Unequal X Chromosomes in Bradysia Hygida (Diptera:Sciaridae) Females: Karyotype Assembly and Morphometric Analysis |
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| Authors: | Alex Rodrigues Borges Vanessa Pinatto Gaspar Maria Aparecida Fernandez |
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| Affiliation: | (1) Departamento de Biologia Celular e Genética, Universidade Estadual de Maringá, Maringá, Paraná, 87020-900, Brasil;(2) Departamento de Biologia Celular e Genética, Universidade Estadual de Maringá, Maringá, Paraná, 87020-900, Brasil |
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| Abstract: | The mitotic chromosomes of Bradysia hygida(Diptera:Sciaridae) neuroblast cells are described together with their morphometric data. Giemsa-stained neuroblast chromosomes from female and male larvae confirm the chromosome number of this species, 2n =8 (XX) and 2n=7 (XO), respectively. The karyotype assembly reveals two metacentric autosomic pairs, the A and B chromosome; a subtelocentric, the C chromosome, the smallest one; and a sexual unequal metacentric pair, X chromosome, in female karyotype and a one sexual metacentric X chromosome in male. The implications of the unequal X chromosome pair are discussed. |
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| Keywords: | Diptera karyotype mitotic chromosomes sciarids sex chromosome |
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