Freezing Tolerance‐Associated Quantitative Trait Loci in the Brundage × Coda Wheat Recombinant Inbred Line Population

Case, Austin J.; Skinner, Daniel Z.; Garland‐Campbell, Kimberly; Carter, Arron H.

doi:10.2135/cropsci2013.08.0526

Cited by 24 publications

(26 citation statements)

References 83 publications

(209 reference statements)

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“…The reversal in the relative amounts of variance due to general and specific combining ability at the two test temperatures (Table ) suggested that some genes were active at one, but not both, of the two test temperatures. This observation is consistent with a previous report of molecular markers significantly associated with freezing tolerance at some, but not all, test temperatures (Case, Skinner, Garland‐Campbell, & Carter, ).…”

Section: Discussionsupporting

confidence: 93%

Cytoplasmic and nuclear genetic components of membrane stability of winter wheat plants exposed to sub‐zero temperatures

Skinner

Cuevas

Bellinger

2018

J Agronomy Crop Science

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Winter wheat (Triticum aestivum L.) is seeded in the autumn and harvested the following summer, and therefore, must survive multiple episodes of subfreezing temperatures throughout the winter months. Cellular membrane stability following exposure to subfreezing temperatures contributes to the ability to survive these episodes. This study investigated the inheritance of the ability to tolerate subfreezing temperatures with a seven‐parent diallel cross analysis of cellular membrane integrity as measured by electrolyte leakage after exposure to −10 or −14 °C. Significant differences in membrane stability were found among the parent lines. The inheritance of the freezing tolerance as measured by electrolyte leakage was complex and characterized by significant additive, dominant and cytoplasmic effects. General combining ability, indicative of additive genetic effects, were significant at both test temperatures, but accounted for 25.5% of the variance at the −10° C test temperature, and only 4% of the variance at the −14 °C test temperature. Specific combining ability, indicative of genetic dominance effects, were significant at both test temperatures, but accounted for only 14.6% of the variance at the −10 °C test temperature, and 38% of the variance at the −14 °C test temperature. Reciprocal (cytoplasmic) effects were significant and accounted for about 20% of the variance at both test temperatures. Cytoplasmic effects contributing to greater membrane stability were especially apparent in the cultivar Tiber when crossed to Masami, Lewjain, or Hatton. These results suggest that efforts to improve freezing tolerance are complicated by differing gene action at different test temperatures and also may benefit from identifying specific combinations of nuclear and cytoplasm sources that are most conducive to membrane stability following freezing.

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Section: Discussionsupporting

confidence: 93%

Cytoplasmic and nuclear genetic components of membrane stability of winter wheat plants exposed to sub‐zero temperatures

Skinner

Cuevas

Bellinger

2018

J Agronomy Crop Science

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“…Lines from the AMP observed to have high tolerance to snow mold also possessed cold tolerance alleles on three C-repeat binding factor (CBF) loci (S Carle, unpublished data), suggesting that selecting lines that can survive cold temperatures could also result in selection for lines with snow mold tolerance. Major low-temperature tolerance QTL were previously identified in chromosome 5A (Båga et al, 2007; Case et al, 2014) and 5B (Zhao et al, 2013) near known freezing tolerance and vernalization genes, showing the relevance of these loci in winter survival, as well as tolerance to fungal diseases related with low temperature conditions.…”

Section: Discussionmentioning

confidence: 99%

Genetic Dissection of Snow Mold Tolerance in US Pacific Northwest Winter Wheat Through Genome-Wide Association Study and Genomic Selection

et al. 2019

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Snow mold is a yield-limiting disease of wheat in the Pacific Northwest (PNW) region of the US, where there is prolonged snow cover. The objectives of this study were to identify genomic regions associated with snow mold tolerance in a diverse panel of PNW winter wheat lines in a genome-wide association study (GWAS) and to evaluate the usefulness of genomic selection (GS) for snow mold tolerance. An association mapping panel (AMP; N = 458 lines) was planted in Mansfield and Waterville, WA in 2017 and 2018 and genotyped using the Illumina® 90K single nucleotide polymorphism (SNP) array. GWAS identified 100 significant markers across 17 chromosomes, where SNPs on chromosomes 5A and 5B coincided with major freezing tolerance and vernalization loci. Increased number of favorable alleles was related to improved snow mold tolerance. Independent predictions using the AMP as a training population (TP) to predict snow mold tolerance of breeding lines evaluated between 2015 and 2018 resulted in a mean accuracy of 0.36 across models and marker sets. Modeling nonadditive effects improved accuracy even in the absence of a close genetic relatedness between the TP and selection candidates. Selecting lines based on genomic estimated breeding values and tolerance scores resulted in a 24% increase in tolerance. The identified genomic regions associated with snow mold tolerance demonstrated the genetic complexity of this trait and the difficulty in selecting tolerant lines using markers. GS was validated and showed potential for use in PNW winter wheat for selecting on complex traits such tolerance to snow mold.

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“…In fact, QTL have been found on various chromosomes throughout the genome, as is the case in this study. For instance, three studies of freezing tolerance identified QTL on chromosomes 1A, 1D, 2A, 2B, 3A, 5A, 5B, 6A, 6D, and 7B ( Fowler et al 2016 ; Båga et al 2006 ; Case et al 2014 ). Each of these studies examined different freezing stress conditions, but they demonstrate the quantitative nature of freezing tolerance.…”

Section: Discussionmentioning

confidence: 99%

Genomic Regions Associated with Tolerance to Freezing Stress and Snow Mold in Winter Wheat

Kruse

Carle

Wen

et al. 2017

G3 Genes|Genomes|Genetics

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Plants grown through the winter are subject to selective pressures that vary with each year’s unique conditions, necessitating tolerance of numerous abiotic and biotic stress factors. The objective of this study was to identify molecular markers in winter wheat (Triticum aestivum L.) associated with tolerance of two of these stresses, freezing temperatures and snow mold—a fungal disease complex active under snow cover. A population of 155 F2:5 recombinant inbred lines from a cross between soft white wheat cultivars “Finch” and “Eltan” was evaluated for snow mold tolerance in the field, and for freezing tolerance under controlled conditions. A total of 663 molecular markers was used to construct a genetic linkage map and identify marker-trait associations. One quantitative trait locus (QTL) associated with both freezing and snow mold tolerance was identified on chromosome 5A. A second, distinct, QTL associated with freezing tolerance also was found on 5A, and a third on 4B. A second QTL associated with snow mold tolerance was identified on chromosome 6B. The QTL on 5A associated with both traits was closely linked with the Fr-A2 (Frost-Resistance A2) locus; its significant association with both traits may have resulted from pleiotropic effects, or from greater low temperature tolerance enabling the plants to better defend against snow mold pathogens. The QTL on 4B associated with freezing tolerance, and the QTL on 6B associated with snow mold tolerance have not been reported previously, and may be useful in the identification of sources of tolerance for these traits.

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Freezing Tolerance‐Associated Quantitative Trait Loci in the Brundage × Coda Wheat Recombinant Inbred Line Population

Cited by 24 publications

References 83 publications

Cytoplasmic and nuclear genetic components of membrane stability of winter wheat plants exposed to sub‐zero temperatures

Cytoplasmic and nuclear genetic components of membrane stability of winter wheat plants exposed to sub‐zero temperatures

Genetic Dissection of Snow Mold Tolerance in US Pacific Northwest Winter Wheat Through Genome-Wide Association Study and Genomic Selection

Genomic Regions Associated with Tolerance to Freezing Stress and Snow Mold in Winter Wheat

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