Consulta: subjectFacets:"Mitotic chromosomes"
Registros recuperados: 4
Data/hora: 16/06/2024 07:08:34

Karyotype relationships among Anastrepha bistrigata, A. striata and A. serpentina (Diptera, Tephritidae)
Provedor de dados: 74
Autores: Selivon,Denise; Sipula,Fabiana Maria; Rocha,Lincoln S.; Perondini,André Luiz P.
The species of Anastrepha are arranged into 17 intrageneric groups. Recently, it was proposed that two species of the striata group, Anastrepha striata and A. bistrigata, might be realocated to serpentina group. Anastrepha bistrigata and A. serpentina have an X1X2Y/X1X1 X2X2 sex chromosome system while A. striata has a XY/XX system. It was previously proposed that the karyotype of A. bistrigata could be derived from that of A. striata by an Y:A fusion, and that the karyotype of A. serpentina would be derived from another, hypothetical karyotype. In the present report sequential staining with DAPI and chromomycin A3 (CMA3), followed by C-banding, revealed that the C-banded heterochromatic blocks of the sex chromosomes of A. bistrigata have different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flies; Mitotic chromosomes; Fluorochromes; Heterochromatin.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600009

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

Karyotype and NOR-banding of mitotic chromosomes of some Vitis L. species
Provedor de dados: 94
Autores: Pierozzi,Neiva Izabel.
Chromosome studies were performed in V. champinii, V. cinerea, V. girdiana, V. labrusca, V. rotundifolia, V. rupestris and V. vinifera with the purpose of species characterization using chromosome morphometric data and NOR banding. A median ideogram was obtained for each species. The karyotype formula obtained varied from 7m + 12sm to 9m + 11sm. The species showed moderate chromosome asymmetry values according to TF% form, Stebbins, Romero Zarco and Paszko indices. V. champinii and V. girdiana were apart from the other species by CVcl and CVci graphic representation and also formed a group apart in the dendrogram based on Euclidian distances. The chromosome pair number 3 harbors the secondary constriction and a satellite segment in all species analyzed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Karyotype; NOR-banding; Mitotic chromosomes; Vitis; Vitaceae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500077

Chromosome characterization of two varieties of Mangifera indica L.¹
Provedor de dados: 94
Autores: Pierozzi,Neiva Izabel; Rossetto,Carlos Jorge.
Chromosome studies were performed in two varieties of Mangifera indica L. (mango), 'IAC-140 Espadona' and in its progenitor 'Espada Stahl'. Both varieties showed 2n=40 chromosomes though the karyotype formulae were 8m + 10sm + 2sm s for 'Stahl' and 7m + 11sm + 2sm s for 'IAC-140'. The varieties showed moderate karyotype asymmetry which was estimated according to four different indices. Both varieties exhibited three chromosome pairs with silver impregnation after NOR-banding. The number of nucleoli within interphase cells varied from one, the commonest, to eight. The nucleolus persistent phenomenon was observed in more than 22% of metaphase cells of both varieties, seeing that in 'Stahl', up to two nucleoli were evidenced. This variety also showed one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mango; Mitotic chromosomes; Persistent nucleolus; NOR-banding; M. indica.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500074