| Autor: |
Marhold, Karol, Kučera, Jaromír, Arnelas, Itziar, Barba‐González, Rodrigo, Catalán, Pilar, da Costa Silva, Silvokleio, Daviña, Julio Rubén, Dias Silva, Yhanndra K., Eckers, Fabiana, Aquino, Analía Cecilia Gianini, Hojsgaard, Diego Hernán, Honfi, Ana Isabel, Inda, Luis A., Martínez, Eric Javier, Moreno‐Aguilar, María Fernanda, Nascimento, Thiago, Paniagua, Gustavo, Pedrosa‐Harand, Andrea, Perichon, María Constanza, Pozzobon, Marisa Toniolo |
| Předmět: |
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| Zdroj: |
Taxon; Oct2022, Vol. 71 Issue 5, p1132-1134, 3p |
| Abstrakt: |
A, Arrows indicate the DAPI- sites on chromosomes (sm and m); B, CMA+/DAPI- bands are observed on five chromosomes: three metacentric (2 located on the short arm, 1 on the long arm) and two submetacentric (on the short arm, asterisks); C, Fluorescent in situ hybridization (FISH) where the chromosomes carrying 5S ribosomal genes (green, indicated with arrows), located in the short arms of submetacentric chromosomes, are observed. 9C] In mitosis, 2 I n i = 2 I x i = 22 chromosomes were observed in two accessions, while in the other accessions, the study of mitotic chromosomes indicated that they belong to a new pentaploid cytotype for the species, with 2 I n i = 5 I x i = 55 chromosomes. Smarda & Stancík (2006) reported different chromosome numbers and ploidy levels for I F. andicola i and I F. subulifolia i (tetraploids with 2 I n i = 28); thus, our chromosome data provide new ploidy levels for these species. Here we report new chromosome counts for four I Festuca i species from the Ecuadorian paramos: I Festuca caldasii i (Kunth) Kunth is a tetraploid with 2 I n i = 28 chromosomes, whereas I F. andicola i Kunth, I F. chimborazensis i subsp. I micacochensis i Stancík and I F. subulifolia i Benth. are hexaploids with 2 I n i = 42 chromosomes. [Extracted from the article] |
| Databáze: |
Supplemental Index |
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