DOCUMENTED CHROMOSOME NUMBERS 1995:1. CHROMOSOME NUMBER OF CORNUS SESSILIS (CORNACEAE): PHYLOGENETIC AFFINITY AND EVOLUTION OF CHROMOSOME NUMBERS IN CORNUS

摘要

The chromosome number of the Californian cornelian cherry, Cornus sessilis Torr., is determined to be 2n=20, differing from the number (2n=18) reported for other cornelian cherries. This is the first report of a chromosome number for C. sessilis. Thefinding of 2n = 20 in C. sessilis along with evidence from morphology and molecular data helps clarify the evolutionary rrend of chromosome numbers in Cornus and suggests an early divergence between the species and its close relatives, C. mas - C. officinalis - C. chinerías.