Abstract
THE incidence of tricotyly varies widely among a number of varieties of Antirrhinum majus which have been maintained by self-pollination for many years at this Institute. Present work1 on instability at the pallida locus has made possible the scoring of large families of seedlings for cotyledon number. The highest frequency occurs in a line homozygous for the mutable allele pallida-recurrens (palrec) and showing a high mutation frequency at the pal locus (palrec, High). A second line homozygous for an allele of the palrec type, but showing a very much lower mutation frequency (palrec, Low), produces no, or very few, tricotyledonous seedlings. Other lines show various intermediate frequencies. Some of the frequencies shown in material raised from seed matured and sown under glasshouse conditions are given in Table 1.
Similar content being viewed by others
Article PDF
References
Harrison, B. J., and Fincham, J. R. S., Heredity (in the press).
Haskell, G., Amer. Nat., 88, 838; 5–20 (1954).
Holtorp, H. E., Nature, 153, 13 (1944).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
HARRISON, B. Factors affecting the Frequency of Tricotyly in Antirrhinum majus. Nature 201, 424 (1964). https://doi.org/10.1038/201424a0
Issue Date:
DOI: https://doi.org/10.1038/201424a0
This article is cited by
-
Tricotyledony in sand rice (Agriophyllum squarrosum)
Genetic Resources and Crop Evolution (2023)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.