<i>GIGANTEA‐</i>like genes control seasonal growth cessation in <i>Populus</i>

Ding, Jiajia; Böhlenius, Henrik; Rühl, Mark; Chen, Peng; Sane, Shashank; Zambrano, José Alfredo; Zheng, Bo; Eriksson, Maria E.; Nilsson, Ove

doi:10.1111/nph.15087

Cited by 65 publications

(80 citation statements)

References 68 publications

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“…It is also involved in numerous physiological processes, mediating rhythmic, phytochrome B signalling, carbohydrate metabolism and cold stress response [55]. Ding et al have described the identification of the Populus (poplar) orthologs of GI and their critical role in short-day-induced growth cessation and concluded that GI controls seasonal growth cessation in Populus [56]. In our study, GI may have played an important role in the photoperiodic control of growth cessation in E. ulmoides.…”

Section: Candidate Genes For Qtlssupporting

confidence: 54%

Update of Genetic Linkage Map and QTL Analysis for Growth Traits in Eucommia ulmoides Oliver

Jin

et al. 2020

Forests

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Eucommia ulmoides (Tu-chung) is an economically and ecologically important tree species which has attracted worldwide attention due to its application in pharmacology, landscaping, wind sheltering and sand fixation. Molecular marker technologies can elucidate the genetic mechanism and substantially improve the breeding efficiency of E. ulmoides. The current research updated the original linkage map, and quantitative trait loci (QTL) analysis was performed on tree growth traits measured over 10 consecutive years in an E. ulmoides F1 population (“Xiaoye” × “Qinzhong No.1”). In total, 452 polymorphic markers were scored from 365 simple sequence repeat (SSR) primers, with an average of 1.24 polymorphic markers per primer combination. The integrated map was 1913.29 cM (centimorgan) long, covering 94.10% of the estimated genome and with an average marker density of 2.20 cM. A total of 869 markers were mapped into 19 major independent linkage groups. Growth-related traits measured over 10 consecutive years showed a significant correlation, and 89 hypothetical QTLs were forecasted and divided into 27 distinct loci. Three traits for tree height, ground diameter and crown diameter detected 25 QTLs (13 loci), 32 QTLs (17 loci) and 15 QTLs (10 loci), respectively. Based on BLASTX search results in the NCBI database, six candidate genes were obtained. It is important to explore the growth-related genetic mechanism and lay the foundation for the genetic improvement of E. ulmoides at the molecular level.

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Section: Candidate Genes For Qtlssupporting

confidence: 54%

Update of Genetic Linkage Map and QTL Analysis for Growth Traits in Eucommia ulmoides Oliver

Jin

et al. 2020

Forests

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“…At the molecular level, there is evidence of cooption or cross talk between Arabidopsis flowering/seed dormancy pathways and the regulation of bud set in Populus, as well as in other plant species (25)(26)(27)(28). Such shared pathways revealed the importance of the phytohormone abscisic acid (ABA) (29,30) as well as components of the CONSTANS/FLOWERING LOCUS T (FT) regulatory module (25,31,32) and GIGANTEA (GI)-like genes (33). Recent studies described a key component of bud break in hybrid aspen: the transcription factor SHORT VEGETATIVE PHASE-LIKE (SVL), closely related to Arabidopsis floral repressor SHORT VEGETATIVE PHASE and its downstream target TCP18, a tree homolog of a branching regulator in Arabidopsis (34).…”

Section: Significancementioning

confidence: 99%

A comprehensive genomic scan reveals gene dosage balance impacts on quantitative traits inPopulustrees

Bastiaanse

Zinkgraf

Canning

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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Gene dosage variation and the associated changes in gene expression influence a wide variety of traits, ranging from cancer in humans to yield in plants. It is also expected to affect important traits of ecological and agronomic importance in forest trees, but this variation has not been systematically characterized or exploited. Here we performed a comprehensive scan of the Populus genome for dosage-sensitive loci affecting quantitative trait variation for spring and fall phenology and biomass production. The study population was a large collection of clonally propagated F1 hybrid lines of Populus that saturate the genome 10-fold with deletions and insertions (indels) of known sizes and positions. As a group, the phenotypic means of the indel lines consistently differed from control nonindel lines, with an overall negative effect of both insertions and deletions on all biomass-related traits but more diverse effects and an overall wider phenotypic distribution of the indel lines for the phenology-related traits. We also investigated the correlation between gene dosage at specific chromosomal locations and phenotype, to identify dosage quantitative trait loci (dQTL). Such dQTL were detected for most phenotypes examined, but stronger effect dQTL were identified for the phenology-related traits than for the biomass traits. Our genome-wide screen for dosage sensitivity in a higher eukaryote demonstrates the importance of global genomic balance and the impact of dosage on life history traits.

