Evaluation of several wild tuber-bearingSolanum species for scab resistance

Hosaka, Kazuyoshi; Matsunaga, Hiroshi; Senda, Katsunori

doi:10.1007/bf02853660

Cited by 14 publications

(3 citation statements)

References 6 publications

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“…Potato scab has been described from most locations around the world. Because of its wide distribution, S. scabiei has been recognized as the main causal agent of potato scab (Hosaka et al. , 2000).…”

Section: Discussionmentioning

confidence: 99%

Distribution and characterization of Streptomyces species causing potato common scab in Germany

et al. 2012

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Field-grown potatoes showing scab infections were sampled in two successive years and analysed for prevailing Streptomyces strains. In 2008 and 2009, 293 Streptomyces isolates were collected in Germany and analysed for morphology, pathogenicity and strain type. Isolates varied in mycelium colour, sporulation and pigmentation. Based on their morphology, no clear differentiation of species was possible. At the genetic level, sampled isolates, as well as a number of type strains from culture collections, were characterized by PCR using 16S rRNA-specific primers and PCR-RFLP of the 16S-23S internal transcribed spacer (ITS) region with Hpy99I. Using this fingerprinting approach, Streptomyces species could be differentiated genotypically. The data from this study show that diversity among scab-causing species in Germany is much higher than previously thought. Isolates belonged to various Streptomyces spp. previously associated with common scab. This is apparently the first report of pathogenic strains of S. europaeiscabiei, S. stelliscabiei, S. acidiscabiei, S. turgidiscabiei and S. bottropensis within Germany. Streptomyces europaeiscabiei was the predominant species found. Other scab-causing species were identified, but their local distribution was uneven. For most of the isolates, the presence of the txtAB gene was demonstrated, indicating pathogenicity. This analysis is one of the first reports to examine the distribution of common scab-causing species in Germany.

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Section: Discussionmentioning

confidence: 99%

Distribution and characterization of Streptomyces species causing potato common scab in Germany

et al. 2012

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“…High levels of resistance to common scab and CIS are not found in most commercially significant cultivars of potato. However, the wild tuber‐bearing diploid potato relative S. chacoense has been identified as a source of resistance to these traits (Dionne and Lawrence, 1961; Douches and Freyre, 1994; Hosaka et al, 2000; Hamernik et al, 2009; McCann et al, 2010). Diploid derivatives of S. tuberosum are sexually compatible with S. chacoense (Hermundstad and Peloquin, 1986).…”

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confidence: 99%

Quantitative Trait Loci for Resistance to Common Scab and Cold‐Induced Sweetening in Diploid Potato

et al. 2017

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The development of germplasm with resistance to common scab and cold-induced sweetening is a high priority for the potato (Solanum tuberosum L.) industry. A mapping population was developed from mating two individuals of a diploid family generated by crossing the susceptible cultivated potato clone US-W4 to the highly resistant wild relative (Solanum chacoense Bitter) clone '524-8'. Progeny were evaluated in replicated field trials. Tubers were scored for percentage of surface area with scab lesions, scab lesion type, cold-induced sweetening, average tuber weight, and dry matter. Plants were evaluated for vine maturity. A genetic map was constructed, quantitative trait loci (QTLs) were identified, and the gene action of significant QTLs was characterized using 1606 single nucleotide polymorphisms (SNPs). Significant QTLs for common scab percentage of surface area covered with lesions and lesion type were identified in overlapping regions on chromosome 11 (R 2 = 21.0 and 18.2%, respectively). Quantitative trait loci were identified on chromosomes 4 (R 2 = 17.1%) and 6 (R 2 = 19.4%) for cold-induced sweetening, chromosome 5 for maturity (R 2 = 29.8%), and chromosome 1 (R 2 = 26.3 and 22.0%) for average tuber weight. Identification of QTLs is the first step toward developing molecular markers for breeders to efficiently integrate these desirable traits into cultivars.

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“…Many authors (Hawkes 1990, Goth et al 1995, Hosaka et al 2000 were engaged in breeding and selection of the sources of resistance to common scab, including the identification of sources in wild species. Krantz and Eide (1941) elaborated genetics of the resistance to common scab, distinguishing 5 genetic groups that differ in their response to common scab -quadruplex, triplex, duplex, simplex and nulliplex; for breeding minimally duplex is necessary.…”

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confidence: 99%

The greenhouse provocation test for determination of resistance to potato common scab [Streptomyces scabiei (ex Thaxter 1982) Lambert and Loria 1989]

Domkářová¹,

Vokál²,

Horáčková³

et al. 2007

PLANT SOIL ENVIRON

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Between 2002 and 2004 the evaluation method of resistance to common scab was tested on potato genetic resources. The resistance of potato tubers to common scab was evaluated in the greenhouse provocation tests with planting in naturally infested soil. The test was evaluated on the tubers of 26 varieties and hybrids of Solanum tuberosum derived from a potato genetic resource collection. Ten tubers of each sample were individually planted into three-liter pots containing infested soil. Analysis of variance confirmed significant differences among individual varieties and hybrids as well as among the years. A rating scale for the evaluation of resistance to common scab was designed. The genotypes ranked into scores 7 (high resistance) to 9 (very high resistance); on the new scale they could be considered perspective genetic resources in breeding for improvement of the level of this character. The evaluated set consisted of genotypes:

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Evaluation of several wild tuber-bearingSolanum species for scab resistance

Cited by 14 publications

References 6 publications

Distribution and characterization of Streptomyces species causing potato common scab in Germany

Distribution and characterization of Streptomyces species causing potato common scab in Germany

Quantitative Trait Loci for Resistance to Common Scab and Cold‐Induced Sweetening in Diploid Potato

The greenhouse provocation test for determination of resistance to potato common scab [Streptomyces scabiei (ex Thaxter 1982) Lambert and Loria 1989]

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