| characterization and isolation of novel microsatellites from the drosophila dunni subgroup. | we have isolated and characterized 77 novel microsatellites from two species, drosophila dunni and drosophila nigrodunni, which are closely related caribbean-island endemics from the drosophila cardini species group. these species are very distantly related to all other drosophila from which microsatellites have previously been characterized. we find that the average length of microsatellites isolated in these species is quite small, with an overall mean length of 9.8 repeat units for dinucleoti ... | 2002 | 12688656 |
| drosophilid assemblages at different urbanization levels in the city of porto alegre, state of rio grande do sul, southern brazil. | the present study analyzed the drosophilid assemblages in different levels of urbanization in the city of porto alegre, rio grande do sul, brazil. collections were carried out in 2008 in three different environments: a highly urbanized area-"jardim botânico," a forested area with intermediary urbanization-"parque gabriel knijnik," and in a relatively well-preserved forested area, although threatened by the urban growth-"morro santana." in jardim botânico, 36 species belonging to four genera were ... | 2012 | 23950007 |
| molecular phylogeny of the drosophila tripunctata and closely related species groups (diptera: drosophilidae). | we suggest a new phylogenetic hypothesis for the tripunctata radiation based on sequences of mitochondrial genes. phylogenetic trees were reconstructed by parsimony, maximum likelihood and bayesian methods. we performed tests for hypotheses of monophyly for taxonomic groups and other specific hypotheses. results reject the monophyly for the tripunctata group whereas monophyly is not rejected for the tripunctata radiation and other specific groups within the radiation. although most of the basal ... | 2009 | 19285146 |
| a molecular study of the systematics of the drosophila tripunctata group and the tripunctata radiation. | | 2003 | 12927144 |
| altitudinal distribution of two sibling species of the drosophila tripunctata group in a preserved tropical forest and their male sterility thermal thresholds. | variation of ecophysiological traits may help to explain geographic distribution patterns of drosophila sibling species. many traits in ectotherms have optimal performance within specific temperature ranges. altitudinal gradients are potentially informative for characterizing differences of sibling species distributions. we collected two sibling species of the tripunctata group - drosophila mediopunctata (mpt) and d. unipunctata (uni) - at eight altitudes (ranging from 593 to 1185m above sea lev ... | 2018 | 29301702 |
| phylogenetic relationships and macro-evolutionary patterns within the drosophila tripunctata "radiation" (diptera: drosophilidae). | despite previous efforts, the evolutionary history of the immigrans-tripunctata clade remains obscure in part due to its hypothesized origin through a rapid radiation. we performed a supermatrix analysis (3,243 base pairs) coupled with richness patterns, environmental phylogenetic signal and radiation tests in order to address phylogenetic relationships and macro-evolutionary hypotheses within this complex group of species. we propose a well-supported evolutionary scenario for the immigrans-trip ... | 2010 | 20376692 |
| genetic population structure of drosophila tripunctata: patterns of variation and covariation of traits affecting resource use. | drosophila tripunctata is an ecological generalist, using both fruits and mushrooms as breeding sites. isofemale strains of this species were established from seven populations over a wide part of its range and assayed for electrophoretic variability, oviposition-site preference, and larval performance on several types of substrates. significant variation among strains within populations was found for oviposition-site preference, larval development time on tomatoes versus mushrooms, and toleranc ... | 1989 | 28564234 |
| genetics of oviposition-site preference in drosophila tripunctata. | a survey of 175 isofemale strains from seven populations of drosophila tripunctata showed that the preferences of females for mushrooms versus tomatoes as oviposition sites follow an approximately normal distribution among strains, as would be expected if this behaviour were governed by many genes with small, additive effects. however, crosses among several strains revealed the existence of autosomal genes with dominance and interaction effects having substantial influence on oviposition-site pr ... | 1987 | 3429258 |
| genetic complexity of host-selection behavior in drosophila. | genetic variation for settling responses to different types of food and for oviposition behavior exists within natural populations of drosophila tripunctata. after flies from two isofemale strains and f(2) derived from crosses between them were released in the wild and recaptured at either mushroom or tomato baits, the oviposition preferences of females for these foods were determined in the laboratory. whereas settling behavior and oviposition-site preference were negatively correlated in the p ... | 1986 | 16593679 |
| genetic and environmental determinants of food preference in drosophila tripunctata. | mark-release-recapture field experiments involving two isofemale strains of drosophila tripunctata revealed that strain identity strongly and consistently affected the preferences of both males and females for mushrooms versus tomatoes. females, but not males, showed an augmented preference for the type of food on which they had been kept prior to release. the behavior of f2 flies from reciprocal crosses between the two strains demonstrated that genetic variation for food preference is autosomal ... | 1985 | 28564210 |
| genetic variation for host preference within and among populations of drosophila tripunctata. | | 1983 | 28563549 |