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“…It plays a role in control of circadian rhythm in Arabidopsis 31 . Furthermore it coordinates both photoperiod-mediated and independent flowering 32,33 , growth cessation 34 , carbohydrate metabolism 35 , salt tolerance 36 and cold stress response 37 . GI also affects hypocotyl growth in Arabidopsis 38,39 , and this function is related to gibberellin signaling, as SPINDLY (SPY) protein, a negative regulator of gibberellin signaling in Arabidopsis and an inhibitor of hypocotyl elongation, interacts with GI protein 39 .…”

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confidence: 99%

The clock gene Gigantea 1 from Petunia hybrida coordinates vegetative growth and inflorescence architecture

Brandoli

Petri

Egea‐Cortines

et al. 2020

Sci Rep

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the gene GIGANTEA (GI) appeared early in land plants. it is a single copy gene in most plants and is found in two to three copies in Solanaceae. We analyzed the silencing of one GI copy, Petunia hybrida GI1 (PhGI1), by hairpin RNAs in Petunia in order to gain knowledge about its range of functions. Decreased transcript levels of PhGI1 were accompanied also by a reduction of PhGI2. They were further associated with increased time period between two consecutive peaks for PhGI1 and CHANEL (PhCHL), the orthologue of the blue light receptor gene ZEITLUPE (ZTL), confirming its role in maintaining circadian rhythmicity. Silenced plants were bigger with modified internode length and increased leaf size while flowering time was not altered. We uncovered a new function for PhGI1 as silenced plants showed reduction of flower bud number and the appearance of two flower buds in the bifurcation point, were normally one flower bud and the inflorescence meristem separate. Furthermore, one of the flower buds consistently showed premature flower abortion. Flowers that developed fully were significantly smaller as a result of decreased cell size. Even so the circadian pattern of volatile emission was unchanged in the silenced lines, flowers emitted 20% less volatiles on fresh weight basis over 24 hours and showed changes in the scent profile. Our results indicate a novel role of PhGI1 in the development of reproductive organs in Petunia. PhGI1 therefore represses growth in vegetative plant parts, maintains the typical cymose inflorescence structure, and inhibits premature flower abortion. The evolution of land plants has included amongst other adaptations the increase in complexity of the circadian clock. Predictable changes in the environment, as light and temperature, are anticipated by the plant circadian clock, which allows them to adjust their developmental and physiological traits. Most detailed studies on plant circadian clock have been performed in Arabidopsis thaliana 1. The plant circadian clock is based on a set of genes forming several overlapping loops interacting with each other via transcriptional and post-translational activation and repression 2. Based on the time of the day when the mRNA of the gene shows its expression maximum, the genes included in this oscillator have been classified as the morning loop, midday or core loop and evening loop 3. In Arabidopsis, LATE ELONGATED HYPOCOTYL (LHY) and CIRCADIAN CLOCK ASSOCIATED 1 (CCA1), two MYB transcription factors, form the central circadian oscillator complex, together with PSEUDO RESPONSE REGULATOR 1 (PRR1), better known as TIMING OF CAB1 (TOC1). PSEUDO-RESPONSE REGULATOR 9 (PRR9) and 7 (PRR7) form the morning loop genes and the evening complex is formed by the three proteins EARLY FLOWERING 3 and 4 (ELF3 and ELF4) and LUX ARHYTHMO (LUX). These clock genes are interconnected via negative autoregulatory feedback loops, meaning that they reciprocally regulate each other 1,4-6. Light input is received by ZEITLUPE (ZTL), a gene containing an F-box domain and a blue-li...

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GIGANTEA‐like genes control seasonal growth cessation in Populus

Cited by 65 publications

References 68 publications

Update of Genetic Linkage Map and QTL Analysis for Growth Traits in Eucommia ulmoides Oliver

Update of Genetic Linkage Map and QTL Analysis for Growth Traits in Eucommia ulmoides Oliver

A comprehensive genomic scan reveals gene dosage balance impacts on quantitative traits inPopulustrees

The clock gene Gigantea 1 from Petunia hybrida coordinates vegetative growth and inflorescence architecture

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