samples from natural populations and laboratory colonies of Anastrepha sp. 1 aff. fraterculus, of A. sp. 2 aff. fraterculus, and in F1 hybrids obtained from laboratory reciprocal crosses. Natural populations were sampled in a zone of sympatry and in two geographically distant regions with different climatic conditions. Asymmetry was scored as the differences between the number of bristles and of setae on the right and left sides of the head, males and females analyzed independently. The two traits exhibited variability according to the model of fluctuating asymmetry (FA). No significant differences among samples were found in the FA of frontal bristles. A significant FA was observed for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Developmental instability; Fluctuating asymmetry; Fruit flies; Insect.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100025

Occurrence of Wolbachia in Brazilian samples of Ceratitis capitata (Wiedemann) (Diptera: Tephritidae)
Provedor de dados: 82
Autores: Rocha,Lincoln S.; Mascarenhas,Rodrigo O.; Perondini,André L.P.; Selivon,Denise.
Wolbachia bacteria were detected by PCR followed by sequencing of a fragment of the 16S ribosomal gene, in a natural population sample and in two laboratory colonies of the medfly, C. capitata (Wied.), from Brazil. Sequencing revealed that the fragment was compatible with the Wolbachia type A group found in several insect species. This is the first description of a natural Wolbachia infection in C. capitata, since several other samples from different regions so far analyzed seemed to be free of infection.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Bacteria; Medfly; Endosymbiont.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000600020

Evaluation of egg morphology from ethanol preserved females of Anastrepha sp.2 aff. fraterculus (Diptera: Tephritidae)
Provedor de dados: 82
Autores: Selivon,Denise; Vretos,Christina; Perondini,André L.P.
Features of eggshell morphology in Anastrepha sp.2 aff. fraterculus were evaluated in mature ovariole ova dissected from females preserved in ethanol, and from ovaries of fresh killed females in comparison to that of freshly laid eggs. The characteristics of sculpturing as well as of internal structure of the chorion in oviposited eggs could be observed in both samples of mature ovariole ova. Ethanol preserved females may be used as a source of eggs for morphological studies allowing this kind of analysis to species whose eggs are not readily obtained.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chorion; Vitelline membrane; Ovary.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000300028

Karyotype characterization of Anastrepha fruit flies (Diptera: Tephritidae)
Provedor de dados: 82
Autores: Selivon,Denise; Perondini,André L.P.; Rocha,Lincoln S.
The study comprises the description of the C-banded mitotic chromosomes of five species of Anastrepha, A. amita Zucchi, A. turpiniae Stone, A. zenildae Zucchi, A. grandis (Macquart) and A. leptozona Hendel , and a reanalysis of the chromosomes of three other species, A. distincta Greene, A. obliqua (Macquart) and A. sororcula Zucchi. The species have a diploid number of 12, while A. leptozona has 2n = 10. Heteromorphism of the sex chromosomes is present in all of the species, which have a XY/XX sex chromosome system. A. grandis and A. leptozona have meta and submetacentric autosomes while all of the chromosomes in the other species are acrocentric. The species can be characterized unequivocally by the length and the pattern of blocks of heterochromatin in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heterochromatin; Mitotic chromosomes; Sex chromosomes; C-band.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000200015