Vegetos
(An International Journal of Plant Research & Biotechnology)
Cytological plasticity: a trait adopted by Artemisia nilagirica (C.B. Clake) Pamp., a proliferant in NW Himalayas, J&K, India
Research Articles | Published: 19 January, 2022
Online ISSN : 2229-4473.
Website:www.vegetosindia.org
Pub Email: contact@vegetosindia.org
First Page: 392
Last Page: 403
Views: 739
Keywords:
Artemisia
, Breeding, Cytology, Flexible, Meiosis, Rootstock variation
Abstract
Artemisia L. is a cytologically flexible and medicinally important genus of tribe Anthemideae of family Asteraceae. It is widely distributed mainly across the Northern Hemisphere, with a major centre of diversification in Asia and only a few representatives in Southern hemisphere. World over, more than 500 species of this genus have been reported, out of which a total of 45 exist in India; 20 among these being reported in J&K state, India (Karthikeyan et al. 2009), where the present work has been carried out. The compilation is based on five populations of A. nilagirica sprawling at an altitudinal range of 332–1705 masl (Jammu, Rajouri, Poonch, Bhaderwah and Kud). The species is highly complex cytologically and capable of generating variations both through its meiotic as well as breeding system. Five populations could be segregated as three cytotypes with 2n = 18 (diploid), 2n = 32 and 34 (aneuploid) and 2n = 54 (hexaploid), all of them showing high degree of outbreeding. Although the chromosomal changes have an effect upon the seed set in this species in the form of reduced percentage of healthy seeds; little amount of variability that survives and adapts is maintained and ramified asexually through rootstock. Present study rests on details of various morphological characteristics, cytological structure, chromosomal behaviour and breeding system operative in this medicinally important species.
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Acknowledgements
Authors are thankful to UGC-SAP (DRS-II) for financial assistance.
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