Further notes on the chromosomal polymorphism in natural populations of Drosophila in Hokkaido

概要

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In the former report (Toyofuku 1957) the author has dealt with twelve different kinds of salivary chromosomal aberrations found in Drosophila samples which were collected in 1955. Further investigations have revealed the occurrence of fourteen chromosomal aberrations in six species of Drosophila collected in 1956 from natural populations. Among them, nine types were found to occur in D. nigromaculata which were collected from five different localities, The remaining five types of aberrations were observed in the following five species: D. auraria, D. bifasciata, D. coracina, D. funebris and D. histrioides. The inversions occurring in D. immigrans and D. sordidula are of similar nature to those observed in 1955 by the author (Toyofuku 1957).
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