GEPHE SUMMARY Print
Entry Status
Published
GepheID
GP00001539
Main curator
Prigent
PHENOTYPIC CHANGE
Trait Category
Trait
Trait State in Taxon A
Daphnia magna from Germany
Trait State in Taxon B
Daphnia magna from Finland
Ancestral State
Unknown
Taxonomic Status
Taxon A
Latin Name
Common Name
-
Synonyms
Daphnia magna Straus, 1820
Rank
species
Lineage
Show more ... Metazoa; Eumetazoa; Bilateria; Protostomia; Ecdysozoa; Panarthropoda; Arthropoda; Mandibulata; Pancrustacea; Crustacea; Branchiopoda; Phyllopoda; Diplostraca; Cladocera; Anomopoda; Daphniidae; Daphnia
NCBI Taxonomy ID
is Taxon A an Infraspecies?
Yes
Taxon A Description
Daphnia magna from Germany
Taxon B
Latin Name
Common Name
-
Synonyms
Daphnia magna Straus, 1820
Rank
species
Lineage
Show more ... Metazoa; Eumetazoa; Bilateria; Protostomia; Ecdysozoa; Panarthropoda; Arthropoda; Mandibulata; Pancrustacea; Crustacea; Branchiopoda; Phyllopoda; Diplostraca; Cladocera; Anomopoda; Daphniidae; Daphnia
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
Daphnia magna from Finland
GENOTYPIC CHANGE
Generic Gene Name
RHO
Synonyms
RP4; OPN2; CSNBAD1
Sequence Similarities
Belongs to the G-protein coupled receptor 1 family. Opsin subfamily.
UniProtKB
Homo sapiens
GenebankID or UniProtKB
Presumptive Null
Molecular Type
Aberration Type
Molecular Details of the Mutation
unknown
Experimental Evidence
Authors
Roulin AC; Bourgeois Y; Stiefel U; Walser JC; Ebert D
Abstract
Diapause is an adaptation that allows organisms to survive harsh environmental conditions. In species occurring over broad habitat ranges, both the timing and the intensity of diapause induction can vary across populations, revealing patterns of local adaptation. Understanding the genetic architecture of this fitness-related trait would help clarify how populations adapt to their local environments. In the cyclical parthenogenetic crustacean Daphnia magna, diapause induction is a phenotypic plastic life history trait linked to sexual reproduction, as asexual females have the ability to switch to sexual reproduction and produce resting stages, their sole strategy for surviving habitat deterioration. We have previously shown that the induction of resting stage production correlates with changes in photoperiod that indicate the imminence of habitat deterioration and have identified a Quantitative Trait Locus (QTL) responsible for some of the variation in the induction of resting stages. Here, new data allows us to anchor the QTL to a large scaffold and then, using a combination of a new mapping panel, targeted association mapping and selection analysis in natural populations, to identify candidate genes within the QTL. Our results show that variation in a rhodopsin photoreceptor gene plays a significant role in the variation observed in resting stage induction. This finding provides a mechanistic explanation for the link between diapause and day-length perception that has been suggested in diverse arthropod taxa.

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Additional References
RELATED GEPHE
Related Genes
No matches found.
Related Haplotypes
No matches found.
EXTERNAL LINKS
COMMENTS
@GxE @SexualTrait - 1 SNP located in the middle of the intron explained 11% of the variance in resting stage production
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