Theoretical and Applied Genetics

, Volume 41, Issue 8, pp 360–364 | Cite as

The mechanism of sex determination in Rumex acetosella

  • R. B. Singh
  • Ben W. Smith


Cytogenetic studies were made with particular emphasis on the sex-determining mechanism in Rumex acetosella (6 x = 42) and its hybrids (F1, F2, BC1 and BC2) with R. hastatulus (synthetic 4 x = 16 = 4 A +4 X = ♀ and 4 x = 18 = 4 A + 2 (X Y1Y2) = ♂). Rumex acetosella was almost strictly dioecious with 50∶50 male and female. Breeding tests revealed that the males were heterogametic. The longest chromosomes (S), usually two, are the sex chromosomes of this hexaploid species. The S chromosomes are homomorphic in both male and female. The sex chromosome: autosome ratios, and the strong epistatic male effect of the SM chromosome in the polyploid dioecious species and in the hybrids, are evidence of an X/Y Melandrium type sex-determining mechanism controlled by a single pair of homomorphic sex chromosomes. Thus, the sex chromosome formula of the males was SFSM and that of females was SFSF. The present approach is a new method for resolving the sex-determining mechanism in a dioecious species.


Present Approach Cytogenetic Study Single Pair Dioecious Species Male Effect 
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  1. 1.
    Burnham, C. R.: Discussions in Cytogenetics. Minneapolis: Burgess Publ. Co. 1962.Google Scholar
  2. 2.
    Goldschmidt, R. B.: Theoretical Genetics. Berkeley: Univ. of California Press 1955.Google Scholar
  3. 3.
    Löve, A.: Cytogenetic studies on Rumex subgenus Acetosella. Hereditas 30, 1–136 (1944).Google Scholar
  4. 4.
    Löve, A., Sarkar, N.: Cytotaxonomy and sex determination of Rumex paucifolius. Can. Journ. Bot. 34, 261–268 (1956).Google Scholar
  5. 5.
    Muller, H. J.: Why polyploidy is rarer in animals than in plants. Amer. Nat. 59, 346–353 (1925).Google Scholar
  6. 6.
    Ono, T.: Further investigations on the cytology of Rumex. VI-VIII. Bot. Mag. Tokyo 44, 168–176 (1930).Google Scholar
  7. 7.
    Ono, T.: Chromosomen und Sexualität von Rumex acetosa. Tohoku Imperial Univ., Science Reports, Ser. 4, 10, 41–210 (1935).Google Scholar
  8. 8.
    Singh, R. B.: Cytogenetic studies in Rumex acetosella and its hybrids with R. hastatulus with special consideration of sex determination. Ph. D. Thesis, North Carolina State University (1964).Google Scholar
  9. 9.
    Singh, R. B.: A dioecious polyploid in Rumex acetosella. J. Heredity 59, 168–170 (1968).Google Scholar
  10. 10.
    Smith, Ben W.: The mechanism of sex determination in Rumex hastatulus. Genetics 48, 1265 to 1288 (1963).Google Scholar
  11. 11.
    Smith, Ben W.: Cytogeography and cytotaxonomic relationships of Rumex paucifolius. Am. J. Bot. 55, 673–683 (1968).Google Scholar
  12. 12.
    Warmke, H. E.: Sex determination and sex-balance in Melandrium. Amer. J. Bot. 33, 648–660 (1946).Google Scholar
  13. 13.
    Westergaard, M.: Studies on polyploidy and sex determination in polyploid forms of Melandrium album. Dansk Bot. Arkive 10 (5), 1–131 (1940).Google Scholar
  14. 14.
    Westergaard, M.: The mechanism of sex determination in dioecious flowering plants. Advan. Genet. 9, 217–281 (1958).Google Scholar
  15. 15.
    Yamamoto, Y.: Karyogenetische Untersuchungen bei der Gattung Rumex. VI. Geschlechtsbestimmung Rumex acetosa L. Kyoto Imperial Univ., Mem. Coll. Agr. 43, 1–59 (1938).Google Scholar

Copyright information

© Springer-Verlag 1971

Authors and Affiliations

  • R. B. Singh
    • 1
  • Ben W. Smith
    • 1
    • 2
  1. 1.Division of Plant Sciences, Institute of Advanced StudiesMeerut UniversityMeerutIndia
  2. 2.North Carolina State UniversityRaleighUSA

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