Interaction between resistance to Septoria tritici and phenological stages in wheat

Gieco, Jorge Omar; Dubcovsky, Jorge; Camargo, Luís Eduardo Aranha

doi:10.1590/s0103-90162004000400011

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…Anthracnose resistance can be evaluated with parameters such as expression of symptoms, lesion expansion, and amount of sporulation (Thomas et al 2008), and the interaction of these parameters with plant age affects disease severity (Wastie 1991). Examples of such interactions include: potato plants and late blight (Phytophthora infestans), where young plants are susceptible, later becoming more resistant, and then older plants become susceptible again (Stewart 1990); bean cultivars inoculated with C. lindemuthianum showing differential resistance related to the developmental stages of the plants (Bigirimana and Hofte 2001); and wheat being susceptible to Septoria tritici at the seedling stage but resistant in the tillering and flag leaf stages (Gieco et al 2004). Appropriate methodologies should be developed to evaluate disease resistance for each crop-disease system.…”

Section: Introductionmentioning

confidence: 99%

Influence of plant growth stage on resistance to anthracnose in Andean lupin (Lupinus mutabilis)

2015

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Anthracnose, caused by Colletotrichum acutatum, is the most destructive fungal disease of Andean lupin (Lupinus mutabilis Sweet) in Ecuador and of other lupin species around the world. Symptoms of necrotic spots occur throughout the main stem, and infection progresses to cause bending of the main stem and lateral branches, resulting in yield loss. Although there is no known anthracnose resistance, this study aims to assess tolerance of Andean lupin and investigate lupin–C. acutatum interactions. Two Andean lupin genotypes, I-450 Andino and I-451 Guaranguito, were inoculated on the meristematic section of the main stem, either by spraying or by pipetting C. acutatum spores on to an artificial wound. Although the two methods gave similar results, spraying is the preferred method because it mimics natural pathogen infection. Plant-pathogen interactions were assessed at five different phenological stages (leaf stages 2–3, 4–5, 6–7, 8–9, and 10–11) with three C. acutatum isolates by using a 0–5 scale to assess disease symptoms. In both genotypes, anthracnose symptoms were greater at early seedling stage (2–3-leaf stage), decreasing significantly in early vegetative phase (6–7-leaf stage) and increasing again when the flower stage began (10–11-leaf stage). However, the tolerance of these two Andean lupin genotypes to anthracnose was not equally expressed at all developmental stages. We recommend, in a breeding program, that screening for anthracnose first occurs at the 6–7-leaf stage (6 weeks old) and again when flowering starts at the 10–11-leaf stage (10 weeks old) so that the overall tolerance can be determined. This method could be used in lupin breeding programs for improving resistance to anthracnose.

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Section: Introductionmentioning

confidence: 99%

Influence of plant growth stage on resistance to anthracnose in Andean lupin (Lupinus mutabilis)

2015

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“…The disease spreads from lower to upper leaves mainly by rainsplash. In addition to the weather, disease severity is affected by the virulence of the fungal genotype (van Baalen and Sabelis 1995), susceptibility of the cultivar and the phenological stage at which the infection occurs (Gieco et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Influence of fungicide treatments on disease severity caused by Zymoseptoria tritici, and on grain yield and quality parameters of bread-making wheat under Mediterranean conditions

et al. 2014

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Zymoseptoria tritici is a major fungal pathogen which can cause serious loss in bread-making wheat. In this study, field experiments were conducted over two growing seasons to evaluate the effect of fungicide treatment (1-or 2-sprays of prothioconazole and tebuconazole) on Septoria leaf blotch (SLB) severity, wheat grain yield, hectolitre weight, crude protein and on the SDS (sodium dodecyl sulphate) sedimentation test. The influence of cultivar resistance on fungicide efficacy under Mediterranean conditions was also analysed. The results showed that in years drier than average, fungicide application might not be recommended as SLB severity would be low and the fungicide application itself could reduce grain yield. At highseverity of SLB, one spray of prothioconazole + tebuconazole applied between anthesis and maturation reduced disease severity by more than 50 % and increased grain yield by approximately 20 %. Fungicide treatment did not affect the quality parameters of the grain, measured as crude protein and by the SDS sedimentation test, under these experiment conditions.

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“…For that reason, when proposing the diagrammatic scale for evaluation of ALS resistance in the V2 stage of bean, Librelon et al (2015) reported that the plants tend to have more severe symptoms in early plant growth stages. Da explained this phenomenon as a "resistance of the adult plant" mechanism and, according to Gieco et al (2004), it is essential to evaluate disease resistance in more than one PGS to make correct classification.…”

Section: Degrees Of Resistance Throughout the Plant Growthmentioning

confidence: 99%

Angular Leaf Spot Resistance Loci Associated With Different Plant Growth Stages in Common Bean

et al. 2021

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Angular leaf spot (ALS) is a disease that causes major yield losses in the common bean crop. Studies based on different isolates and populations have already been carried out to elucidate the genetic mechanisms of resistance to ALS. However, understanding of the interaction of this resistance with the reproductive stages of common bean is lacking. The aim of the present study was to identify ALS resistance loci at different plant growth stages (PGS) by association and linkage mapping approaches. An BC2F3 inter-gene pool cross population (AND 277 × IAC-Milênio – AM population) profiled with 1,091 SNPs from genotyping by sequencing (GBS) was used for linkage mapping, and a carioca diversity panel (CDP) genotyped by 5,398 SNPs from BeadChip assay technology was used for association mapping. Both populations were evaluated for ALS resistance at the V2 and V3 PGSs (controlled conditions) and R8 PGS (field conditions). Different QTL (quantitative trait loci) were detected for the three PGSs and both populations, showing a different quantitative profile of the disease at different plant growth stages. For the three PGS, multiple interval mapping (MIM) identified seven significant QTL, and the Genome-wide association study (GWAS) identified fourteen associate SNPs. Several loci validated regions of previous studies, and Phg-1, Phg-2, Phg-4, and Phg-5, among the 5 loci of greatest effects reported in the literature, were detected in the CDP. The AND 277 cultivar contained both the Phg-1 and the Phg-5 QTL, which is reported for the first time in the descendant cultivar CAL143 as ALS10.1UC. The novel QTL named ALS11.1AM was located at the beginning of chromosome Pv11. Gene annotation revealed several putative resistance genes involved in the ALS response at the three PGSs, and with the markers and loci identified, new specific molecular markers can be developed, representing a powerful tool for common bean crop improvement and for gain in ALS resistance.

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Interaction between resistance to Septoria tritici and phenological stages in wheat

Cited by 7 publications

References 22 publications

Influence of plant growth stage on resistance to anthracnose in Andean lupin (Lupinus mutabilis)

Influence of plant growth stage on resistance to anthracnose in Andean lupin (Lupinus mutabilis)

Influence of fungicide treatments on disease severity caused by Zymoseptoria tritici, and on grain yield and quality parameters of bread-making wheat under Mediterranean conditions

Angular Leaf Spot Resistance Loci Associated With Different Plant Growth Stages in Common Bean

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