Intraspecific and interspecific polyploidy of Brazilian species of the genus Inga (Leguminosae: Mimosoideae)
| Autor: | A.E. Barros e Silva, Irenice Gomes de Oliveira, Sonia Pantoja Nascimento, Michael Figueiredo, R.L.A. Bruno, Leonardo P. Felix |
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| Rok vydání: | 2014 |
| Předmět: |
education.field_of_study
Inga Karyotype Population Fabaceae General Medicine Interspecific competition Biology biology.organism_classification Biological Evolution Chromosomes Plant Intraspecific competition Polyploidy Species Specificity Genus Botany Capitata Genetics Mimosoideae education Molecular Biology Brazil |
| Zdroj: | Genetics and Molecular Research. 13:3395-3403 |
| ISSN: | 1676-5680 |
| Popis: | We investigated the karyotypes of 13 species of six sections of the genus Inga (Leguminosae-Mimosoideae) from Brazil. We used conventional Giemsa staining to identify numerical chromosomal variations and looked for karyotypic evolutionary patterns. The karyotypes generally had small chromosomes, varying from metacentric to submetacentric, with a basic number x=13. Nine of the species showed 2n=2x=26 (I. thibaudiana, I. cayennensis, I. ingoides, I. edulis, I. vera, I. subnuda, I. striata, I. bollandii, and Inga sp), while 2n=4x=52 was seen in a population of Inga cylindrical and of I. capitata, and in five populations of I. laurina. Additionally, 2n=8x=104 was observed in a population of I. cayennensis. Eight of these counts were new, while the counts of 2n=52 for I. laurina and 2n=26 for I. marginata, I. vera, I. subnuda, and I. edulis confirmed previous studies. We did not find cytological stability among the sections studied, with occurrence of significant intra- and inter-specific numerical variations. We conclude that polyploidy has played a significant role in karyotypic evolution in this group and that it occurred independently in several sections of the genus. |
| Databáze: | OpenAIRE |
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