Research article

Genetic diversity and differentiation through isozymes in natural populations of Pinus wallichiana A.B. Jacks (Blue Pine) in India

Meena Bakshi , Monnika Konnert

Meena Bakshi
Plant Physiology (Botany Division), Forest Research Institute, Dehra Dun 248 006 Uttaranchal, India. Email: bakshim@icfre.org
Monnika Konnert
Bayerische Amt für Forstliche Saat und Pflanzenzucht Forstamtsplatz 1, D-83317 Teisendorf, Germany

Online First: February 03, 2011
Bakshi, M., Konnert, M. 2011. Genetic diversity and differentiation through isozymes in natural populations of Pinus wallichiana A.B. Jacks (Blue Pine) in India. Annals of Forest Research 54(1): 23-37.


Eighteen natural populations of Pinus wallichiana (Blue pine) A.B. Jacks. occurring in Northwest Himalayas of India were studied on the basis of ten enzyme systems representing 16 isozyme loci. Allele frequencies, genetic multiplicity, diversity and genetic differentiation values are presented. A marked allele frequency difference was found in different populations. The mean number of alleles per locus was 1.79 with a range from 1.56 to 2.06 , the gene pool diversity varied from 1.11 to 1.20. Out of 46 alleles 11 (23%) appear to be rare. Of the 16 isozyme loci scored 14 (87.5 %) were polymorphic based on 99% criterion. Only the loci PGM-A and IDH-A were found to be monomorphic in all the populations. The percentage of polymorphic loci ranged from 37.5% to 68.7%. Nei's genetic distance ranged from 1.7% to 11%. The results show that natural populations of Pinus wallichiana in India contain appreciable amount of genetic variation (P99 = 53.4%, Ho = 0.152, He = 0.145) comparable to other pines (on average P99=52, H0=0.159, He = 0.159). 

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  • Meena Bakshi
  • Monnika Konnert
  • Meena Bakshi
  • Monnika Konnert