Abstract Background The Drosophila wing represents a particularly appropriate model to investigate the developmental control of phenotypic variation. Previous studies which aimed identify candidate genes for morphology demonstrated that genetic basis shape variation in D. melanogaster is composed numerous factors causing small, additive effects. In this study, we analyzed males and females from 191 lines , homozygous single P -element insertion, using geometric morphometrics techniques....

The rapid evolution of genital morphology is a fascinating feature that accompanies many speciation events. However, the underlying patterns and explanatory processes remain to be settled. In this work we investigate intraspecific variation interspecific divergence in male genitalic (size shape) cactophilic sibling species Drosophila buzzatii D. koepferae. Genital hybrids was examined compared corresponding parental lines. Despite being siblings, koepferae showed contrasting morphological...

Understanding the genetic architecture of ecologically relevant adaptive traits requires contribution developmental and evolutionary biology. The time to reach age reproduction is a complex life history trait commonly known as time. In particular, in holometabolous insects that occupy ephemeral habitats, like fruit flies, impact on fitness further exaggerated. present work one first systematic studies basis time, which we also evaluate environmental variation expression trait. We analyzed...

The present study first addressed the question of whether developmental time (DT) and viability (VT) vary clinally along latitudinal altitudinal gradients in Drosophila buzzatii, an autochthonous specialist generalist invasive melanogaster. Coincident positive clines across species and, direct inverse were observed for DT D. melanogaster respectively. Opposing detected VT only patterns prompted us to investigate flies living at lowland highland environments may respond differentially thermal...

Abstract Most animals depend on olfaction for survival and procreation. Odor-guided behavior is a quantitative trait, with phenotypic variation due to multiple segregating trait loci (QTL). Despite its profound biological importance, the genetic basis of naturally occurring in olfactory remains unexplored. Here, we mapped single Drosophila QTL affecting avoidance response benzaldehyde, using population recombinant inbred lines. Deficiency complementation mapping resolved this region into one...

Abstract Inversion polymorphisms in the second and fourth chromosomes of cactophilic Drosophila buzzatti native distribution range species are described. Over 5,000 flies from 26 localities were scored revealing interesting geographic structuring arrangement frequencies. Multiple regression partial correlation approaches showed that frequencies chromosome arrangements vary clinically along latitudinal altitudinal gradients to a lesser extent with longitude. Although many non selective...

Drosophila buzzatii and D. koepferae are two sibling species that breed on the necrotic tissues of several cactus show a certain degree niche overlap. Also, they differences in life history traits, such as body size developmental time, which probably evolved consequence adaptation to different host plants. In this work we investigate ecological genetic factors affecting wing morphology variation both within between species. Three traits were scored, distal proximal length width isofemale...

The present study reports new presences of Drosophila suzukii (Matsumura, 1931) (Diptera: Drosophilidae) in four localities Argentina, extending its geographical range South America. Among the records, one is located Mesopotamia region eastern where flies were captured around orange and mulberry orchards. other record at Ticucho, Province Tucumán, northwest from previous record, collected an unknown host, possibly Opuntia cactus. two captures D. performed raspberries plantations Patagonia...

Abstract We tested for the occurrence of oviposition acceptance different media prepared with cactus tissues three alternative hosts: Opuntia sulphurea, O. quimilo and Trichocereus terschekii 4 consecutive days in lines two Drosophila buzzatii populations one population D. koepferae. Our results showed that former laid significantly more eggs on both cacti than T. terschekii, whereas koepferae preferred terschekii. In addition, fecundity schedules differed between species: similar numbers...

The genetic and ecological basis of viability developmental time differences between Drosophila buzzatii D. koepferae were analysed using the isofemale line technique. Several lines sampled from pairs allopatric/sympatric populations each species. Flies reared in media prepared with decaying tissues two main natural cactus hosts This experimental design enabled us to evaluate relative contribution phenotypic plasticity, variation genotype by environment interaction (G x E) total for fitness...

Abstract Many biotic and abiotic variables influence the dispersal distribution of organisms. Temperature has a major role in determining these patterns because it changes daily, seasonally spatially, fluctuations have significant impact on an organism's behaviour fitness. Most ecologically relevant phenotypes that are adaptive also complex thus they influenced by many underlying loci interact with environment. In this study, we quantified degree thermal phenotypic plasticity within among...

Understanding the genetic architecture of any quantitative trait requires identifying genes involved in its expression different environmental conditions. This goal can be achieved by mutagenesis screens genetically tractable model organisms such as Drosophila melanogaster. Temperature during ontogenesis is an important factor affecting development and phenotypic variation holometabolous insects. In spite importance plasticity genotype environment interaction (GEI) for fitness related...

Odour-guided behaviour is a quantitative trait determined by many genes that are sensitive to gene-environment interactions. Different natural populations likely experience different selection pressures on the genetic underpinnings of chemosensory behaviour. However, few studies have reported comparisons basis olfactory in geographically distinct populations. We generated isofemale lines Drosophila melanogaster from six Argentina and measured larval adult responses benzaldehyde. There was...

In this study we present the results of an analysis differential longevity associated with Drosophila buzzatii second chromosome inversion karyotypes based on assessment more than 1000 individuals collected in a natural population. Comparisons frequencies between emerged and bait-collected flies showed not only that arrangements were longevity, but also selection was sex specific. Because each individual fly scored for thorax length karyotype, able to show favoring larger coupled average...

Summary The adaptive significance of the chromosomal polymorphism Drosophila buzzati has been studied by means fitness component analysis in an original population from Argentina. results show evidence selection acting through pupal viability, longevity (adult viability) and fecundity on second chromosome polymorphism, viability virility fourth polymorphism. Changes inversion frequencies throughout life‐cycle suggested endocyclic pattern directional selection, which at first seems to be only...