Abstract Detail

Hybrids and Hybridization

Segovia, Claudia [1], Olmedo, Camilia [2], Vargas, Dominique [3], Caiza, Joselyn [2].

Data about Chromosomal Evolution in the Genus Polylepis (Rosaceae) from Ecuadorian Species.

Polylepis has complicate infrageneric taxonomy with few systematic treatments. In spite of the fundamental importance of chromosome numbers, repeated attempts at counting chromosomes in Polylepis have been thwarted by the small size of them and the difficulty of preparation. We therefore undertook cytogenetic studies in Polylepis with an emphasis on Ecuadorian species to provide chromosome counts for the endangered genus and assess whether polyploids are present and stomata measurements to confirm that. In addition, we used flow cytometry to determine the nuclear genome sizes. In this study, we included flow cytometry data from the Ecuadorian species that had been not included in previous studies. The combination of direct chromosome counts with flow cytometry estimation of genome size is informative to understand patterns of genome size evolution within a polyploidy complex and to define geographic patterns of ploidy. We considered the frequency of chromosomal variation in this genus, same as the relationship between genome size and chromosome number in particular lineages. Finally, we discuss the evolutionary dynamics of the chromosome numbers in the light of the phylogeny of the genus

1 - Universidad de las Fuerzas Armadas-ESPE, Ciencias de la Vida y la Agricultura, Av. Rumiñahui S/N, Sangolquí­, Pichincha, 17-12-85
2 - Universidad de las Fuerzas Armadas-ESPE, Ciencias de la Vida y la Agricultura, Av. Rumiñahui S/N, Sangolquí­, Pichincha, 17-12-85, Ecuador
3 - Universidad de las Fuerzas Armadas-ESPE, Ciencias de la Vida y la Agricultura, Av. Rumiñahui S/N, Sangolquí­, Pichincha, Ecuador

Keywords:
Rosaceae
Polylepis
Ecuador
Cytogenetic.

Presentation Type: Poster
Session: P, Hybrids and Hybridization Posters
Location: Exhibit Hall/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PHB001
Abstract ID:158
Candidate for Awards:None