| genetic analysis of drosophila sechellia specialization: oviposition behavior toward the major aliphatic acids of its host plant. | oviposition behavior of the four species in the drosophila melanogaster complex (d. melanogaster, d. simulans, d. mauritiana, d. sechellia) was investigated versus natural morinda fruit (the normal resource of d. sechellia) and the two major aliphatic acids of this fruit (hexanoic acid, c6, and octanoic acid, c8). two different experimental techniques were compared. when control and experimental food were set on the same egg laying plate, three species (d. sechellia, d. mauritiana, d. melanogast ... | 1998 | 9926614 |
| genetic basis of octanoic acid resistance in drosophila sechellia: functional analysis of a fine-mapped region. | drosophila sechellia is a species of fruit fly endemic to the seychelles islands. unlike its generalist sister species, d. sechellia has evolved to be a specialist on the host plant morinda citrifolia. this specialization is interesting because the plant's fruit contains secondary defence compounds, primarily octanoic acid (oa), that are lethal to most other drosophilids. although ecological and behavioural adaptations to this toxic fruit are known, the genetic basis for evolutionary changes in ... | 2017 | 28035709 |
| low allozyme and mtdna variability in the island endemic species drosophila sechellia (d. melanogaster complex). | genetic variability of d. sechellia is investigated at both mitochondrial and nuclear levels. the results reveal the existence of a single main type of mtdna with very few variants and a very low enzyme polymorphism. this situation is consistent with the small population size of this specialized species. | 1990 | 2153569 |
| microsatellite variation suggests a recent fine-scale population structure of drosophila sechellia, a species endemic of the seychelles archipelago. | drosophila sechellia is closely related to the cosmopolitan and widespread model species, d. simulans. this species, endemic to the seychelles archipelago, is specialized on the fruits of morinda citrifolia, and harbours the lowest overall genetic diversity compared to other species of drosophila. this low diversity is associated with a small population size. in addition, no obvious population structure has been evidenced so far across islands of the seychelles archipelago. here, a microsatellit ... | 2011 | 21761131 |