Cucurbit powdery mildews: methodology for objective determination and denomination of races

Lebeda, A.; Křístková, E.; Sedláková, B.; McCreight, James D.; Coffey, Michael D.

doi:10.1007/s10658-015-0776-7

Cited by 46 publications

(61 citation statements)

References 32 publications

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“…CPM race identification tests have been performed with whole plants in greenhouses, growth chambers and fields, and with leaf discs (Lebeda et al 2016 The criteria to identify or discern CPM races has changed considerably since the 1930s, when race 2 was identified on PMR 45 (Jagger et al 1938). Only two differentials were known for 40 years: PMR 45 (resistant to race 1) and PMR 5 (resistant to races 1 and 2).…”

Section: Resultsmentioning

confidence: 99%

“…A set of 21 melon CPM differentials has been proposed for characterization of virulence variation in P. xanthii and G. orontii (Lebeda et al 2016). This large set is ideal for detection of a new variation in a pathogen population, but is not necessary for detection of a new and unexpected virulence variation in a melon production area.…”

Section: Resultsmentioning

confidence: 99%

“…P. xanthii occurs in a higher frequency in tropical and subtropical regions, whereas G. orontii is most observed in temperate climate (Cohen et al 2004, Naruzawa et al 2011. Physiological races and pathotypes are well documented for both species (Lebeda et al 2016). There are nearly 50 identified physiological races and approximately 36 sources of host plant resistance in melon (McCreight 2006, McCreight et al 2012.…”

Section: Identificação De Raças De Oídio Das Cucurbitáceas E Reação Dmentioning

confidence: 99%

“…The local population can be initially characterized and subsequently monitored by assaying relevant CPM samples on sets of melon race differentials (Thomas et al 1984, McCreight et al 2012, Lebeda et al 2016. As the CPM population shifts for virulence factors, breeders and pathologists must seek new sources of resistance for development of new CPM-resistant cultivars.…”

Section: Identificação De Raças De Oídio Das Cucurbitáceas E Reação Dmentioning

confidence: 99%

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Cucurbits powdery mildew race identity and reaction of melon genotypes1

Rabelo

Santos

Diniz

et al. 2017

Pesqui. Agropecu. Trop.

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Genetic resistance is one of the most suitable strategies to control cucurbit powdery mildew (CPM) on melon, incited by Podosphaera xanthii or Golovinomyces orontii. However, many races of these pathogens have been reported worldwide in recent years, what may compromise the effectiveness of this method. Thus, annual surveys of CPM races and the screening of germplasm for new sources of genetic resistance provide a vital support to melon breeding programs. This study aimed at identifying a natural population of CPM race under greenhouse conditions, as well as evaluating the reaction of local and exotic melon germplasm for CPM-resistance. CPM race identity was based on the reaction of eight race differentials: Védrantais, Nantais Oblong, PMR 45, PMR 5, WMR 29, Edisto 47, PI 414723 and PI 124111. Fifty-nine melon genotypes were evaluated, 53 of them being germplasm accessions, and six net melon elite-inbred lines, besides two net melon-type cultivars (Louis and Fantasy). Plants were evaluated using a visual scale for leaf lesions. The causal pathogen was confirmed to be P. xanthii, based on the presence of fibrosin bodies in conidia and the complete resistance response of winter melon (Benincasa hispida). Race 4 was identified for the first time in the São Paulo state, Brazil. Genotypes A19, A30, A32, C67, C384, JAB-3, JAB-7, JAB-9, JAB-11, JAB-18, JAB-20 and Solarking showed to be resistant to the race 4.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Identificação De Raças De Oídio Das Cucurbitáceas E Reação Dmentioning

confidence: 99%

Section: Identificação De Raças De Oídio Das Cucurbitáceas E Reação Dmentioning

confidence: 99%

See 2 more Smart Citations

Cucurbits powdery mildew race identity and reaction of melon genotypes1

Rabelo

Santos

Diniz

et al. 2017

Pesqui. Agropecu. Trop.

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“…CPM species Px has a high evolutionary potential (McDonald and Linde, 2002) and is, therefore, likely to overcome such kind of race-specific resistance. This has been borne out in melon, for which the number of races has increased to such a large number that an international powdery race initiative was proposed based on a triple-septet set of melon cultivars, breeding lines, and accessions to objectively and systematically designate melon CPM races (Lebeda et al, 2016). The melon seed industry, working through the International Seed Federation and Center for Pathogen Strain Identification, University of California, Davis, initiated the development of a reduced set of melon CPM race differentials designed to identify the economically important races yet reveal presence of unique races (J.D.…”

Section: Discussionmentioning

confidence: 99%

Inheritance of Resistance to Cucurbit Powdery Mildew in Bitter Gourd

Dhillon¹,

Sanguansil²,

Srimat³

et al. 2019

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Additional index words. Momordica charantia, Podosphaera xanthii, race-specific resistance, allelic and non-allelic resistance Abstract. Cucurbit powdery mildew (CPM) caused by Podosphaera xanthii (Px) is an economically important disease of bitter gourd (BG; Momordica charantia) in Asia. Highlevel resistance to CPM is known in various BG accessions that have been used to develop BG breeding lines that originated in different countries. BG breeding lines THMC 113 (Belize), THMC 143 (India), THMC 153 (Thailand), THMC 167 (India), and THMC 170 (Taiwan) possess high-level resistance to BG Px race (BG-CPM), designated Mc-1 from a field at Kamphaeng Saen, Thailand, whereas THMC 144 (India) is susceptible. Our objective was to determine the inheritance of resistance to BG-CPM race Mc-1. To that end, THMC 144 (India) was crossed with the five resistant lines. The parents and their respective F 1 , F 2 , backcross progenies were evaluated for BG-CPM disease severity in inoculated field and growth chamber tests. Resistance to BG-CPM race Mc-1 in the five resistant lines was controlled by at least two independent, recessive genes. Intercrosses of the BG-CPM-resistant lines revealed allelic resistances in four of the breeding lines: THMC 113, THMC 153, THMC 167, and THMC 170. Resistance in THMC 143 was clearly non-allelic for resistance to BG-CPM with the other four BG-CPM-resistant lines.

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Genetic Resources of Pumpkins and Squash, Cucurbita spp.

Paris¹

2016

Plant Genetics and Genomics: Crops and Models

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Cucurbit powdery mildews: methodology for objective determination and denomination of races

Cited by 46 publications

References 32 publications

Cucurbits powdery mildew race identity and reaction of melon genotypes1

Cucurbits powdery mildew race identity and reaction of melon genotypes1

Inheritance of Resistance to Cucurbit Powdery Mildew in Bitter Gourd

Genetic Resources of Pumpkins and Squash, Cucurbita spp.

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