Abstract
Chromosome pairing was compared in two hybrids between A. sativa cv. Sun II and two genotypes of A. longiglumis Cw 57 and Cc 4851. More chromosomes were involved in chiasmate associations at metaphase 1 in the Cw 57 than the Cc 4851 hybrid. The extent of chromosome pairing recorded in the hybrids obtained by crossing the Cw 57xCc 4851 diploid hybrid and A. sativa showed that the variation between the two A. longiglumis accessions was genotypic, and was controlled by allelic differences at more than one locus. The effect of the Cw 57 in increasing the number of homoeologous chromosomes that paired was also apparent in the derived amphiploids. The Cw 57 genotype modifies the genetic system in A. sativa responsible for the control of diploid like pairing, resulting in the increased pairing of homoeologous chromosomes.
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References
Bell, G.D.H.: Investigations in the Triticinae. 1. Colchicine techniques for chromosome doubling in interspecific and intergeneric hybridization. J. Agric. Sci. 40, 9–18 (1950)
Crowley, J.G., Rees, H.: Fertility and selection in tetraploid Lolium. Chromosoma (Berl.) 24, 300–308 (1968)
Dover, G.A., Riley, R.: Variation at two loci affecting homoeologous meiotic chromosome pairing in Triticum aestivum x Aegilops mutica hybrids. Nature (Lond.) New Biol. 235, 61–62, (1972)
Gamborg, O.L., Miller, R.A., Ojima, K.: Nutrient requirements of suspension cultures of soya bean root cells. Exp. Cell Res. 50, 151–158 (1968)
Gaul, H.: A critical survey of genome analysis. Proc. 1st Int. Wheat Genetics Symp., pp. 194–206 (1958)
Gauthier, F.M., McGinnis, R.C.: The meiotic behaviour of a nulli-haploid plant in Avena sativa L. Canad. J. Genet. Cytol. 10, 186–189 (1968)
Hazarika, M.H., Rees, H.: Genotypic control of chromosome behaviour in rye. Chromosome pairing and fertility in autotetraploids. Heredity 22, 317–332 (1967)
John, B., Henderson, S.A.: Asynapsis and polyploidy in Schistocerca paranensis. Chromosoma (Berl.) 13, 111–147 (1962)
Legett, J.M.: The meiotic behaviour of haploids of the cultivated oat Avena sativa (2n=6x=42) Canad. J. Genet. Cytol. 19, 651–656 (1977)
Nishiyama, I., Tabata, M.: Cytogenetic studies in Avena. XII. Meiotic chromosome behaviour in a haploid cultivated oat. Jap. J. Genet. 38, 311–316 (1964)
Rajhathy, T., Thomas, H.: Genetic control of chromosome pairing in hexaploid oats. Nature (Lond.) New Biol. 239, 217–219 (1972)
Rajhathy, T., Thomas, H.: Cytogenetics of oats (Avena L.) Misc. pub. Genet. Soc. Canada, No. 2, 1974
Riley, R., Chapman, V.: Genetic control of the cytologically diploid behaviour of hexaploid wheat. Nature (Lond.) 182, 713–715 (1958)
Riley, R., Chapman, V.: The effects of the deficiency of chromosome V (5B) of Triticum aestivum on the meiosis of synthetic amphiploids, Heredity 18, 473–484 (1963)
Sears, E.R., Okamoto, M.: Intergenomic relationships in hexaploid wheat. Proc. Xth Int. Congr. Genet., 258–259 (1958)
Snow, R.: Alcoholic hydrochloric acid-carmine as a stain for chromosomes in squash preparation. Stain Technol. 38, 9–13 (1963)
Thomas, H., Bhatti, I.M.: Notes on the cytogenetic structure of the cultivated oat Avena sativa (2n=6x=42). Euphytica (Wageningen) 24, 149–157 (1975)
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Thomas, H., Al-Ansari, N. Genotypic control of chromosome pairing in Avena longiglumis × A. sativa hybrids. Chromosoma 79, 115–124 (1980). https://doi.org/10.1007/BF00328477
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DOI: https://doi.org/10.1007/BF00328477