Abstract
The mean chiasma frequency at first metaphase of meiosis in pollen mother cells of a maize variety, Black Mexican Sweet Corn, increases with increasing number ofB-chromosomes. The increased chiasma frequency is also reflected by a decrease in the number of rod bivalents at first metaphase.
There is some indication that theB-chromosomes also influence the distribution of chiasmata between pollen mother cells.
The increase in chiasma frequency due toBs is closely analogous to the increase in crossing-over carlier attributed toBs between marker genes located on chromosome III. Together the evidence confirm the role ofBs in controlling genetic recombination at meiosis.
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References
Bosemark, N. O. (1957). On accessory chromosomes inFostuca pratensis V. Influence of accessory chromosomes on fertility and vegetative development.Hereditas 43: 211–235.
Cameron, F. M. & H. Rees (1967). The influence ofB chromosomes on meiosis inLolium.Heredity 22: 446–450.
Darlington, C. D. (1934). The origin and behaviour of chiasmata III.Zea mays.Zeitschr. ind. Absl. Vererbungsl. 67: 96–114.
Darlington, C. D. (1956). Chromosome Botany. Allen and Unwin. London.
Frost, S. (1958). Studies on the genetical effects of accessory chromosomes inCentaurea scabiosa.Hereditas 44: 112–122.
Hanson, G. P. (1961). Alteration of recombination frequencies inA- byB-chromosomes.Maize-Genetics Co-operation Newsletter 35: 61.
Hanson, G. P. (1962). Crossing-over in Chromosome III as influenced byB-chromosomes.Maize-Genetics Co-operation Newsletter 36: 34.
John, B. & G. M. Hewitt (1965). TheB chromosome system ofMyrmeleotettix maculatus [Thunb.] I. Mechanics.Chromosoma 16: 548–578.
Jones, R. N. & H. Rees (1967). Genotypic control of chromosome behaviour in rye. XI. The influence ofB chromosomes upon meiosis.Heredity 22: 333–347.
Lewis, H. (1951). The origin of supernumerary chromosomes in natural populations ofClarkia elegans.Evolution 5: 142–157.
Lewis, K. R. & E. John. (1963). Chromosome Marker. Churchill, London.
Melander, Y. (1950). Accessory chromosomes in animals especiallyPolycelis tenuis.Hereditas 36: 19.
Moss, J. P. (1966). The adaptive significance ofB-chromosomes in rye.Chromosomes Today I: 15–23.
Müntzing, A. (1943). Genetical effects of duplicated fragment chromosomes in rye.Hereditas 29: 91–112.
Müntzing, A. (1954). Cytogenetics of accessory chromosomes (B-chromosomes).Proc. 9th Int. Cong. Genet. 282–301.
Müntzing, A. (1963). The effects of accessory chromosomes in diploid and tetraploid rye.Hereditas 49: 371–426.
Randolph, L. F. (1941). Genetic characteristics ofB chromosomes in maize.Genetics 26: 608–631.
Rhoades, M. M. (1950). Meiosis in maize.Jour. Heredity 41: 59–61.
Vosa, C. G. (1966). Seed germination andB chromosomes in the leek (Allium porrum).Chromosomes Today I: 24–27.
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Ayonoadu, U., Rees, H. The influence of B-chromosomes on chiasma frequencies in Black Mexican Sweet Corn. Genetica 39, 75–81 (1968). https://doi.org/10.1007/BF02324457
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DOI: https://doi.org/10.1007/BF02324457