Abstract
In a recent paper1, I have described four heterochromatic accessory chromosomes of a very small type in the moss Grimmia Mühlenbeckii Schimp. Further investigations on meiosis in mosses have revealed five accessory chromosomes of the same type in a population of Dicranum majus Turn. found near the State Horticultural Institute in south-west Finland. In their behaviour the accessories resemble in many respects those found in Grimmia. Besides being small, they are heterochromatic and incapable of conjugating with the normal chromosomes though, however, conjugating freely with one another.
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References
Vaarama, A., Portug. Acta Biol., (A), Goldschmidt Vol., 47 (1949).
Vaarama, A., [Bot. Not., 133 (1950)].
Östergren, G., Hereditas, 33, 263 (1947).
Müntzing, A., Hereditas, 30, 213 (1944).
Darlington, C. D., J. Genet., 39, 351 (1940).
Müntzing, A., Hereditas, 29, 91 (1943)
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VAARAMA, A. Accessory Isochromosomes in the Moss Dicranum majus. Nature 165, 894–895 (1950). https://doi.org/10.1038/165894a0
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DOI: https://doi.org/10.1038/165894a0
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