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FRIZZY PANICLE drives supernumerary spikelets in bread wheat
Oxana Dobrovolskaya1, Caroline Pont2, Richard Sibout2
1Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia (O.D., Y.L.O., E.S., L.L.);Institut National de la Recherche Agronomique-Université Blaise Pascal Unité Mixte de Recherche-1095, 63100 Clermont-Ferrand cedex 2, France (Ca.P., F.M., A.C., V.G., Ch.P., J.S.);Institut National de la Recherche Agronomique, Unité Mixte de Recherche-1318, Institut Jean-Pierre Bourgin, Saclay Plant Sciences, F-78000 Versailles, France (R.S.); AgroParisTech, Institut Jean-Pierre Bourgin, RD10, F-78000 Versailles, France (R.S.);Agrotest Fyto, Ltd., 767 01 Kromeriz, Czech Republic (P.M.);Vavilov Institute of General Genetics, Russian Academy of Sciences, 3119333 Moscow, Russia (E.B.);College of Agriculture, Ibaraki University, 3-21-1 Chuuo, Ami, Inashiki, Ibaraki 300-0393, Japan (N.W.);Institut National de la Recherche Agronomique, Centre National de Ressources Génomiques Végétales, 31326 Castanet Tolosan cedex, France (E.P., N.G., H.B.);Novosibirsk State University, 630090 Novosibirsk, Russia (Y.O.); andCentral Siberian Botanical Garden, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia (A.A.K.) oxanad@bionet.nsc.ru jsalse@clermont.inra.fr.
Researchers identified the wheat FRIZZY PANICLE (FZP) gene, crucial for inflorescence architecture. Mutations in FZP, particularly WFZP-D, cause supernumerary spikelets (SSs), offering potential for increasing bread wheat yield.
Area of Science:
- Plant genetics
- Molecular biology
- Agricultural science
Background:
- Bread wheat (Triticum aestivum) typically has unbranched spikes with one spikelet per node.
- Mutants with supernumerary spikelets (SSs) are valuable for studying wheat inflorescence development and yield potential.
Purpose of the Study:
- To identify the genetic basis of the supernumerary spikelet (SS) trait in bread wheat.
- To characterize the role of the FRIZZY PANICLE (FZP) gene in regulating wheat inflorescence architecture.
Main Methods:
- Genetic characterization of unrelated wheat mutants exhibiting the SS trait.
- Structural and functional analysis of wheat FZP homoeologous genes (WFZP).
Main Results:
- Identification of the wheat FRIZZY PANICLE (FZP) gene, an APETALA2/Ethylene Response Factor transcription factor, as responsible for the SS trait.
- Coding mutations in WFZP-D were found to cause the SS phenotype, with enhanced effects when combined with WFZP-A mutations.
- WFZP-based resources were developed for potential genetic manipulation.
Conclusions:
- The wheat FZP gene plays a critical role in controlling inflorescence architecture.
- Understanding WFZP gene function provides a basis for improving bread wheat yield by increasing grain number through genetic modification.
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