Abstract
Meiotic pairing preferences between identical and homologous but not identical chromosomes were analyzed in ten induced tetraploid/diploid chimaeral rye plants (Secale cereale) heterozygous for telomeric heerochromatin C-bands in both arms of chromosome 1R. These plants were the progeny of two crosses between only one plant of cv. Petkus, used as male, and two plants of the inbred lines E and R, respectively. Different pairing preferences for chromosome 1R were found: (1) between plants, (2) between chromosome arms within the same plant and (3) between bivalents and multivalents within the same plant. The possible influence in the preferences of several factors such as differences in C-heterochromatin content in the chromosomes analyzed, specific genetic control and independence in pairing behavior between both arms and partner exchange is discussed.
Full Text
The Full Text of this article is available as a PDF (1.9 MB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Santos J. L., Orellana J., Giraldez R. Pairing Competition between Identical and Homologous Chromosomes in Rye and Grasshoppers. Genetics. 1983 Aug;104(4):677–684. doi: 10.1093/genetics/104.4.677. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Thomas J. B., Kaltsikes P. J. A possible effect of heterochromatin on chromosome pairing. Proc Natl Acad Sci U S A. 1974 Jul;71(7):2787–2790. doi: 10.1073/pnas.71.7.2787. [DOI] [PMC free article] [PubMed] [Google Scholar]