Perspectives on Low Temperature Tolerance and Vernalization Sensitivity in Barley: Prospects for Facultative Growth Habit

Muñoz‐Amatriaín, María; Hernandez, Javier; Herb, Dustin; Baenziger, P. Stephen; Bochard, Anne Marie; Capettini, Flávio; Casas, Ana M.; Cuesta‐Marcos, Alfonso; Einfeldt, Claus; Fisk, Scott; Genty, Amélie; Helgerson, Laura; Herz, Markus; Hu, Gongshe; Igartua, Ernesto; Karsaï, I.; Nakamura, Toshiki; Sato, Kazuhiro; Smith, Kevin P.; Stockinger, Eric J.; Thomas, William; Hayes, Patrick

doi:10.3389/fpls.2020.585927

Cited by 25 publications

(29 citation statements)

References 65 publications

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“…An interesting hypothesis argues that vernalization, despite its well-proven adaptive role, could carry an agronomic burden when sowing dates are uncertain. Under these circumstances, frost-tolerant facultative cultivars could be advantageous (Muñoz-Amatriaín et al 2020 ).…”

Section: Vernalization Responsementioning

confidence: 99%

“…These cultivars show winter hardiness but lack an obligate vernalization requirement (Dubcovsky et al 2005 ; Karsai et al 2005 ; von Zitzewitz et al 2005 ). Recent results suggest that facultative barleys, with very high frost tolerance, may contain full or partial deletions of some of the HvZCCT genes (Muñoz-Amatriaín et al 2020 ).…”

Section: Vernalization Responsementioning

confidence: 99%

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Major flowering time genes of barley: allelic diversity, effects, and comparison with wheat

2021

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Key message This review summarizes the allelic series, effects, interactions between genes and with the environment, for the major flowering time genes that drive phenological adaptation of barley. Abstract The optimization of phenology is a major goal of plant breeding addressing the production of high-yielding varieties adapted to changing climatic conditions. Flowering time in cereals is regulated by genetic networks that respond predominately to day length and temperature. Allelic diversity at these genes is at the basis of barley wide adaptation. Detailed knowledge of their effects, and genetic and environmental interactions will facilitate plant breeders manipulating flowering time in cereal germplasm enhancement, by exploiting appropriate gene combinations. This review describes a catalogue of alleles found in QTL studies by barley geneticists, corresponding to the genetic diversity at major flowering time genes, the main drivers of barley phenological adaptation: VRN-H1 (HvBM5A), VRN-H2 (HvZCCTa-c), VRN-H3 (HvFT1), PPD-H1 (HvPRR37), PPD-H2 (HvFT3), and eam6/eps2 (HvCEN). For each gene, allelic series, size and direction of QTL effects, interactions between genes and with the environment are presented. Pleiotropic effects on agronomically important traits such as grain yield are also discussed. The review includes brief comments on additional genes with large effects on phenology that became relevant in modern barley breeding. The parallelisms between flowering time allelic variation between the two most cultivated Triticeae species (barley and wheat) are also outlined. This work is mostly based on previously published data, although we added some new data and hypothesis supported by a number of studies. This review shows the wide variety of allelic effects that provide enormous plasticity in barley flowering behavior, which opens new avenues to breeders for fine-tuning phenology of the barley crop.

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Section: Vernalization Responsementioning

confidence: 99%

Section: Vernalization Responsementioning

confidence: 99%

Major flowering time genes of barley: allelic diversity, effects, and comparison with wheat

2021

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“…Harlan [ 45 ] suggested they came from Switzerland or the Balkans, while Poehlman and Wiebe [ 61 , 62 ] considered the Caucasus region in addition to those suggested by Harlan. Recent genotyping data indicates they are closely related to winter accessions from Germany, Italy, and the Czech Republic [ 63 ].…”

