Natural Variation in Hd17, a Homolog of Arabidopsis ELF3 That is Involved in Rice Photoperiodic Flowering

Matsubara, Kazuki; Ogiso‐Tanaka, Eri; Hori, Kiyosumi; Ebana, Kaworu; Ando, Tsuyu; Yano, Masahiro

doi:10.1093/pcp/pcs028

Cited by 183 publications

(156 citation statements)

References 34 publications

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“…The discovery that bulb formation is induced by the downregulation of AcFT4 and the upregulation of AcFT1 in response to LD photoperiods provides the molecular tools to investigate the difference between SD-, intermediate-and LD onion varieties (note: unlike SD flowering that requires days to be shorter than a critical length for flowering, all onions bulb when the daylength is longer than a critical length). Molecular genetic analysis in a wide range of plants has revealed that sequence changes in components of the circadian clock [48][49][50][51] and downstream components 51 , including FT genes 52,53 , underlie the variation in daylength required to induce flowering. It is therefore likely that the adaptation of onions to bulb at the appropriate time in different latitudes involves similar mechanisms.…”

Section: Resultsmentioning

confidence: 99%

FLOWERING LOCUS T genes control onion bulb formation and flowering

et al. 2013

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Onion (Allium cepa L.) is a biennial crop that in temperate regions is planted in the spring and, after a juvenile stage, forms a bulb in response to the lengthening photoperiod of late spring/ summer. The bulb then overwinters and in the next season it flowers and sets seed. FLOWERING LOCUS T (FT) encodes a mobile signaling protein involved in regulating flowering, as well as other aspects of plant development. Here we show that in onions, different FT genes regulate flowering and bulb formation. Flowering is promoted by vernalization and correlates with the upregulation of AcFT2, whereas bulb formation is regulated by two antagonistic FT-like genes. AcFT1 promotes bulb formation, while AcFT4 prevents AcFT1 upregulation and inhibits bulbing in transgenic onions. Long-day photoperiods lead to the downregulation of AcFT4 and the upregulation of AcFT1, and this promotes bulbing. The observation that FT proteins can repress and promote different developmental transitions highlights the evolutionary versatility of FT.

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Section: Resultsmentioning

confidence: 99%

FLOWERING LOCUS T genes control onion bulb formation and flowering

et al. 2013

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“…QTLs with relatively large effects were co-located with Four QTLs for HD were detected on chromosomes 3, 6, and 7 (Table 3 and Figure 2). QHD3 and qHD6.1 were located in the same marker intervals as the HD genes HD16 and HD17, respectively (Matsubara et al, 2012;Hori et al, 2013). Three QTLs for PH were detected on chromosomes 1, 6, and 12.…”

Section: Qtl Identificationmentioning

confidence: 90%

Analysis of QTLs for panicle exsertion and its relationship with yield and yield-related traits in rice (Oryza sativa L.)

Zhao¹,

Chen²,

QingYong³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Panicle exsertion (PE) is an important morphological trait that is closely associated with spikelet fertility and grain yield. To understand the genetic basis of PE and its relationships with yield and yield-related traits, a recombinant inbred population consisting of 240 lines derived from a cross between an Indica cultivar 'Kasalath' and a Japonica germplasm 'TD70', was studied over two years. PE was significantly correlated with plant height, heading date (HD), panicle length (PL), and panicle characteristics such as primary branch number, spikelet number per panicle, and spikelet density, but showed poor correlation with yield components. Based on linkage mapping of 141 SSR markers, a total of 38 quantitative trait loci (QTLs) were located for 12 investigated traits, with the contribution varying from 6.51 to 8.61%. Among these, four QTL clusters were identified on chromosomes 1, 2, 3, and 6, suggesting the existence of pleiotropic alleles. In some intervals, two loci for PE were collocated with several traits, which is consistent with the correlations observed with phenotypic variations. The PE QTLs with 'Kasalath' alleles and without pleiotropic effects would be valuable for the improvement of PE in 'TD70' and in other rice varieties.

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“…The circadian-clock component OsELF3-1 / Hd17 / Early flowering 7 ( Ef7 ) participates in regulation of rice photoperiodic flowering through Ehd1 and Ghd7 (72, 98, 133) ( Figure 4a ). Disruption of OsELF3-1 / Hd17 / Ef7 function causes elevated expression of Ghd7 in both long and short days, resulting in reduced Ehd1 and Hd3a expression (98, 133).…”

Section: Photoperiodic Flowering In Ricementioning

confidence: 99%

Photoperiodic Flowering: Time Measurement Mechanisms in Leaves

Song

Shim

Kinmonth-Schultz

et al. 2015

Annu. Rev. Plant Biol.

532

553

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Many plants use information about changing day length (photoperiod) to align their flowering time with seasonal changes to increase reproductive success. A mechanism for photoperiodic time measurement is present in leaves, and the day-length-specific induction of the FLOWERING LOCUS T (FT) gene, which encodes florigen, is a major final output of the pathway. Here, we summarize the current understanding of the molecular mechanisms by which photoperiodic information is perceived in order to trigger FT expression in Arabidopsis as well as in the primary cereals wheat, barley, and rice. In these plants, the differences in photoperiod are measured by interactions between circadian-clock-regulated components, such as CONSTANS (CO), and light signaling. The interactions happen under certain day length conditions, as previously predicted by the external coincidence model. In these plants, the coincidence mechanisms are governed by multilayered regulation with numerous conserved as well as unique regulatory components, highlighting the breadth of photoperiodic regulation across plant species.

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Natural Variation in Hd17, a Homolog of Arabidopsis ELF3 That is Involved in Rice Photoperiodic Flowering

Cited by 183 publications

References 34 publications

FLOWERING LOCUS T genes control onion bulb formation and flowering

FLOWERING LOCUS T genes control onion bulb formation and flowering

Analysis of QTLs for panicle exsertion and its relationship with yield and yield-related traits in rice (Oryza sativa L.)

Photoperiodic Flowering: Time Measurement Mechanisms in Leaves

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