New Base Number for the Chromosomally Abnormal Genus Arthraxon P. Beauv. from Rajasthan
- Authors: Kaur N.1, Gupta R.C.1
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Affiliations:
- Department of Botany, Punjabi University
- Issue: Vol 53, No 2 (2019)
- Pages: 178-183
- Section: Article
- URL: https://journals.rcsi.science/0095-4527/article/view/174066
- DOI: https://doi.org/10.3103/S0095452719020038
- ID: 174066
Cite item
Abstract
During present investigation, 4 populations covering 3 species of the genus Arthraxon P. Beauv. have been worked out cytologically from different localities of Indian hot desert, Rajasthan. Two of the three species show n = 14 (A. lanceolatus and A. lancifolius), whereas, A. hispidus show the chromosome count of n = 18. A. lanceolatus show varaiable sized bivalents i.e. two large and twelve small sized bivalents, whereas, A. lancifolius shows normal equal sized bivalents. These large sized bivalents previously might be confused with quadrivalents but during A–I it clearly indicates the chromosome count of 2n = 28. It (n = 14) is the first time reported chromosomal count for the species of the genus from the world with new proposed base number x = 7 and thus the species are considered to be tetraploid. All the three species are the first chromosome reports from Rajasthan with various meiotic abnormalities like laggards, multiple bridges, cytomixis, chromatin transfer which results in abnormal microsporogenesis and low pollen viability.
About the authors
Navjot Kaur
Department of Botany, Punjabi University
Author for correspondence.
Email: navjot21188@gmail.com
India, Patiala, 147002
Raghbir Chand Gupta
Department of Botany, Punjabi University
Email: navjot21188@gmail.com
India, Patiala, 147002