Advertisement

Euphytica

, Volume 1, Issue 1, pp 20–28 | Cite as

Species differentiation in the section Tuberarium of Solanum with particular reference to the use of interspecific hybridisation in breeding

  • H. W. Howard
  • M. S. Swaminathan
Article

Summary

1. It is suggested that there may exist small structural differences between the chromosomes of the genoms of the tuber-bearingSolanum species.

2. For the diploid (2n = 24) species, the best evidence for such small structural differences is obtained from a comparative study of meiosis in amphidiploids and autotetraploids.

3. The problem is more complex in the tetraploid and hexaploid species. Studies of meiosis in F1S. demissum ×S. tuberosum, F1S. demissum ×S. rybinii and the triple hybrid [(S. demissum ×S. rybinii) ×S. tuberosum] suggest that the single genom ofS. rybinii, the two genoms ofS. tuberosum and the three genoms ofS. demissum are similar enough for their chromosomes to form bivalents.

4. From the results of multiple crosses, it appears that species which cannot be crossed directly withS. tuberosum may not have genoms very different from those found in that species.

5. The importance of all these studies to problems of potato breeding involving interspecific hybridisation are considered.

Keywords

Diploid Species Species Differentiation Gene Substitution Chiasma Frequency Tetraploid Hybrid 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Bains, G. S. andHoward, H. W. HaploidS. demissum plants. Nature, Lond.166 (1950): 795.CrossRefGoogle Scholar
  2. 2.
    Bains, G. S. Cytogenetical studies in the genusSolanum, sect.Tuberarium. M. Sc. degree Dissertation, University of Cambridge (1951).Google Scholar
  3. 3.
    Black, W. Inheritance of resistance to 2 strains of blight (P. infestans de Bary) in potatoes. Trans. Roy. Soc. Edinb.61 (1943): 137–147.CrossRefGoogle Scholar
  4. 4.
    Black, W. Inheritance of resistance to blight in potatoes: unbalanced segregations. Proc. Roy. Soc. Edinb. B62 (1945): 171–81.Google Scholar
  5. 5.
    Black, W. Inheritance of resistance to blight in potatoes: comparison of A and B strains. Proc. Roy. Soc. Edinb. B63 (1949): 290–301.Google Scholar
  6. 6.
    Black, W. Inheritance of resistance to blight in potatoes: strain C and its relationships. Proc. Roy. Soc. Edinb. B64 (1950): 216–28.Google Scholar
  7. 7.
    Choudhuri, H. C. Cytological and genetical studies in the genusSolanum. II. Wild and native cultivated „diploid” potatoes. Trans. Roy. Soc. Edinb.61 (1943): 199–219.CrossRefGoogle Scholar
  8. 8.
    Cooper, J. P. andHoward, H. W. The chromosome numbers of seedlings from the crossSolanum demissum ×tuberosum backcrossed byS. tuberosum. J. Genet. (1951) (in the press).Google Scholar
  9. 9.
    Dodds, K. S. Polyhaploids ofS. demissum. Nature, Lond.166 (1950): 795.CrossRefGoogle Scholar
  10. 10.
    Emme, H. Studies on interspecific hybridization of tuber bearing potatoes, sectionTuberarium Bitter, GenusSolanum L. Biol. Zhurnal7 (1938): 1093–1104.Google Scholar
  11. 11.
    Harland, S. C. The genetical conception of the species. Trop. Agric.11 (1933): 51–53.Google Scholar
  12. 12.
    Harland, S. C. The genetical conception of the species. Biol. Rev.11 (1936): 83–112.CrossRefGoogle Scholar
  13. 13.
    Ivanovskaja, E. V. A haploid plant ofS. tuberosum L. C.R. (Doklady) Acad. Sci. URSS24 (1939): 517–20.Google Scholar
  14. 14.
    Koopmans, A. Cytogenetic studies onS. tuberosum L. and some of its relatives. Genetica25 (1951): 193–337.CrossRefPubMedGoogle Scholar
  15. 15.
    Lamm, R. Cytogenetic studies inSolanum, Sect.Tuberarium. Hereditas31 (1945): 1–128.CrossRefPubMedGoogle Scholar
  16. 16.
    Propach, H. Cytogenetische Untersuchungen in der GattungSolanum, Sect.Tuberarium. IV. Tetraploide und sesquidiploide Artbastarde. Z. indukt. Abstamm. u. Vererblehre74 (1938): 376–387.Google Scholar
  17. 17.
    Propach, H. Cytogenetische Untersuchungen in der GattungSolanum, Sect.Tuberarium. V. Diploide Artbastarde. Z. indukt. Abstamm. u. Vererblehre78 (1940): 115–28.Google Scholar
  18. 18.
    Rybin, V. A. Cytological investigation of the South American cultivated and wild potatoes and its significance for plant breeding. Bull. Appl. Bot. Genet. Pl. Breed. Leningrad Ser. II,2 (1933): 3–100.Google Scholar
  19. 19.
    Stebbins, G. L. Types of polyploids: their classification and significance. Advances in Genetics1 (1947): 403–429.PubMedGoogle Scholar
  20. 20.
    Stephens, S. G. The cytogenetics of speciation inGossypium. I. Selective elimination of the donor parent genotype in interspecific crosses. Genetics34 (1949): 627–37.PubMedCentralGoogle Scholar
  21. 21.
    Stephens, S. G. The internal mechanism of speciation inGossypium. Bot. Rev.16 (1950): 115–49.CrossRefGoogle Scholar
  22. 22.
    Swaminathan, M. S. Notes on induced polyploids in the tuber-bearingSolanum species and their crossability withS. tuberosum. Amer. Potato J.28 (1951): 472–89.CrossRefGoogle Scholar
  23. 23.
    Thomas, P. T. 36th Ann. Report John Innes Horticultural Institution (1945). (1946) p. 11.Google Scholar
  24. 24.
    Toxopeus, H. J. Preliminary account of a new amphidiploid —S. Artificiale. Genetica24 (1947): 93–96.CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publisher 1952

Authors and Affiliations

  • H. W. Howard
    • 1
  • M. S. Swaminathan
    • 1
  1. 1.Plant Breeding InstituteSchool of AgricultureCambridge

Personalised recommendations