SciELO - Scientific Electronic Library Online

 
vol.10 issue21Existence of global solutions in a model of electrical activity of the monodomain type for a ventricle author indexsubject indexsearch form
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Nova scientia

On-line version ISSN 2007-0705

Abstract

RODRIGUEZ BAUTISTA, Geremías et al. Polyploidy in wild blackberries (Rubus spp L.). Nova scientia [online]. 2018, vol.10, n.21, pp.1-16. ISSN 2007-0705.  http://dx.doi.org/10.21640/ns.v10i21.1385.

Number of chromosomes is important for evolutionary studies, phylogenetic, genetic and taxonomic improvement. Due the importance of chromosomes, this research was conducted in order to determine polyploidy on blackberries Rubus adenotrichos Schltdl, R. cymosus Rydb, R. humistratus Steud, R. palmeri Rydb, R. pringlei Rydby, R sapidus Schltdl; Tupi, Kiowa, Tupí x R. sapidus and Kiowa x R. sapidus. Chromosome counting was performed on somatic cells by crushing root tips. Chromosomes were observed and counted in metaphase for each one of specie, polyploidy was determined starting from 1x = 7. Morphological characteristics of each one of specie were based on qualitative descriptors of UPOV 2006. Blackberry showed variability in the number of chromosomal games: Rubus adenotrichos (2n = 2x = 14), R. cymosus (2n = 5x = 35), R. humistratus (2n = 2x = 14), R. palmeri (2n = 4x = 28), R. pringlei (2n = 3x = 21), R. sapidus (2n = 3x = 21); Tupi (2n = 2x = 21), Kiowa (2n = 2x = 28), Tupi x R. sapidus (2n = 2x = 21) and Kiowa x R. sapidus (2n = 2x = 28). Each one of the species presented particular characteristics that characterize them, however, it was not posible to determinate the morphological characteristics associate or define the poly-ploidy in the species analyzed.

Keywords : crushed roots; chromosomes; phytogenetic resources; morphological variability.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )