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Abstract
Wheat cultivars exposed to optimal photoperiod and vernalization treatments still exhibit differences in heading time. This variation, known as earliness per se (Eps), is important for the fine-tuning of flowering and the adaptation to different environments. We previously identified the Eps-Am1 locus from Triticum monococcum and showed that the allele from cultivated accession DV92 significantly delays flowering and increases the number of spikelets per [ver mas...]
dc.contributor.authorTranquilli, Gabriela
dc.contributor.authorLewis, Silvina
dc.contributor.authorKippes, Nestor
dc.contributor.authorDubcovsky, Jorge
dc.contributor.authorAlvarez, María Alejandra
dc.date.accessioned2017-11-08T11:41:21Z
dc.date.available2017-11-08T11:41:21Z
dc.date.issued2016-07
dc.identifier.issn1438-793X (Print)
dc.identifier.issn1438-7948 (Online)
dc.identifier.otherhttps://doi.org/10.1007/s10142-016-0490-3
dc.identifier.urihttp://hdl.handle.net/20.500.12123/1703
dc.identifier.urihttps://link.springer.com/article/10.1007%2Fs10142-016-0490-3
dc.description.abstractWheat cultivars exposed to optimal photoperiod and vernalization treatments still exhibit differences in heading time. This variation, known as earliness per se (Eps), is important for the fine-tuning of flowering and the adaptation to different environments. We previously identified the Eps-Am1 locus from Triticum monococcum and showed that the allele from cultivated accession DV92 significantly delays flowering and increases the number of spikelets per spike relative to the allele from wild accession G3116. We expanded a high-density genetic map and physical map of the Eps-Am1 region and identified the wheat ortholog of circadian clock regulator EARLY FLOWERING 3 (ELF3) as one of the candidate genes. No differences were found in ELF3 transcript levels between NILs carrying the DV92 and G3116 Eps-Am1 alleles, but the encoded ELF3 proteins differed in four amino acids. These differences were associated with altered transcription profiles of PIF-like, PPD1 and FT1, which are known downstream targets of ELF3. Tetraploid wheat lines with combined truncation mutations in the A- and B-genome copies of ELF3 flowered earlier and had less spikelets per spike than the wild type control under SD and LD conditions. Both effects were stronger in the photoperiod sensitive than the photoperiod insensitive background, indicating an epistatic interaction between PPD1 and ELF3. By contrast, the introgression of the T. monococcum chromosome segment carrying Eps-Am1-l allele from DV92 into durum wheat delayed flowering and increased the number of spikelets per spike in the field, providing a novel allele to modulate flowering time and spike development in wheat.eng
dc.formatapplication/pdf
dc.language.isoeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceFunctional & Integrative Genomics 16 (4) : 365–382 (July 2016)
dc.subjectTriticum Monococcum
dc.subjectTrigo
dc.subjectWheateng
dc.subjectFloración
dc.subjectFloweringeng
dc.subjectGenes
dc.titleGenetic and physical mapping of the earliness perse locus Eps - Am1 in Triticum monococcum identifies early flowering 3 (ELF3) as a candidate gene
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.description.origenInst. de Recursos Biológicos
dc.gic568
dc.description.filFil: Alvarez, María Alejandra. University of California. Department of Plant Sciences; Estados Unidos
dc.description.filFil: Tranquilli, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina
dc.description.filFil: Lewis, Silvina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina
dc.description.filFil: Kippes, Nestor. University of California. Department of Plant Sciences; Estados Unidos
dc.description.filFil: Dubcovsky, Jorge. University of California. Department of Plant Sciences; Estados Unidos. Howard Hughes Medical Institute; Estados Unidos
dc.subtypecientifico


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