Commonalities and Contrasts in the Organization of the Maize and Sorghum Nuclear Genomes
Analysis of plant genome organization has long been the realm of plant geneticists and cytogeneticists. The multipartite (several chromosome) nature of the nuclear genome, heritable and line-specific variations in the cytology or number of chromosomes (Blakeslee, 1922; Randolph and McClintock, 1926; Stadler, 1928; Kostoff, 1929; Philip and Huskins, 1931; McClintock, 1932; Creighton, 1934; Sears, 1939; Swanson, 1940), the linear order of genes whose linkage could be determined by analysis of crossover exchanges in meiosis, the physical exchange of chromosomal segments associated with recombination (Creighton and McClintock, 1931), the properties of telomeres (McClintock, 1941), the behavior of primary and secondary constrictions as centromeres in mitosis and meiosis (Prakken and Muntzing, 1942; Rhoades and Vilkomerson, 1942), the contribution of a particular chromosomal segment (the nucleolar organizer, NOR) to formation of the nucleolus (McClintock, 1934), the existence and preferential transmission of supernumerary (B) chromosomes (Longley, 1927; Darlington and Thomas, 1941; Roman, 1947), the biology of one class of highly repetitive DNA (the knob satellite) (Rhoades and Dempsey, 1966; Peacock et al., 1981), and the properties of a key class of middle repetitive DNAs (transposable elements) (McClintock, 1950) were all identified in plants concurrent with, or prior to, their discovery in other species. Much of this initial work was performed with maize, partly due to the early and excellent characterization of its karyotypic properties (Longley, 1924).
KeywordsBacterial Artificial Chromosome Sorghum Genome Grass Genome Sorghum Chromosome Comparative Genome Mapping
Unable to display preview. Download preview PDF.
- Avramova, Z., SanMiguel, P., Georgieva, E, and Bennetzen, J.L, 1995, Matrix attachment regions and transcribed sequences within a long chromosomal continuum containing maize Adhl, Plant Cell,in press.Google Scholar
- Bennetzen, J.L, 1995a, The use of comparative genome mapping in the identification, cloning and manipulation of important plant genes, in:“The Impact of Plant Molecular Genetics,” B.W.S. Sobral, ed., Birkhauser, Boston, in press.Google Scholar
- Bennetzen, J.L, 1995b, The contributions of retroelements to plant genome structure, function, and evolution, Trends Micro,in press.Google Scholar
- Bennetzen, J.L., and Springer, P.S., 1994, The generation of Mutator transposable element subfamilies in maize, Theor. Appt. Genet 87: 657.Google Scholar
- Chittenden, LM., Schertz, K.F., Lin, Y.-R., Wing, R.A., and Paterson, A.H., 1994, A detailed RFLP map of Sorghum bicolor X S. propinquum, suitable for high-density mapping, suggests ancestral duplication of Sorghum chromosomes or chromosomal segments, Theor. Appl. Genet, 87: 925.CrossRefGoogle Scholar
- Doggett, H., 1988, “Sorghum,” John Wiley and Sons, New York.Google Scholar
- Longley, A.E, 1924, Chromosomes in maize and maize relatives, J. Agr. Res 28: 673.Google Scholar
- Longley, A.E, 1927, Supernumerary chromosomes in Zea mays, J. Agr. Res 35: 769.Google Scholar
- McClintock, B., 1934, The relation of a particular chromosomal element to the development of the nucleoli in Zea mays, Zeitschrift fur Zellforschung und mikroskopische Anatomie 21: 294.Google Scholar
- Moore, G., Abbo, S., Cheung, W., Foote, T., Gale, M., Koebner, R, Leitch, A., Leitch, I., Money, T., Stanscombe, P., Yano, M., and Flavell, R., 1993, Key features of cereal genome organisation as revealed by the use of cytosine methylation-sensitive restriction endonucleases, Genomics 15: 472.PubMedCrossRefGoogle Scholar
- Purugganan, M.D., and Wessler, S.R., 1994, Molecular evolution of magellan, a maize Ty3/gypsy-like retrotransposon, Proc. Natl. Acad. Sci. USA 91: 1 1674.Google Scholar