Abstract
The glutamate oxaloacetate transaminase (GOT) zymogram phenotypes of a series of 15 translocation lines, a chromosome addition line and a chromosome substitution line were determined. In each of the translocation lines a segment of the long arm of Triticum aestivum chromosome 3D has been replaced by a portion of an Agropyron elongatum homoeologue. Evidence was obtained that the products of the T. aestivum GOT-3 triplicate structural gene set randomly dimerize with the product of the homoeologous A. elongatum gene. Each translocation chromosome was found to carry either Got-D3 or Got-Ag3. By correlating the zymogram phenotype expressed by each translocation line with the observed frequency of meiotic pairing of each 3D/3Ag translocation chromosome with telocentric-3DL, it was shown that Got-D3 is located in the proximal portion of 3DL, slightly more than 4.3 crossover units from the centromere. The results of this genetic study confirm and extend earlier conclusions derived from cytogenetic studies as to the physical nature of the various 3D/3Ag chromosomes.
Full Text
The Full Text of this article is available as a PDF (1.3 MB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bhatia C. R., Smith H. H. Variation associated with an Aegilops umbellulata chromosome segment incorporated in wheat. Nature. 1966 Sep 24;211(5056):1425–1426. doi: 10.1038/2111425a0. [DOI] [PubMed] [Google Scholar]
- Driscoll C J, Sears E R. Mapping of a Wheat-Rye Translocation. Genetics. 1965 Mar;51(3):439–443. doi: 10.1093/genetics/51.3.439. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Endrizzi J. E., Kohel R. J. Use of telosomes in mapping three chromosomes in cotton. Genetics. 1966 Aug;54(2):535–550. doi: 10.1093/genetics/54.2.535. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fu T. K., Sears E. R. The Relationship between Chiasmata and Crossing over in TRITICUM AESTIVUM. Genetics. 1973 Oct;75(2):231–246. doi: 10.1093/genetics/75.2.231. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hart G. E. Evidence for triplicate genes for alcohol dehydrogenase in hexaploid wheat. Proc Natl Acad Sci U S A. 1970 Aug;66(4):1136–1141. doi: 10.1073/pnas.66.4.1136. [DOI] [PMC free article] [PubMed] [Google Scholar]