Abstract
Genetic control over chromosome stability in the interspecific hybrid embryos of Hordeum vulgare and H. bulbosum has been hypothesized to reside on specific chromosomes. In this study, crosses between the primary trisomic lines for the seven different H. vulgare chromosomes and tetraploid H. bulbosum revealed that both chromosomes 2 and 3 of H. vulgare were involved in the control of chromosome elimination. Subsequent crosses using the available monotelotrisomics for chromosomes 2 and 3 led to the conclusion that both arms of chromosome 2 and the short arm of chromosome 3 most likely contain major genetic factors.—From the results of this study and the genome balance observed in the interspecific crosses between H. vulgare and H. bulbosum at the diploid and tetraploid cytotypes, it appears that the factors causing the elimination of the bulbosum chromosomes are located on the H. vulgare chromosome. These factors are offset or balanced by factors on the H. bulbosum chromosomes which, when present in sufficient dosage, either neutralize the effects of the vulgare factors or are able to "protect" the bulbosum chromosomes.
Full Text
The Full Text of this article is available as a PDF (1.1 MB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bantock C. R. Experiments on chromosome elimination in the gall midge, Mayetiola destructor. J Embryol Exp Morphol. 1970 Sep;24(2):257–286. [PubMed] [Google Scholar]
- Gamborg O. L., Miller R. A., Ojima K. Nutrient requirements of suspension cultures of soybean root cells. Exp Cell Res. 1968 Apr;50(1):151–158. doi: 10.1016/0014-4827(68)90403-5. [DOI] [PubMed] [Google Scholar]
- Kasha K. J., Kao K. N. High frequency haploid production in barley (Hordeum vulgare L.). Nature. 1970 Feb 28;225(5235):874–876. doi: 10.1038/225874a0. [DOI] [PubMed] [Google Scholar]
- Pontecorvo G. Induction of directional chromosome elimination in somatic cell hybrids. Nature. 1971 Apr 9;230(5293):367–369. doi: 10.1038/230367a0. [DOI] [PubMed] [Google Scholar]
- Rao P. N., Johnson R. T. Premature chromosome condensation: a mechanism for the elimination of chromosomes in virus-fused cells. J Cell Sci. 1972 Mar;10(2):495–513. doi: 10.1242/jcs.10.2.495. [DOI] [PubMed] [Google Scholar]
- Riley R., Chapman V. Effect of 5Bs in suppressing the expression of altered dosage of 5Blon meiotic chromosome pairing in Triticum aestivum. Nature. 1967 Oct 7;216(5110):60–62. doi: 10.1038/216060a0. [DOI] [PubMed] [Google Scholar]
- Weiss M. C., Green H. Human-mouse hybrid cell lines containing partial complements of human chromosomes and functioning human genes. Proc Natl Acad Sci U S A. 1967 Sep;58(3):1104–1111. doi: 10.1073/pnas.58.3.1104. [DOI] [PMC free article] [PubMed] [Google Scholar]