GEPHE SUMMARY
Gephebase Gene
Entry Status
Published
GepheID
GP00000092
Main curator
Martin
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Petunia integrifolia
Trait State in Taxon B
Petunia axillaris
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Common Name
-
Synonyms
violet-flowered petunia; Petunia integrifolia (Hook.) Schinz & Thell., 1915
Rank
species
Lineage
Show more ... tina; Embryophyta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; eudicotyledons; Gunneridae; Pentapetalae; asterids; lamiids; Solanales; Solanaceae; Petunioideae; Petunia
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Common Name
-
Synonyms
large white petunia; white moon petunia; Petunia axillaris (Lam.) Britton, Stern & Poggenb.; Petunia axilliaris
Rank
species
Lineage
Show more ... tina; Embryophyta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; eudicotyledons; Gunneridae; Pentapetalae; asterids; lamiids; Solanales; Solanaceae; Petunioideae; Petunia
NCBI Taxonomy ID
is Taxon B an Infraspecies?
No
GENOTYPIC CHANGE
Generic Gene Name
AN2
Synonyms
-
String
-
Sequence Similarities
-
GO - Biological Process
-
GO - Cellular Component
UniProtKB
Petunia integrifolia
GenebankID or UniProtKB
Presumptive Null
Yes
Molecular Type
Aberration Type
Deletion Size
1-9 bp
Molecular Details of the Mutation
1bp deletion; premature stop
Experimental Evidence
Authors
Hoballah ME; Gübitz T; Stuurman J; Broger L; Barone M; Mandel T; Dell'Olivo A; Arnold M; et al. ... show more
Abstract
Animal-mediated pollination is essential in plant reproductive biology and is often associated with pollination syndromes, sets of floral traits, such as color, scent, shape, or nectar content. Selection by pollinators is often considered a key factor in floral evolution and plant speciation. Our aim is the identification and characterization of the genetic changes that caused the evolution of divergent pollination syndromes in closely related plant species. We focus on ANTHOCYANIN2 (AN2), a well-defined myb-type transcription factor that is a major determinant of flower color variation between Petunia integrifolia and Petunia axillaris. Analysis of sequence variation in AN2 in wild P. axillaris accessions showed that loss-of-function alleles arose at least five times independently. DNA sequence analysis was complemented by functional assays for pollinator preference using genetic introgressions and transgenics. These results show that AN2 is a major determinant of pollinator attraction. Therefore, changes in a single gene cause a major shift in pollination biology and support the notion that the adaptation of a flowering plant to a new pollinator type may involve a limited number of genes of large effect. Gene identification and analysis of molecular evolution in combination with behavioral and ecological studies can ultimately unravel the evolutionary genetics of pollination syndromes.
Additional References
RELATED GEPHE
Related Genes
Related Haplotypes
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