title: Meiotic studies in some species of tribe Cichorieae (Asteraceae) from Western Himalayas.
abstract: The present paper deals with meiotic studies in 15 species belonging to 6 genera of the tribe Cichorieae from various localities of Western Himalayas. The chromosome number has been reported for the first time in Hieracium crocatum (2n = 10) and Lactuca lessertiana (2n = 2x = 16). Further, intraspecific variability has been reported for the first time in H. umbellatum (2n = 2x = 10 and 2n = 6x = 54), Tragopogon dubius (2n = 2x = 14 and 2n = 4x = 28), and T. gracilis (2n = 2x = 14). The chromosome report of 2n = 2x = 10 in Youngia tenuifolia is made for the first time in India. Maximum numbers of the populations show laggards, chromosome stickiness, and cytomixis from early prophase to telophase-II, leading to the formation of aneuploid cells or meiocytes with double chromosome number. Such meiotic abnormalities produce unreduced pollen grains and the reduced pollen viability.
authors.affiliation: Department of Botany, Punjabi University, Patiala 147002, India.
authors.forename: Raghbir Chand
authors.initials: RC
authors.lastname: Gupta
authors.affiliation: Department of Botany, Punjabi University, Patiala 147002, India.
authors.forename: Henna
authors.initials: H
authors.lastname: Goyal
authors.affiliation: Department of Botany, Punjabi University, Patiala 147002, India.
authors.forename: Vijay
authors.initials: V
authors.lastname: Singh
authors.affiliation: Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India.
authors.forename: Rajesh Kumar
authors.initials: RK
authors.lastname: Goel
mesh_terms: D019659:Asteraceae / Q000166:cytology*; D002843:Chromatin / Q000378:metabolism; D032461:Chromosomes, Plant / Q000378:metabolism; D056130:Gametogenesis, Plant; D005843:Geography; D007194:India; D008540:Meiosis; D011058:Pollen / Q000166:cytology; D013045:Species Specificity
chemical_list: D002843:Chromatin