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Title: Genome Size, Chromosome Number and Morphological Data Reveal Unexpected Infraspecific Variability in Festuca (Poaceae)
Authors: Martínez-Sagarra, Gloria
Castro, Silvia 
Mota, Lucie 
Loureiro, João 
Devesa, Juan A.
Keywords: Festuca; Poaceae; flow cytometry; genome size; nuclear DNA content; tetradecaploid
Issue Date: 11-Jun-2021
Publisher: MDPI
Project: Ministerio de Economía y Competitividad through the projects Flora Iberica CGL2011-28613-C03-02, CGL2014-52787-C3-3-P and CGL2017-85204-C3-3-P, and FEDER 
FCT - POPH/FSE funds (IF/01267/2013) 
Serial title, monograph or event: Genes
Volume: 12
Issue: 6
Abstract: Polyploidy has played an important evolutionary role in the genus Festuca (Poaceae), and several ploidy levels (ranging from 2n = 2x = 14 to 2n = 12x = 84) have been detected to date. This study aimed to estimate the genome size and ploidy level of two subspecies belonging to the F. yvesii polyploid complex by flow cytometry and chromosome counting. The phenotypic variation of the cytotypes was also explored, based on herbarium material. The genome size of F. yvesii subsp. lagascae has been estimated for the first time. Nuclear 2C DNA content of F. yvesii subsp. summilusitana ranged from 21.44 to 31.91 pg, while that of F. yvesii subsp. lagascae was from 13.60 to 22.31 pg. We report the highest ploidy level detected for Festuca (2n = 14x = 98) and previously unknown cytotypes. A positive correlation between holoploid genome size and chromosome number counts shown herein was confirmed. The morphometric approach showed a slight trend towards an increase in the size of some organs consistent with the variation in the ploidy level. Differences in characters were usually significant only among the most extreme cytotypes of each subspecies, but, even in this case, the high overlapping ranges prevent their distinction.
ISSN: 2073-4425
DOI: 10.3390/genes12060906
Rights: openAccess
Appears in Collections:I&D CFE - Artigos em Revistas Internacionais

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