Section: Contextual Information For Understanding Malting Barley and Winter-hardinessmentioning

confidence: 99%

“…More recently, in a study carried out by Hayes and colleagues, winter survival of nearly 1000 accessions was assessed when grown over two seasons on three continents: at 13 locations in 2013–2014, and at 11 locations in 2014–2015 [ 63 ]. This study involved 21 barley breeding and genetics programs from around the world, each of which contributed germplasm, including cultivars, landraces, and advanced generation breeding lines from their respective programs.…”

Section: Contextual Information For Understanding Malting Barley and Winter-hardinessmentioning

confidence: 99%

The Breeding of Winter-Hardy Malting Barley

Stockinger

2021

Plants

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In breeding winter malting barley, one recurring strategy is to cross a current preferred spring malting barley to a winter barley. This is because spring malting barleys have the greatest amalgamation of trait qualities desirable for malting and brewing. Spring barley breeding programs can also cycle their material through numerous generations each year—some managing even six—which greatly accelerates combining desirable alleles to generate new lines. In a winter barley breeding program, a single generation per year is the limit when the field environment is used and about two generations per year if vernalization and greenhouse facilities are used. However, crossing the current favored spring malting barley to a winter barley may have its downsides, as winter-hardiness too may be an amalgamation of desirable alleles assembled together that confers the capacity for prolonged cold temperature conditions. In this review I touch on some general criteria that give a variety the distinction of being a malting barley and some of the general trends made in the breeding of spring malting barleys. But the main objective of this review is to pull together different aspects of what we know about winter-hardiness from the seemingly most essential aspect, which is survival in the field, to molecular genetics and gene regulation, and then finish with ideas that might help further our insight for predictability purposes.

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“…Several genome-wide association studies (GWAS) have been conducted to map LTT genes in barley using diverse germplasm panels ( von Zitzewitz et al, 2011 ; Visioni et al, 2013 ; Muñoz-Amatriaín et al, 2020 ). Although several genes and quantitative trait loci (QTL) for LTT were identified in these investigations, it is not known whether they would confer sufficient winter hardiness for barley to survive the typically severe winters in the Upper Midwest region.…”

Section: Introductionmentioning

confidence: 99%

Cold Conditioned: Discovery of Novel Alleles for Low-Temperature Tolerance in the Vavilov Barley Collection

Sallam

Smith

Hu³

et al. 2021

Front. Plant Sci.

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Climate changes leading to higher summer temperatures can adversely affect cool season crops like spring barley. In the Upper Midwest region of the United States, one option for escaping this stress factor is to plant winter or facultative type cultivars in the autumn and then harvest in early summer before the onset of high-temperature stress. However, the major challenge in breeding such cultivars is incorporating sufficient winter hardiness to survive the extremely low temperatures that commonly occur in this production region. To broaden the genetic base for winter hardiness in the University of Minnesota breeding program, 2,214 accessions from the N. I. Vavilov Institute of Plant Industry (VIR) were evaluated for winter survival (WS) in St. Paul, Minnesota. From this field trial, 267 (>12%) accessions survived [designated as the VIR-low-temperature tolerant (LTT) panel] and were subsequently evaluated for WS across six northern and central Great Plains states. The VIR-LTT panel was genotyped with the Illumina 9K SNP chip, and then a genome-wide association study was performed on seven WS datasets. Twelve significant associations for WS were identified, including the previously reported frost resistance gene FR-H2 as well as several novel ones. Multi-allelic haplotype analysis revealed the most favorable alleles for WS in the VIR-LTT panel as well as another recently studied panel (CAP-LTT). Seventy-eight accessions from the VIR-LTT panel exhibited a high and consistent level of WS and select ones are being used in winter barley breeding programs in the United States and in a multiparent population.

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Perspectives on Low Temperature Tolerance and Vernalization Sensitivity in Barley: Prospects for Facultative Growth Habit

Cited by 25 publications

References 65 publications

Major flowering time genes of barley: allelic diversity, effects, and comparison with wheat

Major flowering time genes of barley: allelic diversity, effects, and comparison with wheat

The Breeding of Winter-Hardy Malting Barley

Cold Conditioned: Discovery of Novel Alleles for Low-Temperature Tolerance in the Vavilov Barley Collection

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