Karyotypes, heterochromatin distribution and rDNA patterns in South American Grindelia (Asteraceae)

Grindelia is a genus with a complex evolutionary history with reticulate evolution. We studied the karyotype, fluorescent banding, and fluorescence in situ hybridization (FISH) using 18–5.8–26 S and 5 S ribosomal DNA probes to survey karyotypic diversity of South American Grindelia species. Chromoso...

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Detalles Bibliográficos
Autor principal: Moreno, N.C
Otros Autores: Stiefkens, L., Las Peñas, M.L, Bartoli, A., Tortosa, R., Bernardello, G.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Taylor and Francis Ltd. 2016
Acceso en línea:Registro en Scopus
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100 1 |a Moreno, N.C. 
245 1 0 |a Karyotypes, heterochromatin distribution and rDNA patterns in South American Grindelia (Asteraceae) 
260 |b Taylor and Francis Ltd.  |c 2016 
270 1 0 |m Moreno, N.C.email: ngrossberger@gmail.com 
506 |2 openaire  |e Política editorial 
520 3 |a Grindelia is a genus with a complex evolutionary history with reticulate evolution. We studied the karyotype, fluorescent banding, and fluorescence in situ hybridization (FISH) using 18–5.8–26 S and 5 S ribosomal DNA probes to survey karyotypic diversity of South American Grindelia species. Chromosome basic numbers were x = 6 (with several ploidy levels: 2x, 4x, and 6x). All the Grindelia studied conserved the patterns of CG-rich heterochromatin and 18-5.8-26 S rDNA. The third m sat-chromosome pair was homeologous in Grindelia. Chromosome variation, although not always large, accompanied the evolutionary divergence of the taxa studied. The Grindelia studied formed two species groups: (1) G. globularifolia and G. pulchella var. pulchella, (2) G. buphthalmoides, G. cabrerae var. alatocarpa and var. cabrerae, G. chiloensis, G. orientalis, and G. prostrata. These groups do not show any morphological affinities and their phylogenetic relationships are not clearly resolved, suggesting that these groups have recently diverged. © 2016 Società Botanica Italiana  |l eng 
536 |a Article in Press 
593 |a Instituto Multidisciplinario de Biología Vegetal, CONICET-UNC, Argentina 
593 |a Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina 
593 |a Facultad de Ciencias Exactas, Físicas y Naturales, UNC, Argentina 
593 |a Facultad de Agronomía, UBA, Argentina 
690 1 0 |a GRINDELIA 
690 1 0 |a HETEROCHROMATIN 
690 1 0 |a KARYOTYPE 
690 1 0 |a POLYPLOIDY 
690 1 0 |a RIBOSOMAL GENES 
700 1 |a Stiefkens, L. 
700 1 |a Las Peñas, M.L. 
700 1 |a Bartoli, A. 
700 1 |a Tortosa, R. 
700 1 |a Bernardello, G. 
773 0 |d Taylor and Francis Ltd., 2016  |h pp. 1-9  |x 11263504  |t Plant Biosyst. 
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