Heritability Estimates and Response to Selection for Fusarium Head Blight Resistance in Soft Red Winter Wheat

Verges, Virginia L.; Sanford, David A. Van; Brown‐Guedira, Gina

doi:10.2135/cropsci2005.11-0412

Cited by 19 publications

(21 citation statements)

References 27 publications

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“…The heritability estimates for incidence, severity, and DON concentration were lower than reported by many studies (Jiang et al, 2007; Liu et al, 2007; Ma et al, 2006; Yang et al, 2005), although other studies have reported comparably low heritability estimates for FHB resistance components (Verges et al, 2006; Yu et al, 2008). The low heritability estimates for DON concentration indicate that a large portion of the variance was due to nongenetic effects, providing further support that DON accumulation is affected by environment.…”

Section: Discussioncontrasting

confidence: 68%

Resistance to Fusarium Head Blight and Kernel Damage in a Winter Wheat Recombinant Inbred Line Population

Bonin

Kolb

2009

Crop Science

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Fusarium head blight (FHB), primarily caused by Fusarium graminearum Schwabe [teleomorph: Gibberella zeae (Schwein.) Petch], is a devastating disease of wheat (Triticum aestivum L.), causing low yields and poor quality kernels that may be contaminated by the mycotoxin deoxynivalenol (DON). The objective of this study was to examine kernel damage resistance and to map quantitative trait loci (QTL) associated with FHB resistance in wheat. A population of 269 recombinant inbred lines (RILs) derived from a cross between IL94‐1653 × Patton was evaluated for FHB resistance in greenhouse and field trials at Urbana, IL. The RIL population exhibited a broad and continuous distribution for all FHB resistance measurements. The correlation of disease severity with kernel damage was 0.78 in the greenhouse trial and 0.58 in the field trial. Grain DON concentration appeared to be environmentally affected, and correlated the most consistently with the ISK index, an index combining incidence, severity, and kernel damage measurements. Four severity QTL were identified on chromosomes 2B, 3B, 4B, and 6B, each explaining about 4 to 6% of the phenotypic variation. The same severity QTL were not detected in both the field and greenhouse trials. Three kernel damage QTL were identified on chromosomes 2B, 4B, and 6B, with the 4B QTL explaining 7 and 12.3% of the phenotypic variation for kernel damage in the greenhouse and field trials, respectively. This is the second report of a kernel damage QTL in this region of chromosome 4B, indicating that this QTL may contribute to reducing Fusarium‐damaged kernels percentage.

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Section: Discussioncontrasting

confidence: 68%

Resistance to Fusarium Head Blight and Kernel Damage in a Winter Wheat Recombinant Inbred Line Population

Bonin

Kolb

2009

Crop Science

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“…The corresponding coefficients of variation were 11.2 and 15.5. Other studies have reported heritabilities from 0.16 to 0.82 (Agostinelli et al, 2012;Balut et al, 2013;Verges et al, 2006). The corresponding heritabilities on an entry mean basis were 0.67 and 0.75.…”

Section: Nc-neuse × Ags 2000 Populationmentioning

confidence: 88%

Digital Image Analysis Method for Estimation of Fusarium‐Damaged Kernels in Wheat

et al. 2014

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Fusarium head blight (FHB) of wheat (Triticum aestivum L.), or head scab, causes a reduction in grain yield and quality through the formation of shriveled, dull‐grey seeds called “tombstones” or Fusarium‐damaged kernels (FDK). Fusarium‐damaged kernels are commonly quantified on a percentage basis by visually separating damaged from healthy kernels following harvest, in a process that is both time consuming and labor intensive. The objective of this study was to evaluate an alternative method for quantifying FDK through the use of the digital image analysis program ImageJ. The ‘NC‐Neuse’ × ‘AGS 2000’ F5–derived recombinant inbred population of 172 lines and the NC‐Neuse ×‘Bess’ double haploid population of 112 lines were used in this study. NC‐Neuse and Bess were moderately resistant and AGS 2000 was susceptible to FHB. The populations were evaluated under moderate to heavy FHB epidemics in a total of five environments in North Carolina, Maryland, and Missouri with two to three replications per environment during the 2010 to 2011 and 2011 to 2012 seasons. Following hand harvest and grain processing, FDK was estimated by (i) visual separation of diseased kernels and (ii) digital image analysis using ImageJ on captured images of grain samples. The correlation between the two methods ranged from 0.72 to 0.80 over five environments. A lower correlation was observed in one environment due to cracked and broken kernels in the samples. Digital image analysis was three times faster than the visual method and estimated FDK on a larger scale per plot sample, whereas labor and time constraints limited the sample size for the visual method. Digital image analysis was consistent over samples and appears well suited as an alternative form to estimate percent of FDK in grain that is not damaged in other ways.

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“…Verges et al (2006) suggested that selection in SRWW would produce small gains for FHB resistance unless complemented with major QTL from Asian sources. Crosses involving moderate resistant and even moderately susceptible lines generally provided useful transgressive segregation and good levels of FHB resistance.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, heritability appeared high in most years of this study. Verges et al (2006) suggested that selection in SRWW would produce small gains for FHB resistance unless complemented with major QTL from Asian sources. We report higher heritability (realized and F 4 family entrymean) than they found with their F 2 derived families.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Resistance to Fusarium Head Blight in an Eastern U.S. Soft Red Winter Wheat Population

2010

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Host resistance is important to control Fusarium head blight (FHB) ), caused by the fungus Fusarium graminearum (Schwabe) [teleomorph: Gibberella zeae (schw.) Petch], in wheat (Triticum aestivum L.). Effective breeding requires understanding the genetics of resistance in breeding populations. Our objective was to deduce the genetics of FHB resistance in eastern U.S. soft red winter wheat (SRWW) by estimating heritability, means, and phenotype frequencies. We evaluated the FHB index of 2983 lines from 223 parents in a series of single‐ and multiyear trials conducted in inoculated FHB nurseries. The mean index of all lines (23.8%) was similar to that of the moderate resistant check (19.7%), and the distribution was often skewed toward low index values. Without selection, 41% of all lines had moderate resistance and 70% of all crosses produced such lines. Entry‐mean heritability for index generally exceeded 0.65 and selection for lower index reduced the index by −37%. The moderate resistance arose from many SRWW parents with varying levels of FHB resistance. The genetics of resistance in this population is probably characterized by a relatively high frequency of resistance alleles at multiple loci, dispersed over many parents that differ in allele content at loci controlling FHB resistance. This population should provide excellent gain from recurrent selection and complement current marker‐assisted selection efforts.

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Heritability Estimates and Response to Selection for Fusarium Head Blight Resistance in Soft Red Winter Wheat

Cited by 19 publications

References 27 publications

Resistance to Fusarium Head Blight and Kernel Damage in a Winter Wheat Recombinant Inbred Line Population

Resistance to Fusarium Head Blight and Kernel Damage in a Winter Wheat Recombinant Inbred Line Population

Digital Image Analysis Method for Estimation of Fusarium‐Damaged Kernels in Wheat

Characterization of Resistance to Fusarium Head Blight in an Eastern U.S. Soft Red Winter Wheat Population

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