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| Content Provider | Springer Nature Link |
|---|---|
| Author | Cabral de Mello, Diogo Cavalcanti Cássia de Moura, Rita Souza, Maria José |
| Copyright Year | 2009 |
| Abstract | The most intriguing karyotypic variation in the Coleoptera involves variation in sex chromosome structure, origin and behavior. In this report we describe chromosomal characteristics of Deltochilum (Calhyboma) verruciferum (Coleoptera, Scarabaeidae) using conventional and differential cytogenetic techniques, with emphasis on the description of a rare sex bivalent in the Coleoptera and dispersion of repetitive DNA. This species shows 2n = 20,XYp with biarmed chromosomes. Analysis of constitutive heterochromatin through C-banding revealed mainly diphasic autosomes with short heterochromatic arms, while the X was completely heterochromatic and the Y was heterochromatic in the long arm. This pattern was confirmed through the use of CMA3 fluorochrome that stained all heterochromatic regions. Silver nitrate staining marked all heterochromatic regions and the lumen of the sex bivalent in metaphase I. These results indicated that karyotypic differentiation in D. (C.) verruciferum involved autosomal amplification and dispersion of repetitive DNA and the origin of unusual sex chromosomes (XYp), generating a unique karyotype in this species. |
| Starting Page | 191 |
| Ending Page | 195 |
| Page Count | 5 |
| File Format | |
| ISSN | 00166707 |
| Journal | Genetica |
| Volume Number | 138 |
| Issue Number | 2 |
| e-ISSN | 15736857 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2009-09-15 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Heterochromatin Meiosis Sex chromosomes evolution XYp Microbial Genetics and Genomics Human Genetics Plant Genetics & Genomics Animal Genetics and Genomics Life Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Medicine Animal Science and Zoology Insect Science |
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