| adaptation of circadian neuronal network to photoperiod in high-latitude european drosophilids. | the genus drosophila contains over 2,000 species that, stemming from a common ancestor in the old world tropics, populate today very different environments [1, 2] (reviewed in [3]). we found significant differences in the activity pattern of drosophila species belonging to the holarctic virilis group, i.e., d. ezoana and d. littoralis, collected in northern europe, compared to that of the cosmopolitan d. melanogaster, collected close to the equator. these behavioral differences might have been o ... | 2017 | 28262491 |
| the structure and evolution of cis-regulatory regions: the shavenbaby story. | in this paper, we provide a historical account of the contribution of a single line of research to our current understanding of the structure of cis-regulatory regions and the genetic basis for morphological evolution. we revisit the experiments that shed light on the evolution of larval cuticular patterns within the genus drosophila and the evolution and structure of the shavenbaby gene. we describe the experiments that led to the discovery that multiple genetic changes in the cis-regulatory re ... | 2013 | 24218640 |
| conserved regulatory architecture underlies parallel genetic changes and convergent phenotypic evolution. | similar morphological, physiological, and behavioral features have evolved independently in different species, a pattern known as convergence. it is known that morphological convergence can occur through changes in orthologous genes. in some cases of convergence, cis-regulatory changes generate parallel modifications in the expression patterns of orthologous genes. our understanding of how changes in cis-regulatory regions contribute to convergence is hampered, usually, by a limited understandin ... | 2012 | 23197832 |
| drosophila ezoana uses an hour-glass or highly damped circadian clock for measuring night length and inducing diapause. | insects inhabiting the temperate zones measure seasonal changes in day or night length to enter the overwintering diapause. diapause induction occurs after the duration of the night exceeds a critical night length (cnl). our understanding of the time measurement mechanisms is continuously evolving subsequent to bünning's proposal that circadian systems play the clock role in photoperiodic time measurement (bünning, 1936). initially, the photoperiodic clocks were considered to be either based on ... | 2016 | 27867253 |
| resolving the phylogenetic relationships and evolutionary history of the drosophila virilis group using multilocus data. | the drosophila virilis group is one of the major lineages of drosophila previously recognised and it has been used as a model for different types of studies. it comprises 13 species whose phylogenetic relationships are not well resolved. in the present study, six nuclear genes (adh, fused, gpdh, nona, cg9631 and cg7219) and the mitochondrial ribosomal rna genes (12s-16s) have been used to estimate the evolutionary tree of the group using different methods of phylogenetic reconstruction. differen ... | 2011 | 21571080 |