GEPHE SUMMARY Print
Gephebase Gene
Entry Status
Published
GepheID
GP00000488
Main curator
Martin
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Hordeum vulgare
Trait State in Taxon B
Hordeum vulgare - Hooded
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Common Name
-
Synonyms
barley; Hordeum vulgare L.; Horedum vulgare
Rank
species
Lineage
Show more ... yta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; Liliopsida; Petrosaviidae; commelinids; Poales; Poaceae; BOP clade; Pooideae; Triticodae; Triticeae; Hordeinae; Hordeum
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Common Name
-
Synonyms
barley; Hordeum vulgare L.; Horedum vulgare
Rank
species
Lineage
Show more ... yta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; Liliopsida; Petrosaviidae; commelinids; Poales; Poaceae; BOP clade; Pooideae; Triticodae; Triticeae; Hordeinae; Hordeum
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
Hordeum vulgare - Hooded
GENOTYPIC CHANGE
Generic Gene Name
KNOX3
Synonyms
K
String
-
Sequence Similarities
Belongs to the TALE/KNOX homeobox family.
GO - Cellular Component
UniProtKB
Hordeum vulgare
GenebankID or UniProtKB
Presumptive Null
No
Molecular Type
Aberration Type
Insertion Size
100-999 bp
Molecular Details of the Mutation
305bp duplication in intron 4
Experimental Evidence
Authors
Müller KJ; Romano N; Gerstner O; Garcia-Maroto F; Pozzi C; Salamini F; Rohde W
Abstract
In barley (Hordeum vulgare L.) the unit of inflorescence is the spikelet, which bears a fertile bract, the lemma, and the floret consisting of palea, two lodicules, three stamens and the pistil. The Hooded mutation causes the appearance of an extra flower of inverse polarity on the lemma. This phenotype is governed by the single dominant genetic locus K3. Here we show that the homeobox gene Knox3 represents this locus. Ectopic Knox3 gene expression in the primordium of the extra floret is caused by a 305-base pair duplication in intron 4, and phenocopies of the mutation are obtained in the heterologous tobacco system by Knox3 overexpression. It is concluded that homeotic genes of the Knox gene family are involved in floral evocation. Furthermore, the study of polarity of reproductive organs in K and related mutants can now focus on homeobox genes.
Additional References
RELATED GEPHE
Related Genes
No matches found.
Related Haplotypes
No matches found.
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