The Nucleus

, Volume 56, Issue 3, pp 191–195 | Cite as

Distribution and cytology of Quercus baloot Griff.; an endemic tree species of North-West Himalayas

  • Eshan Sharma
  • Upvan Bushan
  • Geeta Sharma
  • Namrata Sharma
Original Article


Quercus baloot Griff. (Fagaceae) an important tree species, found in Jammu region of J & K State, India was studied for distribution and cytology. In this region, the wild stands of this species have been located at Thatri, Shalimar, Dool, Bhandarkot and Kishtwar High Altitude National Park (KHANP) areas of Kishtwar district and Sindra, Balessa, Prano, Bhalla, Chinta, Nalthi and Jai in Bhaderwah area of Doda district. Karyotypic analysis on the species collected from Sindra revealed the presence of 2n = 24 very small sized chromosomes. Of these, 2 were median and 22 were submedian. Meiosis in pollen mother cells of the species at diakinesis revealed the presence of multivalents plus bivalents in 25 % cells and 12 bivalents in 75 % cells. At metaphase-I, 12 bivalents were present. Segregation was regular at anaphase-I and pollen stainability as determined by using 1 % acetocarmine and 2, 3, 5, triphenyl tetrazolium chloride was found to be 81.5 % and 45.92 % respectively.


Bivalents Karyotype analysis Multivalent Quercus baloot 


  1. 1.
    Alamgir KG. A study on the condition, use, management and trends of major forest types in Chitral District. Report on Chitral conservation strategy and IUCN Sarhad Program. 2004;pp. 111.Google Scholar
  2. 2.
    Bedi YS, Gill BS, Bir SS. Cytological evolution in the woody taxa of Gamopetalae and Monochlamydeae. J Cytol Genet. 1985;20:162–203.Google Scholar
  3. 3.
    Brandis D. The forest flora of North-West and central India; a hand book of the indigenous trees and shrubs of those countries prepared at herbarium of the Royal Gardens, Kew. Reprinted by Bishen Singh Mahendra Pal Singh, Dehradun. 1972.Google Scholar
  4. 4.
    Burnham CR. Chromosomal interchanges in plants. Bot Rev. 1956;22:419–552.CrossRefGoogle Scholar
  5. 5.
    D’Emerico S, Balanco P, Medagli P, Schirone B. Karyotype analysis in Quercus spp. (Fagaceae). Silvae Genet. 1993;44:66–70.Google Scholar
  6. 6.
    Darlington CD, Wylie AP. Chromosome atlas of flowering plants. London: George Allen and Unwin Ltd.; 1955.Google Scholar
  7. 7.
    Denk T, Grim GW. The oaks of western Eurasia: traditional classification and evidences from two nuclear markers. Taxon. 2010;59:351–66.Google Scholar
  8. 8.
    Duffield WJ. Chromosome counts in Quercus. Am J Bot. 1940;27:787–8.CrossRefGoogle Scholar
  9. 9.
    Jovanovic M, Tucovic A. Genetics of common and sessile oaks (Quercus robur L. and petraea Liebl.). Ann Forestales. 1975;7:23–53.Google Scholar
  10. 10.
    Khan N, Ahmed M, Wahab M, Ajaib M. Phytosociology, structure and physiochemical analysis of soil in Quercus baloot Griff, District Chitral Pakistan. Pak J Bot. 2010;42:2429–41.Google Scholar
  11. 11.
    Khurram M. Studies on the isolation and characterization of secondary metabolites from Dodonaea viscose and Quercus baloot and their potential as antibacterial agents. Ph.D. Thesis. Islamabad: Quaid-I-Azam University; 2010.Google Scholar
  12. 12.
    Mehra PN, Hans AS, Sareen TS. Cytomorphology of Himalayan Fagaceae. Silvae Genet. 1972;21:102–9.Google Scholar
  13. 13.
    Natividate JV. Investigacoes nalgumas species e hybridos do genero Quercus. Bot Soc Brot. 1937;12:21–85.Google Scholar
  14. 14.
    Romero ZC. A new method for estimating karyotype asymmetry. Taxon. 1986;35:526–30.CrossRefGoogle Scholar
  15. 15.
    Sax HJ. Chromosome number in Quercus. Arnold Arbor. 1930;11:220–3.Google Scholar
  16. 16.
    Stairs GR. Microsporogenesis and embryogenesis in Quercus. Bot Gaz. 1964;125:115–21.CrossRefGoogle Scholar
  17. 17.
    Stebbins GL. Chromosomal evolution in higher plants. London: Edward Arnold; 1971.Google Scholar
  18. 18.
    Tutasuk VH, Turchaninova LV. About the chromosome number of Quercus castaneifolia C A M Dokl Akad Nauk Azerbajdzansk S S R. 1968;24:47–50.Google Scholar
  19. 19.
    Vignoli L. Studio citologico sul genere Quercus. Lav R Ist Bot Palermo. 1933;4:25–39.Google Scholar
  20. 20.
    Yilmaz A, Emel U, Babac T. Cytogenetic studies on Quercus L. (Fagaceae) species belonging to Ilex and Cerris section in Turkey. Caryologia. 2011;64:297–301.Google Scholar

Copyright information

© Archana Sharma Foundation of Calcutta 2013

Authors and Affiliations

  • Eshan Sharma
    • 1
  • Upvan Bushan
    • 1
  • Geeta Sharma
    • 1
  • Namrata Sharma
    • 1
  1. 1.Department of BotanyUniversity of JammuJammuIndia

Personalised recommendations