Summary
Four varieties and two introductions of Spinacia oleracea are cytologically studied in order to determine whether there is a heteromorphic sex chromosome pair in any of the sexes. It is observed that in one and the same preparation, and regardless of the sex of the plants, different cells had homomorphic and heteromorphic condition for chromosome 1 pair. It is concluded that as a result of differential contraction of chromosomes, the arm ratios and total lengths may vary, and give a distorted impression of certain pair of chromosomes. The absence of heteromorphic pair is confirmed in male and intersex plants by meiotic studies.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Akkoc, E., 1965. Zytogenetische Beiträge zur Geschlechtsvererbung beim Spinat (Spinacia oleracea) im Hinblick auf die Züchtung triploider hybridsorten. Z. Pfl. Zücht. 53: 226–246.
Bemis, W. P. & G. B. Wilson, 1953. A new hypothesis explaining the genetics of sexdetermination in Spinacia oleracea L., J. Heredity 44: 90–95.
Bose, S. & J. Janick, 1961. Karyo-races in Spinacia oleracea. Am. J. Bot. 48: 238–241.
Dressler, O., 1958. Zytogenetische Untersuchungen an diploidem und polyploidem Spinat unter besonderer Berücksichtigung der Geschlechtsvererbung als Grundlage einer Inzucht-Heterosis-Züchtung. Z. PflZücht. 40: 385–424.
Dressler, O., 1973. Erfahrungen bei der Vermehrung und Züchtung monözischer Spinatsorten (Spinacia oleracea L.). Z. PflZücht. 70: 108–128.
Ellis, J. R. & J. Janick, 1960. The chromosome of Spinacia oleracea. Am. J. Bot. 47: 210–214.
Iizuka, M. & J. Janick, 1963. Sex chromosome translocations in Spinacia oleracea. Genetics 48: 273–282.
Iizuka, M. & J. Janick, 1966. The synthesis of heteromorphic sex chromosome in spinach. J. Heredity 57: 182–184.
Iizuka, M. & J. Janick, 1971. Sex chromosome variation in Spinacia oleracea L. J. Heredity 62: 349–352.
Lorz, A. P., 1937. Cytological investigation on five chenopodiacious genera with special emphasis on chromosome morphology and somatic doubling in Spinacia. Cytologia 8: 241–276.
Sneep, J., 1958. The breeding of hybrid varieties and the production of hybrid seed in spinach. Euphytica 7: 119–122.
Sneep, J. 1962. Spinat. In: Handbuch der Pflanzenzüchtung 6: 227–253. Verlag Paul Parey, Berlin 071 und Hamburg.
Tabushi, J., 1958. Trisomics of spinach. Seiken Zihô 9: 49–56.
Sugiyama, S. H. & T. Suto, 1964. Studies on the artificial control of sex expression in spinach. Bull. Nat. Inst. agric. Sci. Japan, Serie D, nr. 11.
Zoschke, U., 1956. Untersuchungen über die Bestimmung des Geschlechtes beim Spinat unter besonderer Berücksichtigung der Züchtung eines monözischem oder gleichzeitig schossenden Spinats. Z. Pfl. Zücht. 35: 257–296.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ramanna, M.S. Are there heteromorphic sex chromosomes in spinach (Spinacia oleracea L.)?. Euphytica 25, 277–284 (1976). https://doi.org/10.1007/BF00041557
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00041557