Open AccessKaryology of some Brazilian species of Alismataceae
Author(s) -
COSTA JÚLIA Y.,
FORNIMARTINS ELIANA R.
Publication year - 2003
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1046/j.1095-8339.2003.00193.x
Subject(s) - biology , karyotype , sensu , botany , cytotaxonomy , centromere , chromosome , chromosome number , zoology , evolutionary biology , genetics , genus , gene
The family Alismataceae ( sensu Cronquist) comprises 11 genera and 75 species of aquatic and semiaquatic herbs. In Brazil, only the two most speciose genera, Echinodorus Rich. ex Engelm. and Sagittaria L., are present. The chromosome number 2 n = 22 is common to all species. We present karyotypes for eight species, together with their asymmetry index (TF%) and total chromatin length (TCL). All karyotypes have high karyotypic asymmetry and TCL, due to their large and mostly acrocentric chromosomes. The chromosomal evolution of the Alismatidae group is discussed. © 2003 The Linnean Society of London, Botanical Journal of the Linnean Society , 2003, 143 , 159−164.