Isolate and organ-specific QTLs for ascochyta blight resistance in faba bean (Vicia faba L).

Ávila, Carmen M.; Šatović, Zlatko; Sillero, Josefina C.; Rubiales, Diego; Moreno, M. T.; Torres, A. M.

doi:10.1007/s00122-003-1514-7

Cited by 89 publications

(68 citation statements)

References 47 publications

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“…A detailed analysis of resistance using an F 2 population from the cross of 29H (resistant) · VF136 (susceptible) was used to identify six QTL (Avila et al 2004). The F 2 population was evaluated for resistance to two isolates differing in their pathogenicity.…”

Section: Faba Beanmentioning

confidence: 99%

Resistance to ascochyta blights of cool season food legumes

Muehlbauer

Chen

2007

Eur J Plant Pathol

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Ascochyta blights are the most important diseases of cool season food legumes (peas, lentils, chickpeas, and faba beans) and are found in nearly all production regions. Despite having the same common disease name, the pathogen species differ for each of the crops. These diseases cause serious yield losses under favourable cool and humid conditions. Planting resistant cultivars is often the first choice and most economical means in managing the diseases. Therefore breeding for resistance to ascochyta blights has been an important objective of many cool season food legume research programmes. Systematic screening of germplasm collections at international research centres and other national research programmes have identified useful resistance sources that have been used successfully to breed resistant or tolerant cultivars. Genetic studies have revealed inheritance patterns of the resistance genes. Genetic linkage analyses and QTL mapping have identified molecular markers that could be useful for markerassisted selection and gene pyramiding. In general, research towards developing resistance to ascochyta blights in cool season food legume faces mainly two limitations: the lack of availability of efficient resistance sources and the lack of a good understanding of the variability of the pathogen populations. Research efforts to alleviate these limitations should be pursued. Given that modern technologies of marker development and genomics are available, further advances in deploying resistance to manage ascochyta blights in this group of legume crops will depend on concerted efforts in developing accurate screening procedures with adequate knowledge of pathogen variability and identification of additional sources of resistance.

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Section: Faba Beanmentioning

confidence: 99%

Resistance to ascochyta blights of cool season food legumes

Muehlbauer

Chen

2007

Eur J Plant Pathol

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“…Resistance to Ascochyta fabae, the causal agent of ascochyta blight on fababean (Vicia fabae), was under different genetic control on leaves compared with stems (Rashid et al 1991;Kohpina et al 2000). Out of the six quantitative trait loci (QTL) for resistance to AB detected in fababean, four were effective in both leaves and stems, while one QTL was effective only in leaves, and the other was effective only in stems (Avila et al 2004). Organ-specific gene expression in response to A. rabiei in chickpea has not been reported.…”

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confidence: 99%

Improved sources of resistance to ascochyta blight in chickpea

Chandirasekaran¹,

Warkentin²,

Gan³

et al. 2009

Can. J. Plant Sci.

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Tar'an, B. and Banniza, S. 2009. Improved sources of resistance to ascochyta blight in chickpea. Can. J. Plant Sci. 89: 107Á118. Successful chickpea production in western Canada typically requires multiple applications of fungicides to minimize the severity of ascochyta blight (AB) caused by Ascochyta rabiei (Pass.) Lab. Although planting resistant cultivars could be economical and environmentally safer than fungicide use, varieties with a high level of resistance are not available. The objective of this research was to identify potentially useful parents for breeding programs aimed at the northern Great Plains by assessing the AB reaction of 12 desi and 12 kabuli chickpea varieties for their AB reaction on leaves, stems and pods under two fungicide regimes. The experiment was conducted at Swift Current and Shaunavon, Saskatchewan, in 2004 and. Differences in AB severity on leaves, stems and pods, seed yield and 1000-seed weight occurred among varieties at all site-years tested. The variation was greater among kabuli varieties than desi varieties. Ascochyta blight severity was generally lower under the high fungicide regime. A positive correlation in AB severity on leaves, stems and pods was observed, suggesting a lack of organ-specific reaction. Several promising varieties that combined improved levels of AB resistance, high yield, and large seed size were identified. Toutes les varie´te´s ont re´agi diffe´remment al 'ascochytose, la gravite´des symptoˆmes variant au niveau des feuilles, des tiges, des gousses, du rendement grainier et du poids de 1 000 graines a`toutes les anne´es-sites. La re´action des cultivars kabuli variait plus que celle des cultivars desi. En ge´ne´ral, l'ascochytose cause moins de dommages quand on applique plus de fongicide. Il existe une corre´lation positive entre la gravite´de l'ascochytose sur les feuilles, les tiges et les gousses, ce qui laisse croire que la maladie n'affecte pas spe´cifiquement certains organes. Plusieurs varie´te´s prometteuses combinant une meilleure re´sistance a`la maladie, un rendement e´leve´et des graines de gros calibre ont pu eˆtre identifie´es.

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“…Several examples of gene-marker associations have been reported (reviewed in Torres et al 2006Torres et al , 2010. A range of RAPDs and SCARs linked to genes or QTL controlling resistance to broomrape (Román et al 2002), ascochyta (Román et al 2003;Avila et al 2004), and rust are available and could be utilized in MAS strategies (Torres et al 2006 and references therein). Nevertheless, QTL found in a single environment must first be validated across multiple test locations and independent mapping populations before they can be successfully applied in MAS.…”

Section: Resistance To Parasites and Diseasesmentioning

confidence: 99%