Journal of Genetics

, Volume 53, Issue 2, pp 262–269 | Cite as

Cytogenetic studies in tuberousSolanum species I. Genomic differentiation in the group demissa

With plate 3 and two text-figures
  • G. E. Marks


The meiosis of a 36-chromosome plant ofSolanum demissum of undoubted polyhaploid origin is described. The significance of the type of pairing is discussed and the probable genomic constitution ofABB 1 for the polyhaploid andAABB 1B1 forS. demissum is proposed. Cytological studies of hybrids betweenS. demissum and recently described Demissa hexaploids show the first instance of gross meiotic unbalance in species hybrids of tuberousSolanums, and give further indication of genomic differentiation in the group Demissa. From an analysis of this behaviour, supported by the observations on polyhaploidS. demissum, a tentative scheme has been drawn up giving the genomic constitution of the hexaploids. From it their interrelationships are revealed and their possible origin discussed.


Pollen Fertility Species Hybrid Chiasma Frequency Preferential Pairing Genomic Differentiation 
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  1. Bains, G. S. &Howard, H. W. (1950). Haploid plants ofSolanum demissum.Nature, Land., 166. 795.Google Scholar
  2. Cooper, J. P. &Howard, H. W. (1952). The chromosome numbers of seedlings from the crossSolnnum demissum × tuberosum backcrossed byS. tuberosum. J. Genet.50, 511–21.Google Scholar
  3. Correll, D. S. (1952). SectionTuberarium of the genusSolanum of North America and Central America.Agric. Monogr. no. 11, pp. 243.Google Scholar
  4. Dodds, K. S. (1950). Polyhaploids ofSolanum demissum.Nature, Lond.,166, 795.CrossRefGoogle Scholar
  5. Hawkes, J. G. (1944). Potato collecting expeditions in Mexico and South America. II. Systematie classification of the collection. Tech. Commun. Bur. Pl. Breed. Cambridge. pp. 142.Google Scholar
  6. Hawkbs.J. G. (1954). New Solanum species in sub-sectionHyperbasarthrum Bitt.Ann. Mag. Nat. Hist.7, 689–710.Google Scholar
  7. Hawkes, J. G. (1955). Hybridization studies on four hexaploid.Solanum species in sectionHyperbasarthrum Bitt. (In preparation.)Google Scholar
  8. Howard, H. W. &Swaminathan, M. S. (1952). Speoies differentiation in the sectionTuberarium ofSolanum with particular reference to the use of interspecific hybridization in breeding.Euphytica,1, 20–28.CrossRefGoogle Scholar
  9. Howard, H. W. &Swaminathan, M. S. (1953). The cytology of haploid plants ofSolanum demissum.Genetica,26, 381–91.PubMedCrossRefGoogle Scholar
  10. Jørgensen, C. A. (1928). The experimental formation of heteroploid plants hi the genusSolanum.J. Genet.19, 133–211.CrossRefGoogle Scholar
  11. Koopmans, A. (1951). Cytogenetic studies onSolanum tuberosum L. and some of its relatives.Genetica,25, 193–337.PubMedCrossRefGoogle Scholar
  12. Lamm, R. (1945). Cytogenetic studies inSolanum sect.Tuberarium. Hereditas, Lund,31, 1–128.Google Scholar
  13. Lamm, R. (1953). Investigations on some tuber bearingSolanum hybrids.Hereditas, Lund,39, 97–112.Google Scholar
  14. Marks, G. E. (1952). A controllable carmine technic for plants with small chromosomes.Stain Tech.27, 333–36.Google Scholar
  15. Marks, G. E. (1954). An aceto-carmine glycerol jelly for use in pollen-fertility counts.Slain Tech. (in the Press).Google Scholar
  16. MÜntzing, A. (1933). Studies on meiosis in diploid and triploidSolarium tuberosum.Hereditas, Lund,17, 233–45.Google Scholar
  17. Olah, L. V. (1938). Cytogenetische Unterzuehungen in der GattungSolanum Sect.Tuberarium. III.S. commersonii Dunn, und einiger seiner Bastarde.Z. indulct. Abstamm.— u. VererbLehre,74, 228–41.CrossRefGoogle Scholar
  18. Prakken, R. &MÜntzing, A. (1942). A meiotic peculiarity in rye, simulating a terminal centromere.Hereditas, Lund,28, 441–82.CrossRefGoogle Scholar
  19. Propach, H. (1937). Cytogenetische Untersuchungen in der GattungSolanum Sect.Tuberarium. II. Triploid und tetraploide Art-bastarde.Z. indukt. Abstamm.- u. VererbLehre,73, 143–54.CrossRefGoogle Scholar
  20. Stebbins, G. L. (1945). The cytological analysis of species hybrids. II.Bot. Rev.11, 463–86.CrossRefGoogle Scholar
  21. Stephens, S. G. (1950). The internal mechanism of speciation inGossypium.Bot. Rev.16, 115–49.CrossRefGoogle Scholar
  22. Prakken, R. &Swaminathan, M. S. (1952). Cytological behaviour of some interspecific hybrids in the genusSolanum., sectTuberarium. Genetica,26, 77–191.CrossRefGoogle Scholar
  23. Swaminathan, M. S. &Howard, H. W. (1953). The cytology and genetics of the potato (Solanum tuberosum) and related species.Bibliogr. genet.16, pp. 192.Google Scholar
  24. Thomas, P. T. (1945-6).36th Annual Report of the John Innes Horticultural Institution, pp. 11.Google Scholar

Copyright information

© Indian Academy of Sciences 1955

Authors and Affiliations

  • G. E. Marks
    • 1
  1. 1.Agricultural Research CouncilPotato Genetics StationCambridge

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