Summary
-
1.
Further data are presented in support of the writer’s previous finding (Stephens, 1946) that the Corky complementary genes in New World cottons are not located at independent loci. Comparison with analogous, more critically analysed cases suggests that the complementary genes are pseudo-alleles.
-
2.
The Corky complex is located on the same chromosome in theD genom as the Crinkle/Contorta series, and no critical evidence of crossing-over between them has yet been obtained. It is suggested that the Crinkle/Contorta series may also have a pseudo-allelic basis.
-
3.
A re-examination of the complementary Crumpled mechanism in Asiatic cottons (A genom) shows striking genetic and phenotypic similarity to the Corky mechanism, and suggests that the two complexes have a similar pseudo-allelic basis. In spite of their close similarity there is, as yet, no critical evidence that Crumpled and Corky are duplicates.
-
4.
A survey of similar complementary mechanisms inCrepis andTriticum/Aegilops hybrids in comparison with Crumpled and Corky suggests that they all may have a similar basis, and may have played a part in interspecific isolation during one phase of their respective evolutionary histories. Reasons are given for the opinion that complementary isolating mechanisms are more likely to be built up from pseudo-allelic complexes than from independent loci.
Similar content being viewed by others
References
Beasley, J. O. (1942). Meiotic chromosome behavior in species, species hybrids, haploids and induced polyploids ofGossypium.Genetics,27, 25.
Bhola Nath &Govande, G. K. (1943). On the occurrence of the complementary gene for Crumpled, Cpa, in Rozi cotton.Ind. J. Genet. Pl. Breed. 3, 133.
Bridges, C. B. (1936). The bar ‘gene’ a duplication.Science,83, 210.
Dobzhansky, T. (1941).Genetics and the Origin of Species. New York: Columbia University Press.
Harland, S. C. (1932). The genetics of cotton. Part V.J. Genet. 25, 261.
Harland, S. C. (1933). Some notes on Moco cotton in Brazil.Emp. Cott. Grow. Rev. 10, 100.
Harland, S. C. (1934). Two cases of linkage in New World cottons.Trop. Agriculture, Trin.,11, 316.
Harland, S. C. (1939a).The Genetics of Cotton. London: Jonathan Cape.
Harland, S. C. (1939b). Genetical studies in the genusGossypium and their relationship to evolutionary and taxonomic problems.Proc. VIIth Int. Genet. Congr. (Edinburgh, 1939), p. 138.
Harland, S. C. &Atteck, O. M. (1941). Normal alleles of the crinkled mutant ofGossypium barbadense L. differing in dominance potency.J. Genet. 42, 21.
Hollingshead, L. (1930). A lethal factor inCrepis effective only in an interspecific hybrid.Genetics,15 114.
Hutchinson, J. B. (1932). The genetics of cotton. Part VII.J. Genet. 25, 281.
Hutchinson, J. B. (1938). The distribution ofGossypium and the evolution of the commercial cottons.1st Cotton Conf. Ind. Cent. Cotton Cttee, Bombay.
Hutchinson, J. B. (1946). The crinkled dwarf allelomorph series in the New World cottons.J. Genet. 47, 178.
Lewis, E. B. (1945). The relation of repeats to position effect inDrosophila melanogaster.Genetics,30, 137.
McClintock, B. (1944). The relation of homozygous deficiencies to mutations and allelic series in maize.Genetics,29, 478.
Mayr, E. (1942).Systematics and the Origin of Species. New York: Columbia University Press.
Muller, H. J. (1935). The origination of chromatin deficiencies as minute deletions subject to insertion elsewhere.Genetica,17, 237.
Sears, E. R. (1944). Inviability of intergeneric hybrids involvingTriticum monococcum andT. aegilopoides.Genetics,29, 113.
Serebrowsky, A. S. (1938). Genes scute and achaete inDrosophila melanogaster and a hypothesis of gene divergency.C.R. (Doklady) Acad. Sci. U.S.S.R. 19, 77.
Silow, R. A. (1941). The comparative genetics ofGossypium anomalum and the cultivated Asiatic cottons.J. Genet. 42, 259.
Silow, R. A. (1946). Evidence on chromosome homology and gene homology in the amphidiploid New World cottons.J. Genet. 47, 213.
Stephens, S. G. (1946). The genetics of ‘Corky’. Part I.J. Genet. 47, 150.
Stephens, S. G. (1948). A biochemical basis for the pseudo-allelic anthocyanin series inGossypium.Genetics,33, 191.
Yu, C. P. &Chang, T. S. (1948). Further studies on the inheritance of anthocyanin pigmentation in Asiatic cotton.J. Genet. 49, 46.
Author information
Authors and Affiliations
Additional information
(With Two Text-figures)
Rights and permissions
About this article
Cite this article
Stephens, S.G. The genetics of ‘corky’. Journ. of Genetics 50, 9–20 (1950). https://doi.org/10.1007/BF02986790
Issue Date:
DOI: https://doi.org/10.1007/BF02986790