'Lampbrush' Phase during Meiosis in a Species of Cletus (Coreidae: Heteroptera-Hemiptera)

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概要

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• The spermatogonial complement of the Cletus sp. is 17, and the mode of sex determination of this insect is XO: XX type. The chromosomes comprise of fourteen autosomes, a pair of m-chromosomes and an odd X-chromosome. The early diakinetic bivalents possess prominent lampbrush processes which persist to the end of diakinesis. These processes originate from the nucleoprotein matrix of the chromosomes and these form an integral part of the latter.Added in proof. The lampbrush formation in the chromosomes, it is contended (Sharma, G. P. and Ram Parshad, Nature, 180, p. 147, 1957), is bound up with depolymerisation of the nucleic acids, but it appears to be a mere speculation unsupported by any factual evidence, whatsoever.

• 財団法人 日本メンデル協会の論文

財団法人 日本メンデル協会 | 論文

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