Chromosome number and morphology of some introduced Strylosanthes species

Abstract

Chromosome numbers have been determined for 19 accessions representing 10 species of Stylosanthes Sw. Diploids (2n = 20), tetraploids (2n = 40), and one hexaploid (2n = 60) have been found. There are differences in chromosome size and morphology. The significance of these differences in the evolution of the genus is discussed.