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A Possible Effect of Heterochromatin on Chromosome Pairing
J. B. Thomas and P. J. Kaltsikes
Proceedings of the National Academy of Sciences of the United States of America
Vol. 71, No. 7 (Jul., 1974), pp. 2787-2790
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/63652
Page Count: 4
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Rye chromosomes were selectively stained in the meiosis of triticale by means of heterochromatin banding techniques. Compared to wheat chromosomes, rye chromosomes showed reduced pairing at first meiotic metaphase. Within the rye genome this pairing failure was associated with the presence of large, terminal heterochromatic bands. Since these terminal bands of rye chromosomes are late replicating, the effect of heterochromatin could arise from an overlap between the processes of chromosome replication and chromosome pairing.
Proceedings of the National Academy of Sciences of the United States of America © 1974 National Academy of Sciences