Parasitic and Biological Fitness of Venturia inaequalis: Relationship to Disease Management Strategies

MacHardy, W. E.; Gadoury, David M.; Gessler, C.

doi:10.1094/pdis.2001.85.10.1036

Cited by 133 publications

(84 citation statements)

References 40 publications

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“…Ricker et al (1985) observed larger lesion size at lower inoculum densities of Cercospora arachidicola. Effects of temperature, rainfall, relative humidity, sun shine hour and leaf wetness on the incidence and severity of disease in different pathosystems have been reported by many researchers (MacHardy et al, 2001;Mondal and Timmer, 2002;Chowdhury and Hossain, 2011). Similar prevalence of sigatika disease caused by Cercospora musae (Akter, 2011) and black sigatoka disease caused by Mycosphaerella fijiensis in banana (Jacome and Schuh, 1992) had been reported to be influenced by excessive rain, humidity and temperature.…”

Section: 4mentioning

confidence: 94%

“…The climate of Bangladesh harbors plant pathogen and provides luxuriant environment for the growth and reproduction of large number of plant pathogens which cause hundreds of different diseases of crops (Fakir, 2001). Determining the effect of weather parameters on the formation, release and germination of inoculum in different pathosystems have been focused by many researchers in worldwide (Pinkerton et al, 1998;MacHardy et al, 2001;Mondal and Timmer, 2002). Plant disease play an important role in reducing yield of horticultural crops in the tropics.…”

Section: The Agriculturists 13(2)mentioning

confidence: 99%

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Impact of Weather on Sigatoka Leaf Spot of Banana (Musa spp. L.) and its Ecofriendly Management

2016

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A study was carried out during July 2010 to April 2012 to understand the effect of weather prevalence on sigatoka disease of banana suckers in different areas of Bangladesh and to develop an environment friendly disease management practice. Four locations viz. Dinajpur, Bogra, Rangpur and Madhupur were surveyed. To find out suitable and ecofriendly management practices for controlling sigatoka disease of banana, seven treatments were used viz. i) Soil drenching with BAU-Biofungicide (2%), ii) BAU-Biofungicide as foliar spray (2%), iii) Soil drenching with BAU-Biofungicide (2%) plus foliar spray (2%), iv) Bavistin (carbendazim) spray (0.2%), v) Dithane M-45 (mancozeb) spray (0.2%), vi) Soil drenching with BAU-Biofungicide (2%) plus Bavistin spray (0.2%); and vii) control. The average highest incidence (26.42%) and severity (22.84%) of sigatoka disease of banana suckers were recorded during October at Bogra, while the lowest incidence (9.75 %) and severity (8.51%) were recorded during January at Dinajpur. Out of the control measures employed, BAU-Biofungicide (2%) either alone or in combination with Bavistin (0.2%) was found as an excellent biocontrol means for controlling sigatoka disease of banana suckers.

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Section: 4mentioning

confidence: 94%

Section: The Agriculturists 13(2)mentioning

confidence: 99%

Impact of Weather on Sigatoka Leaf Spot of Banana (Musa spp. L.) and its Ecofriendly Management

2016

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“…These markers may (1) not be homologous to R genes, or correspond to R gene-like sequences that evolved to confer functions other than disease resistance; (2) belong to isolated pseudogenes; or (3) correspond or map close to functional but so far undetected resistance loci. Some of those undetected loci might belong to the large range of overcome, 'ephemeral' resistance genes which have been postulated in apple (MacHardy et al 2001). Provided that the mapped NBS markers are real RGAs, they could predict the existence of functional resistance genes or QTL, which have been undetected so far.…”

Section: Most Of the Nbs Markers Are Rgasmentioning

confidence: 99%

Resistance gene analogues identified through the NBS-profiling method map close to major genes and QTL for disease resistance in apple

Calenge

Linden²,

Weg³

et al. 2005

Theor Appl Genet

100

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We used a new method called nucleotidebinding site (NBS) profiling to identify and map resistance gene analogues (RGAs) in apple. This method simultaneously allows the amplification and the mapping of genetic markers anchored in the conserved NBSencoding domain of plant disease resistance genes. Ninety-four individuals belonging to an F 1 progeny derived from a cross between the apple cultivars 'Discovery' and 'TN10-8' were studied. Two degenerate primers designed from the highly conserved P-loop motif within the NBS domain were used together with adapter primers. Forty-three markers generated with NBS profiling could be mapped in this progeny. After sequencing, 23 markers were identified as RGAs, based on their homologies with known resistance genes or NBS/leucine-rich-repeat-like genes. Markers were mapped on 10 of the 17 linkage groups of the apple genetic map used. Most of these markers were organized in clusters. Twenty-five markers mapped close to major genes or quantitative trait loci for resistance to scab and mildew previously identified in different apple progenies. Several markers could become efficient tools for markerassisted selection once converted into breeder-friendly markers. This study demonstrates the efficiency of the NBS-profiling method for generating RGA markers for resistance loci in apple.

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“…Consequently, new resistance breeding strategies have to be set up. A promising way is the incorporation of two or more resistance genes in the same cultivar or selection, the socalled pyramiding of resistance genes (MacHardy et al 2001). This strategy should delay, or even prevent, the breakdown of the resistance genes.…”

Section: Introductionmentioning

confidence: 99%

Molecular markers linked to the apple scab resistance gene Vbj derived from Malus baccata jackii

et al. 2004

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Breeding for scab-resistant apple cultivars by pyramiding several resistance genes in the same genetic background is a promising way to control apple scab caused by the fungus Venturia inaequalis. To achieve this goal, DNA markers linked to the genes of interest are required in order to select seedlings with the desired resistance allele combinations. For several apple scab resistance genes, molecular markers are already available; but until now, none existed for the apple scab resistance gene Vbj originating from the crab apple Malus baccata jackii. Using bulk segregant analysis, three RAPD markers linked to Vbj were first identified. These markers were transformed into more reliable sequence-characterised amplified region (SCAR) markers that proved to be codominant. In addition, three SSR markers and one SCAR were identified by comparing homologous linkage groups of existing genetic maps. Discarding plants showing genotype-phenotype incongruence (GPI plants) plants, a linkage map was calculated. Vbj mapped between the markers CH05e03 (SSR) and T6-SCAR, at 0.6 cM from CH05e03 and at 3.9 cM from T6-SCAR. Without the removal of the GPI plants, Vbj was placed 15 cM away from the closest markers. Problems and pitfalls due to GPI plants and the consequences for mapping the resistance gene accurately are discussed. Finally, the usefulness of co-dominant markers for pedigree analysis is also demonstrated.

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Parasitic and Biological Fitness of Venturia inaequalis: Relationship to Disease Management Strategies

Cited by 133 publications

References 40 publications

Impact of Weather on Sigatoka Leaf Spot of Banana (<i>Musa</i> spp. L.) and its Ecofriendly Management

Impact of Weather on Sigatoka Leaf Spot of Banana (<i>Musa</i> spp. L.) and its Ecofriendly Management

Resistance gene analogues identified through the NBS-profiling method map close to major genes and QTL for disease resistance in apple

Molecular markers linked to the apple scab resistance gene Vbj derived from Malus baccata jackii

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