Summary
1. In twenty-two species ofFritillaria no evidence of inversions has been found.
2. In the following species, viz.F. dasyphylla 2x, F. dasyphylla 3x, F. pudica 3x, F. citrina andF. recurva 3x, the results of crossing-over in inversions have been observed.
3. InversionA inF. dasyphylla 2x, located at, or near, the distal end of anS bivalent, has a frequency of about 70 per cent of one or two chiasmata in the inversion.
4. The expected configurations for more than one chiasma proximal to the inversion are analysed.
5. Chiasma formation in the bivalent carrying inversionA has been studied. The frequencies of the various configurations indicate a slight preponderance of comparate chiasmata.
6. Cell-wall formation by acentric fragments and univalents has been studied inF. dasyphylla. The formation of a separate cell wall requires a position of the lagging unit satisfying the maximum repulsion from both daughter nuclei. The possession of a centromere by the micronucleus is not apparently indispensable.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Darlington, C. D. (1929). “Meiosis in polyploids. II.”J. Genet.21, 17–56.
—— (1935). “The internal mechanics of the chromosomes.”Proc. roy. Soc. B.118, 33–96.
—— (1936a). “The external mechanics of the chromosomes.”Ibid. 121, 264–319.
—— (1936b). “Crossing-over and its mechanical relationships inChorthippus andStauroderus.”J. Genet. 33, 465–500.
-- (1937).Recent Advances in Cytology. 2nd ed. London.
Doughty L. R. (1936). “Chromosome behaviour in relation to genetics ofAgave.”J. Genet.33, 197–205.
McClintock, B. (1931). “Cytological observations of deficiencies involving known genes, translocations and an inversion inZea mays.”Res. Bull. Mo. Agric. exp. Sta. No. 163, 1–30.
—— (1933). “The association of non-homologous parts of chromosomes in the mid-prophase of meiosis inZea mays.”Z. Zellforsch. 19, 191–237.
Müntzing, A. (1934). “Chromosome fragmentation in aCrepis hybrid.”Hereditas,19, 284–302.
Richardson, M. M. (1936). “Structural Hybridity inLilium Martagon. Album × L.Hansonii.”J. Genet.32, 411–50.
Smith, S. G. (1935). “Chromosome fragmentation produced by crossing-over inTrillium erectum (L.).” Ibid.30, 227–32.
Upcott, M. (1937). “The genetic structure ofTulipa.II. Structural hybridity.”J. Genet.34, 339–98.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Frankel, O.H. Inversions inFritillaria . Journ. of Genetics 34, 447–462 (1937). https://doi.org/10.1007/BF02982306
Issue Date:
DOI: https://doi.org/10.1007/BF02982306