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| Content Provider | Scientific Electronic Library Online (SciELO) |
|---|---|
| Author | Felix, Winston J. P. Dutilh, Julie H. A. Melo, Natoniel F. de Fernandes, Andrea A. Felix, Leonardo P. |
| Abstract | Zephyranthes Herb. is a taxonomically complex and cytologically variable group, with about 65 species of Neotropical distribution. Chromosome number variability in 32 individuals of a Zephyranthes sylvatica population from Northeast Brazil was investigated. Three cytotypes were found: 2n = 12 (one metacentric, four submetacentric and one acrocentric pairs), in 24 individuals; 2n = 12 + 1B, in five and three individuals with 2n = 18, a triploid cytotype. All diploid individuals showed chromosomes with polymorphism in pair one and two, while in triploids this polymorphism was observed in all chromosome triplets, generally with two homomorphic chromosomes and a higher or lower heteromorphic chromosome. All individuals had reticulated interfasic nucleus and a slightly asymmetric chromosome complement, with one metacentric chromosome pair and the others more submetacentric to acrocentric. These data confirm the cytological variability previously registered for the genus. Mechanisms involved in karyotypic evolution in this population are discussed. |
| Related Links | http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-84042008000200020&lng=en&nrm=iso http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000200020&lng=en&nrm=iso |
| Starting Page | 371 |
| Ending Page | 375 |
| Page Count | 5 |
| File Format | |
| ISSN | 01008404 |
| DOI | 10.1590/S0100-84042008000200020 |
| Journal | Brazilian Journal of Botany |
| Issue Number | 2 |
| Volume Number | 31 |
| Language | English |
| Publisher | Sociedade Botânica de São Paulo |
| Publisher Date | 2008-06-01 |
| Publisher Institution | Universidade Federal da Paraíba Centro de Ciências Agrárias Departamento de Fitotecnia Universidade Estadual de Campinas Departamento de Botânica Instituto de Biologia Embrapa Semi-árido |
| Publisher Place | Brazil |
| Access Restriction | Open |
| Subject Keyword | Amaryllidaceae B chromosomes Chromosome variability Triploid Zephyranthes Cromossomo B Triplóide Variação cromossômica |
| Alternative Title | Variação cromossômica numérica intrapopulacional em Zephyranthes sylvatica Baker (Amaryllidaceae: Hippeastreae) no Nordeste do Brasil |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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