Cytogenetic studies were carried out on four species of Indian snakes viz Eryx conicus (Family Boidae), Naja naja naja (Family Elapidae), Vipera russelli and Echis carinatus (Family Viperidae) collected from Jammu region (J&K). Both E. conicus and N. n. naja show deviation from typical ophidian karyotype (2n=36), having 2n=34 (16 macroand 18 microchromosomes, NF=42) in E. conicus and 2n=38 (16 ...

Karyology deals with the structure of cell nuclei, especially chromosomes. Cytology dealing with the study of cells in terms of structure also, function is known nowadays to mean only the study of chromosomes or nucleus and made synonymous with karyology wrongly. Cytotaxonomy means the application of cytological data to taxonomy. Cytotaxonomy studies the morphological and cytological characteri...

In a study of Plagiomnium undulatum from Poland, variability in karyotype formula and chromosome set length contrasted with high uniformity of chromosome number. Haploid chromosome number n = 6 was counted in 215 of 216 metaphases of plants originating from five populations, and n = 7 (6 + 1m) in one cell. The chromosomes were examined and ranked by total and relative length and arm ratio. The ...

Senecio changii (Asteraceae: Senecioneae), a new species from Muli, Sichuan, southwestern China, is described. It is distinguished in Chinese Senecio s.s. by having lyrate-pinnatisect to pinnatisect leaves and a single terminal large discoid capitulum which is somewhat nodding. Evidence from floral micromorphology, karyology and molecular phylogenetic analyses based on the nuclear ITS/ETS seque...

Chromosome morphology was studied in lily genotypes L. candidum, L. × formolongi, L. henryi and L. pumilum, and cultivars ‘Alma Ata,’ ‘Expression,’ ‘Marco Polo,’ ‘Muscadet’ and ‘Star Gazer’ belonging to the horticultural group Oriental hybrids. All genotypes tested represented 2n = 2x = 24 chromosomes. Chromosomal markers were established after Feulgen and silver staining, from analysis of the ...