Abstract
This study presents cytological investigations of nine species of three genera: Canscora, Gentiana and Swertia of family Gentianaceae from different geographical regions of Kashmir and Himachal Pradesh in the Western Himalayas. Chromosome numbers, detailed meiotic course and pollen fertility have been studied for each species. The study includes five new chromosome counts with first chromosome reports for Gentiana aprica (2n = 20), G. argentea var. albescens (2n = 20), G. pygmea (2n = 20) and varied reports for Swertia ciliata (2n = 26) and Swertia purpurascens (2n = 18). Some studied taxa are marked with almost normal meiosis and high pollen fertility and some are with abnormal meiotic course in the form of unoriented chromosomes, chromatin stickiness, interbivalent connections/secondary bivalent associations, laggards, bridges, etc., in minor fractions. Base numbers in the three genera are briefly discussed with respect to available world level chromosome data.
Published Version
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