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Aegilops × Secale hybrids: the production and cytology of diploid hybrids

Published online by Cambridge University Press:  14 April 2009

B. N. Majisu  and
J. K. Jones
B. N. Majisu
Affiliation:
Department of Agricultural Botany, University of Reading
J. K. Jones
Affiliation:
Department of Agricultural Botany, University of Reading
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Summary

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Hybrids between four diploid species of Aegilops and species of Secale were obtained by using embryo culture. There was a marked incompatibility in the crosses between Secale species and each of the four species in Section Sitopsis of Aegilops and Ae. mutica. It is suggested that this genetic incompatibility with Secale species is an additional similarity between these species of Aegilops and the diploid species of Triticum.

Most chromosomes of Aegilops (A) and Secale (S) are univalent during meta-anaphase of meiosis in these hybrids, but some appeared to associate and others to pair as apparently normal chiasmate bivalents. Analysis of non-chiasmate and chiasmate associations showed that the frequencies of autosyndetic (AA and SS) and allosyndetic (AS) associations fitted the 3AA: 7AS: 3SS ratio expected if association and pairing is at random. Any deviations from random involved a deficiency rather than an excess of Aegilops-Secale pairing. There is no evidence that the chromosomes of Secale are homologous with those of Ae. caudata, Ae. comosa and Ae. umbel-lulata, and it is suggested that the genome of Secale species does not show any homology with the genomes of the genera Aegilops. This does not preclude the presence of homologous segments. It is suggested that the possibility of random association of chromosomes should be considered when occasional pairing in interspecific hybrids is analysed, and that identification of chromosomes and recognition of chiasmata are required. The possibilities of chiasmata between non-homologous chromosomes, of a genetic mechanism in rye which suppresses the pairing of homoeologous chromosomes, and of other factors causing asynapsis and pseudo-synapsis between genetically similar chromosomes are discussed.

Type
Research Article
Information
Genetics Research , Volume 17 , Issue 1 , February 1971 , pp. 17 - 31
Copyright
Copyright © Cambridge University Press 1971

References

REFERENCES

Bielig, L. M. & Driscoll, C. J. (1970). Substitution of rye chromosome 5RL for chromosome 5B of wheat and its effect on chromosome pairing. Genetics, Princeton 65, 241–247.CrossRefGoogle Scholar
Chennaveeraiah, M. A. (1960). Karyomorphologic and cytotaxonomic studies in Aegilops. Acta Horti Gothoburgensis 23, 85–178.Google Scholar
Chu, Y. T. E. (1967). Pachytene analysis and observations of chromosome association in haploid rice. Cytologia 32, 87–95.CrossRefGoogle Scholar
Dakar, M. G. (1967). Cytological studies on a haploid cultivar of Pelargonium, and its colchicine-induced polyploids. Chromosoma (Berl.) 21, 250–271.CrossRefGoogle Scholar
Douglas, L. T. (1966). Meiosis. I. Association of non-homologous bivalents during spermato-genesis in white mice. Genetics, Princeton 37, 466–480.Google Scholar
Grell, R. F. (1967). Pairing at the chromosomal level. Journal of Cellular Physiology 70, (Suppl. 1), 119–145.CrossRefGoogle ScholarPubMed
Kagawa, F. & Chizaki, Y. (1934). Cytological studies on the genus hybrids among Triticum, Secale and Aegilops, and species hybrids in Aegilops. Japanese Journal of Botany 7, 1–32.Google Scholar
Kimber, G. & Riley, R. (1963 a). The relationships of the diploid progenitors of hexaploid wheat. Canadian Journal of Genetics and Cytology 5, 83–88.CrossRefGoogle Scholar
Kimber, G. & Riley, R. (1963 b). Haploid angiosperms. Botanical Review 29, 480–531.CrossRefGoogle Scholar
Levan, A. (1942). Studies on the meiotic mechanism of haploid rye. Hereditas 28, 171–211.Google Scholar
Melnyk, J. (1961). The cytology and morphology of some Aegilops × Secale hybrids. Ph.D. thesis, Edmonton, Alberta, Canada.Google Scholar
Melnyk, J. & Unrau, J. (1959). Pairing between chromosomes of Aegilops squarrosa (L.) var. typica and Secale cereale (L.) var. prolific. Canadian Journal of Genetics and Cytology 1, 21–25.CrossRefGoogle Scholar
Moens, P. B. (1969). The fine structure of meiotic chromosome polarization and pairing in Locusta migratoria spermatocytes. Chromosoma (Berl.) 28, 1–25.CrossRefGoogle ScholarPubMed
Oehler, E. (1934). Untersuchungen über Ansarzverhaltnisse. Morphologic und Fertilitort bei Aegilops-Secale-bastarden. Zeitschrift für induktive Abstammungs- und Vererbungs-lehre (Molecular and General Genetics) 67, 317–341.Google Scholar
Okamoto, M. & Sears, E. R. (1962). Chromosomes involved in translocations obtained from haploids of common wheat. Canadian Journal of Genetics and Cytology 4, 24–30.CrossRefGoogle Scholar
Person, C. (1955). An analytical study of chromosome behaviour inawheat haploid. Canadian Journal of Botany 33, 11–30.CrossRefGoogle Scholar
Riley, R. & Chapman, V. (1957). Haploids and polyploids in Aegilops and Triticum. Heredity, London 11, 145–207.CrossRefGoogle Scholar
Riley, R. & Kimber, G. (1966). The transfer of alien genetic variation to wheat. Report of the Plant Breeding Institute, Cambridge, 1964–65, 6–36.Google Scholar
Riley, R. & Law, C. N. (1965). Genetic variation in chromosome pairing. Advances in Genetics 13, 57–107.CrossRefGoogle Scholar
Sears, E. R. (1941). Chromosome pairing and fertility in hybrids and amphidiploids in the Triticinae. Research Bulletin, University of Missouri College of Agriculture, no. 337.Google Scholar
Shastry, S. V. S. & Ranga Rao, D. R. (1961). Timing imbalance in the meiosis of the F 1 hybrid Oryza saliva × O. australiensis. Genetic Research, Cambridge 2, 373–383.CrossRefGoogle Scholar
Sybenga, J. (1966). The zygomere as hypothetical unit of chromosome pairing initiation. Genetica 37, 186–198.CrossRefGoogle Scholar
Tobgy, H. A. (1943). A cytogical study of Crepis fuliginosa, C. neglecta and their F 1 hybrid and its bearing on the mechanism of phylogentic reduction in chromosome size. Journal of Genetics 45, 67–110.CrossRefGoogle Scholar
Wagenaar, E. B. (1959). Intergeneric hybrids between Hordeum jubatum L. and Secale cereale L. Journal of Heredity 50, 194–201.CrossRefGoogle Scholar
Wagenaar, E. B. (1960). The cytology of three hybrids involving Hordeum jubatum L.; the chiasrna distribution and the occurrence of pseudo ring-bivalents in genetically induced asynapsis. Canadian Journal of Botany 38, 69–85.CrossRefGoogle Scholar
Walters, M. S. (1954). A study of pseudobivalents in meiosis of two interspecific hybrids of Bromus. American Journal of Botany 41, 171–190.CrossRefGoogle Scholar
von Berg, H. K. (1931). Autosyndese in Aegilops triuncialis L. × Secale cereale. Zeitschrift für Pflanzenzüchtung 17, 55–59.Google Scholar