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Zebularine treatment is associated with deletion of FT-B1 leading to an increase in spikelet number in bread wheat.
Finnegan, E Jean; Ford, Brett; Wallace, Xiaomei; Pettolino, Filomena; Griffin, Patrick T; Schmitz, Robert J; Zhang, Peng; Barrero, Jose M; Hayden, Matthew J; Boden, Scott A; Cavanagh, Colin A; Swain, Steve M; Trevaskis, Ben.
Afiliación
  • Finnegan EJ; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Ford B; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Wallace X; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Pettolino F; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Griffin PT; Department of Genetics, University of Georgia, Athens, GA, 30602, USA.
  • Schmitz RJ; Department of Genetics, University of Georgia, Athens, GA, 30602, USA.
  • Zhang P; Plant Breeding Institute, School of Life and Environmental Sciences, University of Sydney, Cobbitty, New South Wales, 2570, Australia.
  • Barrero JM; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Hayden MJ; Agriculture Victoria Research, Agribio Center, Bundoora, Victoria, 3083, Australia.
  • Boden SA; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Cavanagh CA; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Swain SM; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
  • Trevaskis B; CSIRO Agriculture and Food, Canberra, ACT, 2601, Australia.
Plant Cell Environ ; 41(6): 1346-1360, 2018 06.
Article en En | MEDLINE | ID: mdl-29430678
The number of rachis nodes (spikelets) on a wheat spike is a component of grain yield that correlates with flowering time. The genetic basis regulating flowering in cereals is well understood, but there are reports that flowering time can be modified at a high frequency by selective breeding, suggesting that it may be regulated by both epigenetic and genetic mechanisms. We investigated the role of DNA methylation in regulating spikelet number and flowering time by treating a semi-spring wheat with the demethylating agent, Zebularine. Three lines with a heritable increase in spikelet number were identified. The molecular basis for increased spikelet number was not determined in 2 lines, but the phenotype showed non-Mendelian inheritance, suggesting that it could have an epigenetic basis. In the remaining line, the increased spikelet phenotype behaved as a Mendelian recessive trait and late flowering was associated with a deletion encompassing the floral promoter, FT-B1. Deletion of FT-B1 delayed the transition to reproductive growth, extended the duration of spike development, and increased spikelet number under different temperature regimes and photoperiod. Transiently disrupting DNA methylation can generate novel flowering behaviour in wheat, but these changes may not be sufficiently stable for use in breeding programs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Triticum / Pan / Genes de Plantas / Eliminación de Gen / Citidina Tipo de estudio: Risk_factors_studies Idioma: En Revista: Plant Cell Environ Asunto de la revista: BOTANICA Año: 2018 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Triticum / Pan / Genes de Plantas / Eliminación de Gen / Citidina Tipo de estudio: Risk_factors_studies Idioma: En Revista: Plant Cell Environ Asunto de la revista: BOTANICA Año: 2018 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Estados Unidos