Meiotic Studies in Some Species of Tribe Cichorieae (Asteraceae) from Western Himalayas. (12th November 2014)

• Record Type: Journal Article
• Authors: Gupta, Raghbir Chand; Goyal, Henna; Singh, Vijay; Goel, Rajesh Kumar
• Other Names: Tate Jennifer A. Academic Editor.
• Is Part Of: TheScientificWorldjournal. Volume 2014(2014)
• Publication Date: 2014-11-12
• Subjects: Science -- Periodicals; Technology -- Periodicals; Medicine -- Periodicals; 505
• DOI: 10.1155/2014/673456
• Languages: English
• ISSNs: 2356-6140

Abstract

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 (2 n = 10 ) and Lactuca lessertiana (2 n = 2 x = 16 ). Further, intraspecific variability has been reported for the first time in H. umbellatum (2 n = 2 x = 10 and 2 n = 6 x = 54 ), Tragopogon dubius (2 n = 2 x = 14 and 2 n = 4 x = 28 ), and T. gracilis (2 n = 2 x = 14 ). The chromosome report of 2 n = 2 x = 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.