Genetic variants of HvCbf14 are statistically associated with frost tolerance in a European germplasm collection of Hordeum vulgare

Fricano, Agostino; Rizza, Fulvia; Faccioli, Primetta; Pagani, D.; Pavan, Paolo; Stella, Alessandra; Rossini, Laura; Piffanelli, Pietro; Cattivelli, Luigi

doi:10.1007/s00122-009-1138-7

Cited by 52 publications

(47 citation statements)

References 75 publications

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“…In barley, it is still not clarified if a distinct CBF element could be causative of the FR-2 effect on the trait, as tentatively hypothesized by Fricano et al (2009), or if, more likely, the composition of the gene cluster in terms of copy number variation (CNV) of at least two elements could constitute the functional difference between freezing-tolerant and susceptible genotypes (Knox et al 2010). Yet, further studies would be necessary to validate the feasibility of a MAS approach based on single CBF elements rather than on the introgression of the whole CBF cluster region; especially in winter x winter genotype crosses, where recombinants between CBF sub-clusters could be not easy to obtain.…”

Section: Ld-mas For Freezing Tolerancementioning

confidence: 98%

Genomics of Low-Temperature Tolerance for an Increased Sustainability of Wheat and Barley Production

Pecchioni

Kosová

Vítámvás

et al. 2013

Genomics of Plant Genetic Resources

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Stability of high yields in a changing environment becomes the main aim of the future wheat and barley breeding, oriented towards development of frosttolerant winter and facultative cultivars together with careful selection of growth cycle adaptation and drought tolerance. Since low temperature signal influences both the cold acclimation and vernalization processes the interaction between VRN gene expression and freezing tolerance (FT) is discussed. Recent advances in global expression changes driven by cold are reviewed in view of the immense progress in high throughput technological platforms. Different signal transduction pathways in which several transcription factors play an important role regulating the expression of whole sets of genes are presented, including CBF-regulated and CBF-independent hubs. The knowledge acquired from genomics and transcriptome analysis has been then complemented by the description of metabolomics and proteomic approaches to help unraveling the molecular changes that occur under cold stress in the cereal plants. Finally, it is surveyed the great importance of stable and well-characterized genetic resources for future breeding for FT, that could switch from marker-assisted to genomics-assisted selection.

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Section: Ld-mas For Freezing Tolerancementioning

confidence: 98%

Genomics of Low-Temperature Tolerance for an Increased Sustainability of Wheat and Barley Production

Pecchioni

Kosová

Vítámvás

et al. 2013

Genomics of Plant Genetic Resources

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“…If this signal increase is reflective of a higher copy number state then these FR-H2 alleles may harbor increased copies of CBF14. CBF14 allelic variants showing association with higher levels of freezing tolerance have been identified (Fricano et al 2009). …”

Section: Fr-h2 Allelic Diversitymentioning

confidence: 98%

CBF2A–CBF4B genomic region copy numbers alongside the circadian clock play key regulatory mechanisms driving expression of FR-H2 CBFs

2017

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The C-Repeat Binding Factors (CBFs) are DNA-binding transcriptional activators that were identified using Arabidopsis thaliana. In barley, Hordeum vulgare, a cluster of CBF genes reside at FROST RESISTANCE-H2, one of two loci having major effects on winter-hardiness. FR-H2 was revealed in a population derived from the winter barley 'Nure' and the spring barley 'Trèmois'. 'Nure' harbors two to three copies of CBF2A and CBF4B as a consequence of tandem iteration of the genomic region encompassing these genes whereas 'Trèmois' harbors single copies, and these copy number differences are associated with their transcript level differences. Here we explore further the relationship between FR-H2 CBF gene copy number and transcript levels using 'Admire', a winter barley accumulating FR-H2 CBF gene transcripts to very high levels, and a group of lines related to 'Admire' through descent. DNA blot hybridization indicated the CBF2A-CBF4B genomic region is present in 7-8 copies in 'Admire' and is highly variable in copy number across the lines related to 'Admire'. At normal growth temperatures transcript levels of CBF12, CBF14, and CBF16 were higher in lines having greater CBF2A-CBF4B genomic region copy numbers than in lines having fewer copy numbers at peak expression level time points controlled by the circadian clock. Chromatin immunoprecipitation indicated CBF2 was at the CBF12 and CBF16 promoters at normal growth temperatures. These data support a scenario in which CBF2A-CBF4B genomic region copy numbers affect expression of other FR-H2 CBFs through a mechansim in which these other FR-H2 CBFs are activated by those in the copy number variable unit.

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“…Temperate grasses have a large number of CBF genes, which are differentially expressed in response to various environmental signals [82][83][84][85][86][87][88]. Exactly which of the CBF genes has the largest influence on freezing resistance appears to vary between species, genetic background, and/or environment [89][90][91][92]. One of the three CBFs in A. thaliana is upregulated by PSII excitation pressure, redox state of the plastoquinon pool, and ROS signaling [49].…”

Section: Regulation Of Leaf Growth Versus Cold Acclimationmentioning

confidence: 99%

Optimal Regulation of the Balance between Productivity and Overwintering of Perennial Grasses in a Warmer Climate

Ergon

2017

Agronomy

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Seasonal growth patterns of perennial plants are linked to patterns of acclimation and de-acclimation to seasonal stresses. The timing of cold acclimation (development of freezing resistance) and leaf growth cessation in autumn, and the timing of de-acclimation and leaf regrowth in spring, is regulated by seasonal cues in the environment, mainly temperature and light factors. Warming will lead to new combinations of these cues in autumn and spring. Extended thermal growing seasons offer a possibility for obtaining increased yields of perennial grasses at high latitudes. Increased productivity in the autumn may not be possible in all high latitude regions due to the need for light during cold acclimation and the need for accumulating a carbohydrate storage prior to winter. There is more potential for increased yields in spring due to the availability of light, but higher probability of freezing events in earlier springs would necessitate a delay of de-acclimation, or an ability to rapidly re-acclimate. In order to optimize the balance between productivity and overwintering in the future, the regulation of growth and acclimation processes may have to be modified. Here, the current knowledge on the coordinated regulation of growth and freezing resistance in perennial grasses is reviewed.

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Genetic variants of HvCbf14 are statistically associated with frost tolerance in a European germplasm collection of Hordeum vulgare

Cited by 52 publications

References 75 publications

Genomics of Low-Temperature Tolerance for an Increased Sustainability of Wheat and Barley Production

Genomics of Low-Temperature Tolerance for an Increased Sustainability of Wheat and Barley Production

CBF2A–CBF4B genomic region copy numbers alongside the circadian clock play key regulatory mechanisms driving expression of FR-H2 CBFs

Optimal Regulation of the Balance between Productivity and Overwintering of Perennial Grasses in a Warmer Climate

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