Journal of Genetics

, Volume 36, Issue 3, pp 523–530 | Cite as

Contributions to the cytogenetics of forest trees

Joint publication from the arboretum and the laboratory of genetics, royal veterinary and agricultural college, copenhagen, denmark I. A triploid hybrid betweenLarix decidua miller andLarix occidentalis Nutt.
  • C. Syrach Larsen
  • M. Westergaard


From a cross,Larix decidua Φ (2n = 24) ×L. occidentalis Ω (2n = 24) only a single plant resulted, being a triploid hybrid (2n = 36 in root-tip mitoses) between the two species.

The hybrid is probably the result of a fertilization between a normal egg cell ofL. decidua and a diploid (unreduced) pollen grain ofL. occidentalis.

The principal features of the morphology of this hybrid are described and its possible practical forestal value is discussed.


Triploid Hybrid Reduction Division Larch Hybrid European Larch Gentian Violet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Bergström, I. (1938). “Tetraploid apple seedlings obtained from the progeny of triploid varieties.”Hereditas, Lund,24, 210–15.Google Scholar
  2. Dark, S. O. S. (1932). “Chromosomes ofTaxus, Sequoia, Cryptomeria andThuja.”Ann. Bot., Lond.,46, 965–77.Google Scholar
  3. Darlington, C. D. (1937).Recent Advances in Cytology, 2nd ed. 1937.Google Scholar
  4. Karpechenko, G. D. (1937). “Increasing the crossability of a species by doubling its chromosome number.”Bull. app. Bot. Gen. Pl. Breed. Ser. 2,7, 48–51.Google Scholar
  5. Müntzing, A. (1936). “The chromosomes of a giantPopulus tremula.”Hereditas, Lund,21, 383–93.CrossRefGoogle Scholar
  6. Nilsson-Ehle, H. (1936). “Über eine in der Natur gefundene Gigasform vonPopulus tremula.”Hereditas, Lund,21, 379–82.Google Scholar
  7. —— (1938a). “Darstellung tetraploider Äpfel und ihre Bedeutung für die praktische Apfelzüchtung Schwedens.”Hereditas, Lund,24, 195–209.Google Scholar
  8. —— (1938b). “Framställing av skogsträd med ökad kromosomtal och ökad virkeproduktion.”Svensk Papperstidning,2, 1–5.Google Scholar
  9. Ostenfeld, C. H. &Syrach Larsen, C. (1930). “The species of the genusLarix and their geographical distribution.”Kgl. Dansk. Vidensk. Selsk. Biol. Meddel.9, 2, 1–106.Google Scholar
  10. Sax, K. &Sax, H. J. (1933). “Chromosome number and morphology in the conifers.”J. Arnold Arbor.14, 356–76.Google Scholar
  11. Syrach Larsen, C. (1934). “Forest tree breeding.”Yearb. Roy. vet. agric. Coll. Copenhagen, pp. 96–113.Google Scholar
  12. —— (1937). “The employment of species, types and individuals in forestry.”Yearb. Roy. vet. agric. Coll. Copenhagen, pp. 69–222. Reprint: Reitzel, Copenhagen.Google Scholar
  13. Tischler, G. (1927). “Pflanzliche Chromosomenzahlen.”Tab. Biol.4, 1–83.Google Scholar
  14. Tometorp, G. (1937). “The chromosome numbers of two new giantPopulus tremula.”Bot. Notis. pp. 285–90.Google Scholar

Copyright information

© Indian Academy of Sciences 1938

Authors and Affiliations

  • C. Syrach Larsen
  • M. Westergaard

There are no affiliations available

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