Cytotaxonomical Studies in the Setcreasea brevifolia Complex

Abstract

Cytogenetical studies under taken in the interspecific hybrids Setereasea brevifolia×S. talon I revealed that their chromosome behaviour during meiosis was similar to those of their parents. Multivalents and univalents were observed besides bivalents at metaphase I. Also, lagging chromosomes and unequal distribution of chromosomes at anaphase I, micronuclei at dyad and tetrad spore stages and variable number of chromosomes during pollen mitosis were observed in the parents and their hybrids.
The relationships between the two parental species were discussed in the light of the present findings. The two species seem to be closely related with each other.