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Further studies on karyotypes and sex determination of phytoseiid mites (Acarina: Mesostigmata)

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Abstract

Chromosome studies were made on embryonic tissues of eggs of 15 species of predaceous mites of the family Phytoseiidae belonging to six genera: Amblyseius Berlese, Seiulus Berlese, Typhlodromus Scheuten, Phytoseiulus Evans, Phytoseius Ribaga and Paragigagnathus Amitai et Grinberg. In 14 species, the chromosome numbers n=4, 2n=8 were found. In cytological studies of post-embryonic stages based on these results, the haplo-diploid (arrhenotokous) mechanism was established. In the species Amblyseius deleoni Muma et Denmark, which was found to be thelytokous, only metaphases with 8 chromosomes were found.

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  1. Division of Entomology, Institute of Plant Protection, The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel

    M. Wysoki

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  1. M. Wysoki
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Wysoki, M. Further studies on karyotypes and sex determination of phytoseiid mites (Acarina: Mesostigmata). Genetica 44, 139–145 (1973). https://doi.org/10.1007/BF00155967

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  • DOI: https://doi.org/10.1007/BF00155967

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