Foliar reaction toPhytophthora infestans in inoculated potato field trials in Michigan

Douches, David S.; Coombs, Joseph; Felcher, Kimberly J.; Kirk, W. W.

doi:10.1007/bf02870205

Cited by 6 publications

(8 citation statements)

References 12 publications

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“…The present study reports for the first time the major source of late blight resistance in “Jacqueline Lee.” This cultivar is a unique source of resistance to P. infestans . It has exhibited consistently high levels of resistance not only to US-8 ( Douches et al 2001 ; Douches et al 2004 ; Young et al 2009 ) but also to US-22 and US-23, which have affected Michigan and the Northeastern United States ( Rojas et al 2014 ). With the availability of a genome-wide set of genetic markers and the recently developed statistical tools for genetic linkage analysis and QTL mapping that incorporate allele dosage information, we were able to identify a major-effect QTL and a candidate SNP marker associated with a decrease in late blight infection.…”

Section: Resultsmentioning

confidence: 99%

Genetic Linkage Mapping of Economically Important Traits in Cultivated Tetraploid Potato (Solanum tuberosum L.)

Massa

Manrique-Carpintero

Coombs

et al. 2015

G3 Genes|Genomes|Genetics

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The objective of this study was to construct a single nucleotide polymorphism (SNP)-based genetic map at the cultivated tetraploid level to locate quantitative trait loci (QTL) contributing to economically important traits in potato (Solanum tuberosum L.). The 156 F1 progeny and parents of a cross (MSL603) between “Jacqueline Lee” and “MSG227-2” were genotyped using the Infinium 8303 Potato Array. Furthermore, the progeny and parents were evaluated for foliar late blight reaction to isolates of the US-8 genotype of Phytophthora infestans (Mont.) de Bary and vine maturity. Linkage analyses and QTL mapping were performed using a novel approach that incorporates allele dosage information. The resulting genetic maps contained 1972 SNP markers with an average density of 1.36 marker per cM. QTL mapping identified the major source of late blight resistance in “Jacqueline Lee.” The best SNP marker mapped ∼0.54 Mb from a resistance hotspot on the long arm of chromosome 9. For vine maturity, the major-effect QTL was located on chromosome 5 with allelic effects from both parents. A candidate SNP marker for this trait mapped ∼0.25 Mb from the StCDF1 gene, which is a candidate gene for the maturity trait. The identification of markers for P. infestans resistance will enable the introgression of multiple sources of resistance through marker-assisted selection. Moreover, the discovery of a QTL for late blight resistance not linked to the QTL for vine maturity provides the opportunity to use marker-assisted selection for resistance independent of the selection for vine maturity classifications.

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Section: Resultsmentioning

confidence: 99%

Genetic Linkage Mapping of Economically Important Traits in Cultivated Tetraploid Potato (Solanum tuberosum L.)

Massa

Manrique-Carpintero

Coombs

et al. 2015

G3 Genes|Genomes|Genetics

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“…The WTS lines (Table 1) had previously been selected for their late blight resistance using detached‐leaf assays. The late blight resistance of six WTS lines was also evaluated in an inoculated field test in Michigan (Douches et al, 2004). The field test showed that these six WTS lines are highly resistant to late blight.…”

Section: Resultsmentioning

confidence: 99%

Marker‐Assisted Selection for the Broad‐Spectrum Potato Late Blight Resistance Conferred by Gene RB Derived from a Wild Potato Species

et al. 2006

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Potato (Solanum tuberosum L.) late blight, caused by Phytophthora infestans (Mont.) de Bary, is one of the most damaging diseases in any crop. Deployment of resistant varieties is the most effective way to control this disease. However, breeding for late blight resistance has been a challenge because the race‐specific resistance genes introgressed from wild potato S. demissum Lindl. have been short lived and breeding for “horizontal” or durable resistance has achieved only moderate successes. We previously demonstrated that the high‐level late blight resistance in a wild potato relative, S. bulbocastanum Dunal subsp. bulbocastanum, is mainly controlled by a single resistance gene RB Transgenic potato lines containing the RB gene have showed strong late blight resistance, comparable to the backcrossed progenies derived from the somatic hybrids between potato and S. bulbocastanum Here we report the development of a polymerase chain reaction‐based DNA marker for tracking the RB gene in breeding populations derived from the potato × S. bulbocastanum somatic hybrids. Several marker‐positive breeding lines showed the expected late blight resistance in greenhouse evaluations. Our results demonstrate that marker‐based selection will allow us to effectively transfer the RB gene into potato using traditional breeding methods, an alternative to deploying the RB gene through genetic transformation.

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“…Potato breeding efforts at Michigan State University and other potato breeding programmes in the USA have resulted in potato cultivars that are largely resistant to foliar late blight (Douches et al 2004;Kirk et al 2001a, c) but not significantly less susceptible than other cultivars in terms of tuber blight resistance (Kirk et al 2001b). Potato late blight resistance estimates for the cultivars/ABLs used in this study were breeders' estimates and are given below as foliar and tuber ratings, respectively.…”

Section: Potato Germplasmmentioning

confidence: 99%

Impact of Different US Genotypes of Phytophthora infestans on Potato Seed Tuber Rot and Plant Emergence in a Range of Cultivars and Advanced Breeding Lines

et al. 2009

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Seed pieces of different potato cultivars and advanced breeding lines (ABLs) from north central US breeding programmes were inoculated with different genotypes of Phytophthora infestans (US-1, US-1.7, US-8, . The effect of these genotypes of P. infestans on seed piece rot severity after re-storage was assessed using an image analysis technique. P. infestans genotypes demonstrated variable ability to cause seed piece rot and to reduce plant emergence measured as final plant stand (%) and the relative area under the plant emergence curve (RAUEPC). The US-8 genotype of P. infestans was the most aggressive genotype, as indicated by tuber rot severity across all cultivars/ABLs tested, followed by US-14 in both years. The US-1, US-1.7 and US-11 genotypes were the least aggressive, causing only moderate seed piece rotting across cultivars/ABLs tested. Similar trends were observed in two field experiments, where the US-8 and US-14 genotypes delayed or reduced emergence. Values of final plant stand (%) and RAUEPC demonstrated that the cultivars/ABLs Atlantic, MSJ453-4Y and Torridon were the least susceptible across all P. infestans genotypes. In both experiments cv. Pike was the most susceptible. Other cultivars/ABLs demonstrated variable

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Foliar reaction toPhytophthora infestans in inoculated potato field trials in Michigan

Cited by 6 publications

References 12 publications

Genetic Linkage Mapping of Economically Important Traits in Cultivated Tetraploid Potato (Solanum tuberosum L.)

Genetic Linkage Mapping of Economically Important Traits in Cultivated Tetraploid Potato (Solanum tuberosum L.)

Marker‐Assisted Selection for the Broad‐Spectrum Potato Late Blight Resistance Conferred by Gene RB Derived from a Wild Potato Species

Impact of Different US Genotypes of Phytophthora infestans on Potato Seed Tuber Rot and Plant Emergence in a Range of Cultivars and Advanced Breeding Lines

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