First, we examine whether or not FW and EW are genetically negatively correlated across RIL. The other parental line was derived from an Australian population in Melbourne ( Norry et al. One parental line was derived from a sample of wild flies collected in Denmark. In this context, QTL-mapping should find genome regions (QTLs) linked to genes that determine the differences in FW and EW between the parental lines ( Lynch and Walsh 1998). As parental lines strongly differed in both FW and EW (with no significant difference in body size traits such as thorax length ), derived RIL are useful to find QTL that explain at least part of the genetic variation in head morphology between some populations. Here we present a QTL-based scan for size traits of head and eyes in a set of intercontinental recombinant inbred line (RIL) previously described in Norry et al. QTL for FW and EW might segregate in intercontinental crosses of D. melanogaster, a cosmopolitan species of Afrotropical origin. QTL for head and eye size remain to be studied in D.
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QTL mapping can also be used as one starting point for characterizing where some of the relevant loci may be found for negative genetic correlations between FW and EW on the basis of a full genome chromosomal scan in D. As a developmental constraint ( Wagner 1988), an increase in EW is associated with a reduction in the adjacent face cuticle affecting the head capsule in Drosophila ( Cowley and Atchley 1990, Norry et al. Variation in size of compound eyes is likely to influence vision. Mapping also the genetic basis of the intra-specific variation in FW and EW represents an opportunity to better understand the micro-evolutionary changes of these traits FW and EW within species ( Arif et al. QTL for these traits were recently identified for inter-specific differences between D rosophila simulans and Drosophila mauritiana ( Arif et al. This body part is largely produced by a single pair of imaginal discs, the “eye-antennal” discs ( Morota and Lawrence 1979), and two traits derived from this developmental precursor, face width (FW) and eye width (EW), are both negatively and pleiotropically correlated in D. One small body part which is interesting to explore using a genetic approach is the head capsule in the adult fly ( Cowley and Atchley 1990, Norry and Vilardi 1996, Norry et al. 2015), and only recently other body parts related in development have been QTL-mapped, but rather for inter-specific differences (e.g. 2003 Debat and Peronnet 2013), as well as for genitalia morphology (e.g. In Drosophila melanogaster, Quantitative Trait Loci (QTL) of morphometric traits have been identified for thorax and wing traits (e.g. Please allow ushers to assist with seating to ensure maximized spacing.In traits related to size of complex organs, genetic differences exist between individuals within populations as well as between populations within species. Patrons must provide a vaccine card and photo identification, and wear a mask. GOOD TO KNOW: Genesis Theatre follows all indoor event PHO safety protocols. Produced by The Delta Stageworks Artist Collective TICKETS AVAILABLE ONLY ONLINE BY GENERAL ADMISSIONįeaturing: Cameron Bancroft, Renee Iaci, Eric Keenleyside, Peg Keenleyside, Marilyn Norry, Sandra Patterson and (on Zoom) Vera Mayor, Lorne Patterson, Nick Keenleyside and Sam Bob From community interviews, local news events and the exploration of our own lived experiences of living through the monumental changes of this last year and a half, comes a multi-media theatrical evening of stories that follow the ups and downs, the laughs and the lows of the lockdown life we've all been experiencing since March 2020.
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A devised-theatre project created over the course of a year by the Delta Stageworks artist collective featuring a cast of both professional artists and community members. THEN & NOW, Pandemic Life Stories - A Staged Reading at Genesis Theatre, in Ladner, BC. THEN & NOW, Pandemic Life Stories - a devised-theatre project tracing the highs and the lows of lockdown life over the past 18 months.
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