Variation in Aggressiveness Among Isolates of <i>Cercospora</i> from Maize as a Potential Cause of Genotype-Environment Interaction in Gray Leaf Spot Trials

Carson, M. L.; Goodman, M. M.; Williamson, S. M.

doi:10.1094/pdis.2002.86.10.1089

Cited by 38 publications

(32 citation statements)

References 20 publications

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“…There was significant effect for genotype × location for grain yield. This finding was similar to findings of Carson et al (2002). The significantly different G × E interactions was recorded for grain yield in maize (Makumbi, 2005;Menkir & Ayodele, 2005).…”

Section: Resultssupporting

confidence: 88%

Genotype × environment interaction of quality protein maize grain yield in Nepal

Shrestha¹,

Kunwar²,

Upadhyaya³

et al. 2016

J. Maize Res. & Dev.

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In order to determine G × E interaction of quality protein maize grain yield, six maize genotypes were evaluated under different environments of three Terai (Chitwan, Surkhet and Doti) and four mid hill (Dhankuta, Lalitpur, Dolakha and Kaski) districts of Nepal during summer seasons of 2014 and 2015. The experiments were conducted using randomized complete block design along with three replications. The genotypes namely S99TLYQ-B, S99TLYQ-HG-AB and S03TLYQ-AB-01 were identified high yielding and better adapted genotypes for Terai environments with grain yield of 4199 kg ha -1 , 3715 kg ha -1 , and 3336 kg ha -1 respectively and S99TLYQ-B and S03TLYQ-AB-01 for mid hill environments with grain yield of 4547 kg ha -1 and 4365 kg ha -1 respectively. Therefore, these genotypes can be suggested for cultivation in their respective environments in the country.

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Section: Resultssupporting

confidence: 88%

Genotype × environment interaction of quality protein maize grain yield in Nepal

Shrestha¹,

Kunwar²,

Upadhyaya³

et al. 2016

J. Maize Res. & Dev.

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“…Carson et al (2002) and Brunelli et al (2008) previously observed that some isolates from the former group II, now C. zeina, did not produce Cercosporin.…”

Section: Introductionmentioning

confidence: 93%

Induction and detection of toxin in Cercospora zeina and Cercospora sorghi f. sp. maydis

Koshikumo

Alves

Pinho

2014

Agraria

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Cercosporin is a phytotoxin with toxic activity against large number of organism, it is produced by hypha in the culture medium. This way, the objective of this study was to induce the production of Cercosporin in Cercospora zeina (CZ) and Cercospora sorghi f. sp. maydis (CS) in 16 culture media, and to verify which medium is most suitable for detection of the toxin. Agar plugs were extracted and they were put in KOH for 16 hours. Cercosporin concentration was determined by using a molar extinction coefficient of 23300 L mol -1 . Under the conditions in which the fungi were cultured, it was not possible to induce the toxin in CZ, which reinforces the hypothesis that the toxin is only produced in planta. CS produced a high concentration of toxin in coconut water Sococo ® medium with yeast extract, 177.34 nmol plug -1. Only the M1D medium did not produce the toxin. There was a difference in the production of toxin depending on the brand and concentration of PDA medium. It is concluded that the media with coconut water Sococo ® are efficient in the induction of Cercosporin in vitro by CS, which are promising for research in this area. Furthermore, CZ did not produce the toxin in the studied conditions. Key words: Cercosporin, maize gray leaf spot, Zea mays L. Indução e detecção de toxina em Cercospora zeinae Cercospora sorghi f. sp. maydis RESUMO A cercosporina é uma fitoxina com atividade tóxica contra um amplo espectro de organismos, produzida pelas hifas em meio de cultura. O objetivo deste estudo foi induzir a toxina em Cercospora zeina (CZ) e Cercospora sorghi f. sp. maydis (CS) em 16 meios de cultura e averiguar qual o meio mais adequado para se detectar a toxina. Discos miceliais foram imersos em KOH por 16 horas e a concentração de toxina foi calculada utilizando-se o coeficiente de 23.300 L mol -1 . Nas condições em que foram submetidos os fungos não foi possível induzir a toxina em CZ, fato que reforça a hipótese de que a toxina é produzida apenas em planta. Em CS, a produção de toxina foi intensa nos meios com água de coco da marca Sococo ® , principalmente quando foi adicionado extrato de leveduras, apresentando 177.34 nmol disco -1 enquanto o meio M1D não foi capaz de induzir a toxina. A diferença na produção de toxina em BDA é devida à concentração e às marcas comerciais diferentes. Conclui-se que os meios com água de coco Sococo ® são eficientes na indução da Cercosporina in vitro por CS, o que constitui uma substância promissora para estudos dessa linha de pesquisa; além disto, CZ não produziu a toxina nas condições estudadas neste trabalho. Palavras-chave:Cercosporiose do milho, Zea mays L., Cercosporina

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“…Since most sources of resistance to C. zeae-maydis are considered to be quantitative, and no races of the pathogen are known at this time, the only difference among isolates is considered to be aggressiveness (Bair and Ayers, 1986;Dunkle and Carson, 1998;Carson et al, 2002). Based on current knowledge, it is likely that resistance to this pathogen will remain durable (Brown, 1995).…”

Section: Improving Host Resistancementioning

confidence: 99%

Use of IPM in the control of multiple diseases in maize: Strategies for selection of host resistance

Pratt

Gordon

Lipps

et al. 2004

African Crop Science Journal

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Maize (Zea mays) production in sub-Saharan Africa is constantly threatened by the potential outbreak of multiple foliar diseases such as maize streak, northern leaf blight, gray leaf spot, and rust. Improvement of host resistance to these diseases can provide an important component of integrated pest management (IPM). In this paper, conventional and molecular marker-assisted breeding approaches are reviewed and strategies for improvement of host resistance are presented. Pyramiding of quantitative resistance factors using molecular breeding techniques will be facilitated through cooperative research efforts and adoption of appropriate experimental designs.Key Words: Cercospora zeae-maydis, Exserohilum turcicum, gene pyramiding, molecular breeding, resistance breeding, Setosphaeria turcica RÉSUMÉLa production du maïs (Zea mays) en Afrique au sud du sahara est constamment menacée par l'apparution de multiple infections des feuilles par le streak, le mildiou, le brunissement des feuilles et moisissures. L'augmentation de la résistance a cette maladie peut apporter une importante composante de gestion intégrée de la peste (IPM). Dans cet article, l'approche de croisement assiste des marqueurs conventionels et moléculaires sont présentés et les stratégies d'amélioration de la résistance de la plante hote sont présentées. Les facteurs de résistances pyramidiques et quantitatives utilisant la technique de croisement moléculaires seront facilités à travers les efforts de recherches coopératives et l'adoption d'une approache expérimentale appropriée.

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Variation in Aggressiveness Among Isolates of Cercospora from Maize as a Potential Cause of Genotype-Environment Interaction in Gray Leaf Spot Trials

Cited by 38 publications

References 20 publications

Genotype × environment interaction of quality protein maize grain yield in Nepal

Genotype × environment interaction of quality protein maize grain yield in Nepal

Induction and detection of toxin in Cercospora zeina and Cercospora sorghi f. sp. maydis

Use of IPM in the control of multiple diseases in maize: Strategies for selection of host resistance

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