Abstract
IN Agriotes mancus Say, an elaterid beetle, two pairs of autosomes are distinctly longer than the rest of the chromosomes. In spermatogenesis these long, metacentric autosomes—here labelled L 1 and L 2—form bivalents which are easily recognizable during the mid-diplotenic – diakinetic stages by differences in their longitudinal structure. There are three kinds of allocyclic segments in these chromosomes, all of them negatively heteropycnotic: the unstainable procentric segment in both L 1 and L 2; a similar, but interstitial segment in L 2; and a third, less allocyclic segment between the other two in L 2.
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VIRKKI, N. High Chiasma Frequency in Allocyclic Segments of Chromosomes. Nature 181, 1148–1149 (1958). https://doi.org/10.1038/1811148a0
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DOI: https://doi.org/10.1038/1811148a0
