Inheritance of Dollar Spot Resistance in Creeping Bentgrass

Bonos, Stacy A.; Casler, Michael D.; Meyer, William A.

doi:10.2135/cropsci2003.2189

Cited by 41 publications

(61 citation statements)

References 25 publications

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“…2), which was very similar to previous research (Bonos et al 2003) and provided evidence that dollar spot resistance in creeping bentgrass was quantitatively inherited. In the resistant progeny clones, the number of necrotic spots was fewer, did not coalesce to form larger areas and the lesions were restricted to leaves.…”

Section: Discussionsupporting

confidence: 88%

“…This isolate was collected from a golf course in Minnesota (Chakraborty et al 2006). Inoculum was prepared by growing the isolate on sterilized Kentucky bluegrass seed following a modiWed protocol of Bonos et al (2003). In detail, 250 g of Kentucky bluegrass seeds were autoclaved for 25 min.…”

Section: Preparation Of S Homoeocarpa Inoculum and Inoculation Methodsmentioning

confidence: 99%

“…The Wrst rating dates at each location and year were chosen for the analysis, due to uniformity and very distinct nature of the disease symptoms. A random model for all eVects was used, and broad sense heritability was calculated over 2 years using the variance components calculated from expected mean squares from the ANOVA (Bonos et al 2003). In addition, phenotypic correlation of dollar spot severity was analyzed using 188 progeny over all the rating dates at two locations in 2004 and at three locations in 2005 (Table 3) using JMP software (SAS Institute, Cary, NC, USA).…”

Section: Preparation Of S Homoeocarpa Inoculum and Inoculation Methodsmentioning

confidence: 99%

“…Studies have indicated that dollar spot resistance may be quantitatively inherited (Bonos et al 2003). Moreover, high broad sense heritability estimates provided evidence that replication increased selection eYciency and that improvement in dollar spot resistance in creeping bentgrass should be possible.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, high broad sense heritability estimates provided evidence that replication increased selection eYciency and that improvement in dollar spot resistance in creeping bentgrass should be possible. According to Bonos et al (2003), a minimum of two to Wve eVective factors or genes, depending on the cross, may be associated with dollar spot resistance. A mixture of three isolates was used in their study and it was unknown if these results were due to major resistance genes speciWc to each isolate or due to a large number of genes indicating quantitative disease resistance.…”

Section: Introductionmentioning

confidence: 99%

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Mapping QTL for dollar spot resistance in creeping bentgrass (Agrostis stolonifera L.)

Chakraborty

Curley

Warnke³

et al. 2006

Theor Appl Genet

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Dollar spot caused by Sclerotinia homoeocarpa F. T. Bennett is the most economically important turf disease on golf courses in North America. Dollar spot resistance in a creeping bentgrass cultivar would greatly reduce the frequency, costs, and environmental impacts of fungicide application. Little work has been done to understand the genetics of resistance to dollar spot in creeping bentgrass. Therefore, QTL analysis was used to determine the location, number and eVects of genomic regions associated with dollar spot resistance in the Weld. To meet this objective, Weld inoculations using a single isolate were performed over 2 years and multiple locations using progeny of a full sib mapping population '549 £ 372'. Dollar spot resistance seems to be inherited quantitatively and broad sense heritability for resistance was estimated to be 0.88. We have detected one QTL with large eVect on linkage group 7.1 with LOD values ranging from 3.4 to 8.6 and explaining 14-36% of the phenotypic variance. Several smaller eVect QTL speciWc to rating dates, locations and years were also detected. The association of the tightly linked markers with the LG 7.1 QTL based on 106 progeny was further examined by single marker analysis on all 697 progeny. The high signiWcance of the QTL on LG 7.1 at a sample size of 697 (P < 0.0001), along with its consistency across locations, years and ratings dates, indicated that it was stable over environments. Markers tightly linked to the QTL can be utilized for marker-assisted selection in future bentgrass breeding programs.

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Section: Discussionsupporting

confidence: 88%

Section: Preparation Of S Homoeocarpa Inoculum and Inoculation Methodsmentioning

confidence: 99%

Section: Preparation Of S Homoeocarpa Inoculum and Inoculation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mapping QTL for dollar spot resistance in creeping bentgrass (Agrostis stolonifera L.)

Chakraborty

Curley

Warnke³

et al. 2006

Theor Appl Genet

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Novel action thresholds of a logistic regression model to forecast dollar spot on bentgrasses

et al. 2021

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Comparing methods to quantify cover in turfgrass research

et al. 2023

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Turfgrass cover can be assessed qualitatively using visual ratings, but quantitative turfgrass cover measurements are desired for producing unbiased data. Digital image analysis and point intercept are two quantitative percent cover data collection methods used in turfgrass research. A potential weakness of digital image analysis is the difficulty in evaluating color variation. Considering this, a series of controlled environment and field experiments were conducted to evaluate the accuracy of the point intercept method compared to using a digital grid, digital image analysis, and visual ratings when utilized in turfgrass research. To explore this topic, four experiments were conducted in Corvallis, OR, and one in New Brunswick, NJ. Results from research conducted in Corvallis, OR, determined that the closest point intercept spacing (2.5 cm) resulted in a percent cover that was not statistically different from the known cover and the lowest variance, but the greatest amount of time required to collect the data. Digital image analysis was the most consistent method for measuring percent cover when a known percent cover was being quantified. The estimate of the percent dollar spot cover was reduced by a single pigment application regardless of the data collection method. In the absence of pigment applications, the point intercept frame, digital image analysis, and visual ratings were well‐correlated methods used to assess dollar spot cover. Digital image analysis was not correlated with the other data collection methods when used to evaluate percent anthracnose cover. The research conducted in New Brunswick, NJ, determined that the point intercept method and digital image analysis are well‐correlated methods for quantifying turfgrass establishment from seed.

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Inheritance of Dollar Spot Resistance in Creeping Bentgrass

Cited by 41 publications

References 25 publications

Mapping QTL for dollar spot resistance in creeping bentgrass (Agrostis stolonifera L.)

Mapping QTL for dollar spot resistance in creeping bentgrass (Agrostis stolonifera L.)

Novel action thresholds of a logistic regression model to forecast dollar spot on bentgrasses

Comparing methods to quantify cover in turfgrass research

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