Artigo Acesso aberto

Observations on Geographic and Temporal Variations in the Ladybeetle Harmonia. II

1969; Japan Academy; Volume: 45; Issue: 4 Linguagem: Inglês

10.2183/pjab1945.45.289

ISSN

0021-4280

Autores

Taku KOMAI, Masuho CHINO,

Tópico(s)

Plant Reproductive Biology

Resumo

The presence or absence of a small elytral ridge in the ladybeetle Harmonia is controlled by a pair of alleles, that for the presence behaving as a simple dominant with a fairly high penetrance. There is a geographic gradient passing through the Japanese island chain in the frequencies of these genes. Significant temporal variations in the frequencies of the genes were observed in samples obtained at Suwa-Tatuno in Nagano Prefecture and at Hukuoka in Kyushu. The rates of temporal changes as well as the geographic gradient, suggest that the pertinent locus is of the heterotic type.

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