Genetic resistance of maize inbred lines to anthracnose leaf blight

Prochno, Hellen Christine; Coelho, Caroline de Jesus; Romanek, Cristiane; Silva, Danilo Fernando Guimarães; Tasior, Daniele; Oliveira, E. A.; Gardingo, José Raulindo; Matiello, Rodrigo Rodrigues

doi:10.1590/1984-70332016v16n1a9

Cited by 5 publications

(8 citation statements)

References 15 publications

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“…The analysis of frequency distribution confirmed the phenotypic contrast for resistance to ALB between the lines L R 04-2 and L S 95-1, regardless of the experimental year (Prochno et al 2016). The frequency distribution for AUDPC presented a normal distribution by Shapiro-Wilk test at 5% of probability.…”

Section: Resistance Of Progenies To Anthracnose Leaf Blightsupporting

confidence: 61%

“…Inbred lines of tropical maize, belonging to the C. graminicola resistance breeding program of State University of Ponta Grossa, originated from south of Brazil maize landraces, were initially screened for stalk rot and ALB (Prochno et al 2016). The ALB contrasting inbred lines L R 04-2 (resistant) and L S 95-1 (susceptible) were crossed to obtain the segregating population of F 2 generation.…”

Section: Plant Materialsmentioning

confidence: 99%

“…In Brazil, this is the first report of quantitative inheritance to ALB resistance from tropical maize germplasm. Possibly the wide genetic base of this germplasm would explain the large number of QTL for resistance to ALB (Prochno et al 2016). …”

Section: Qtl Mappingmentioning

confidence: 99%

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QTL mapping to anthracnose leaf blight resistance in tropical maize

Romanek

Matiello

Coelho

et al. 2017

Crop Breed. Appl. Biotechnol.

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Section: Resistance Of Progenies To Anthracnose Leaf Blightsupporting

confidence: 61%

Section: Plant Materialsmentioning

confidence: 99%

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QTL mapping to anthracnose leaf blight resistance in tropical maize

Romanek

Matiello

Coelho

et al. 2017

Crop Breed. Appl. Biotechnol.

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“…It occurs because these pathogenic organisms reduce photosynthetic area and, consequently, synthesis and translocation of assimilates (GOMES et al, 2011). In many cases, the damages are considered as indirect because the reduction in leaf area predisposes the plants to stem and ear rot pathogens (PROCHNO et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Genetic resistance is effective to control maize leaf diseases (PROCHNO et al, 2016); therefore, genetic breeding programs seek to develop inbred lines and hybrids with higher resistance levels (SILVEIRA et al, 2006). Several studies in the literature point to a genetic variability for resistance to leaf diseases in some maize cultivars (NIHEI;FERREIRA, 2012;VIEIRA et al, 2012), but a few of them approach the genetic resistance of inbred lines (SILVEIRA et al, 2006;VIVEK et al, 2010;SAITO et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Severity of leaf diseases in maize inbred lines with different kernel hardness in two sowing seasons

Spada

Faria

Mendes

et al. 2018

SCA

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Resistance of maize inbred lines to major leaf diseases should be characterized for the development of new hybrids in breeding programs. Thus, this study aimed to assess the severity of leaf diseases in maize inbredlines with different kernel hardnessand two sowingseasons. We assessed four inbred lines and one check hybrid with dent kernels and four inbred lines and a check hybrid with flint kernels. Treatments were conducted in two sowing seasons, one in October, and another in December 2013. The symptoms of gray leaf spot (Cercospora zeae-maydis), northern leaf blight (Exserohilum turcicum), and white leaf spot (a complex of Phaeosphaeria maydis and Pantoea ananatis) were assessed every 10 days from flowering. The area under the disease progress curve was also calculated. Severity level of the diseases was higher in inbred lines when compared to the check hybrds (AG8041 PRO and P30R50YH), regardless of kernel hardness. Dent-kernel inbred lines showed a higher severity of northern leaf blight symptoms when compared to flint-kernelones. It is worth mentioning that disease severity increased as sowing was delayed. Keywords: Cercospora zeae-maydis. Exserohilum turcicum. Pantoea ananatis. Phaeosphaeria maydis. Zea mays. ResumoA caracterização de linhagens de milho quanto à resistência às principais doenças é fundamental para o desenvolvimento de novos híbridos em programas de melhoramento. Assim, o objetivo deste trabalho foi avaliar a severidade de doenças foliares em linhagens de milho com diferentes texturas de grãos em duas épocas de semeadura. Foram avaliadas quatro linhagens e um híbrido testemunha com grãos dentados e quatro linhagens e um híbrido testemunha com grãos duros. Os tratamentos foram conduzidos em duas épocas de semeadura, em outubro e em dezembro de 2013. A partir do florescimento, a cada 10 dias, foram avaliadas as doenças foliares cercosporiose (Cercospora zeae-maydis), helmintosporiose (Exserohilum turcicum) e mancha branca (complexo Phaeosphaeria maydis/Pantoea ananatis). Foi calculada a área abaixo da curva do progresso das doenças (AACPD foi maior nas linhagens, comparativamente aos híbridos testemunhas AG8041 PRO e P30R50YH, independentemente da textura dos grãos. As linhagens de textura dentada apresentaram maior severidade de sintomas da helmintosporiose, quando comparada às linhagens de grãos duros. Houve aumento da severidade das doenças avaliadas com o atraso da semeadura.

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Steroidal glycoalkaloids contribute to anthracnose resistance in Solanum lycopersicum

Fabian

Zhang

Sun

et al. 2023

Journal of Experimental Botany

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Anthracnose is a widespread plant disease caused by various species of the fungal pathogen Colletotrichum spp. In solanaceous plants such as tomato (Solanum lycopersicum), Colletotrichum infections exhibit a quiescent, asymptomatic state in developing fruit, followed by a transition to necrotrophic infections in ripe fruit. Through analysis of fruit tissue extracts of 95L368, a tomato breeding line that yields fruit with enhanced anthracnose resistance, we identified a role for steroidal glycoalkaloids (SGAs) in anthracnose resistance. The SGA α-tomatine and several of its derivatives accumulated at higher levels, in comparison to fruit of the susceptible tomato cultivar US28, 95L368 fruit extracts with fungistatic activity against Colletotrichum. Correspondingly, ripe and unripe 95L368 fruit displayed enhanced expression of glycoalkaloid metabolic enzyme (GAME) genes, which encode key enzymes in SGA biosynthesis. Metabolomics analysis incorporating recombinant inbred lines (RILs) generated from 95L368 and US28 yielded strong positive correlations between anthracnose resistance and accumulation of α-tomatine and several derivatives. Lastly, transient silencing of expression of the GAME genes GAME31 and GAME5 in anthracnose-susceptible tomato fruit yielded enhancements to anthracnose resistance. Together, our data support a role for SGAs in anthracnose defense in tomato, with a distinct SGA metabolomic profile conferring resistance to virulent Colletotrichum infections in ripe fruit.

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Genetic resistance of maize inbred lines to anthracnose leaf blight

Abstract: -

Cited by 5 publications

References 15 publications

QTL mapping to anthracnose leaf blight resistance in tropical maize

QTL mapping to anthracnose leaf blight resistance in tropical maize

Severity of leaf diseases in maize inbred lines with different kernel hardness in two sowing seasons

Steroidal glycoalkaloids contribute to anthracnose resistance in Solanum lycopersicum

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