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Search: authors:"Masanori J. Toda"

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A revision of the subgenus Dudaica Strand of the genus Drosophila Fallén, with descriptions of six new species (Diptera, Drosophilidae)

The subgenus Dudaica Strand of the genus Drosophila Fallén has been known to comprise only two species: Drosophila (Dudaica) senilis Duda, 1926 (recorded from Indonesia, Philippines, Vietnam, Bhutan, and India) and D. malayana (Takada, 1976) (recorded from Malaysia). In the present study, this subgenus is revised, with D. malayana redescribed and six new species discovered and...

Phylogeography of the Subgenus Drosophila (Diptera: Drosophilidae): Evolutionary History of Faunal Divergence between the Old and the New Worlds

The current subgenus Drosophila (the traditional immigrans-tripunctata radiation) includes major elements of temperate drosophilid faunas in the northern hemisphere. Despite previous molecular phylogenetic analyses, the phylogeny of the subgenus Drosophila has not fully been resolved: the resulting trees have more or less varied in topology. One possible factor for such ambiguous...

Host resistance does not explain variation in incidence of male-killing bacteria in Drosophila bifasciata

Background Selfish genetic elements that distort the sex ratio are found widely. Notwithstanding the number of records of sex ratio distorters, their incidence is poorly understood. Two factors can prevent a sex ratio distorter from invading: inability of the sex ratio distorter to function (failure of mechanism or transmission), and lack of drive if they do function...