Genetic Variation for Resistance to Ear Rots and Mycotoxins Contamination in Early European Maize Inbred Lines

Bolduan, C.; Miedaner, Thomas; Schipprack, Wolfgang; Dhillon, B. S.; Melchinger, Albrecht E.

doi:10.2135/cropsci2008.12.0701

Cited by 60 publications

(101 citation statements)

References 36 publications

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“…The susceptible lines showed a lower stability across isolates. Because the tested maize inbred lines have been pre-selected for their ear rot reaction to F. graminearum and F. verticillioides as well (Bolduan et al 2009), they provide a maximum of variation among the current early maturing maize inbreds and, consequently, the results should be representative for modern German flint maize germplasm. Our results support the conclusion of Reid et al (1993) that genotypic differences in silk resistance to F. graminearum can be detected with almost any aggressive isolate.…”

Section: Discussionmentioning

confidence: 99%

“…All lines are early-maturing commercial inbreds developed by the University of Hohenheim. They were chosen for this experiment according to their diverse disease reaction to inoculation with the respective Fusarium species in a pilot study evaluating 42 inbreds towards F. graminearum and 21 inbreds towards F. verticillioides (Bolduan et al 2009). …”

Section: Plant Materials and Fungal Isolatesmentioning

confidence: 99%

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Aggressiveness and mycotoxin production of eight isolates each of Fusarium graminearum and Fusarium verticillioides for ear rot on susceptible and resistant early maize inbred lines

2010

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Fusarium graminearum and F. verticillioides are among the most important pathogens causing ear rot of maize in Central Europe. Our objectives were to (1) compare eight isolates of each species on two susceptible inbred lines for their variation in ear rot rating and mycotoxin production across 3 years, and (2) analyse two susceptible and three resistant inbred lines for potential isolate x line interactions across 2 years by silk-channel inoculation. Ear rot rating, zearalenone (ZEA) and deoxynivalenol (DON) concentrations were evaluated for all F. graminearum isolates. In addition, nivalenol (NIV) concentrations were analysed for two NIV producers. Fumonisin (FUM) concentrations were measured for all F. verticillioides isolates. Mean ear rot severity was highest for DON producers of F. graminearum (62.9% of the ear covered by mycelium), followed by NIV producers of the same species (24.2%) and lowest for F. verticillioides isolates (9.8%). For the latter species, ear rot severities differed highly among years (2006: 24%, 2007: 3%, 2008: 7%). Mycotoxin concentrations among isolates showed a broad range (DON: 100-284 mg kg −1 , NIV: 15-38 mg kg −1 , ZEA: 1.1-49.5 mg kg −1 , FUM: 14.5-57.5 mg kg −1 ). Genotypic variances were significant for isolates and inbred lines in all traits and for both species. Isolate x line interactions were significant only for ear rot rating (P<0.01) and DON concentration (P<0.05) of the F. graminearum isolates, but no rank reversals occurred. Most isolates were capable of differentiating the susceptible from the resistant lines for ear rot severity. For resistance screening, a sufficiently aggressive isolate should be used to warrant maximal differentiation among inbred lines. With respect to F. verticillioides infections, high FUM concentrations were found in grains from ears with minimal disease symptoms.

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Section: Discussionmentioning

confidence: 99%

Section: Plant Materials and Fungal Isolatesmentioning

confidence: 99%

Aggressiveness and mycotoxin production of eight isolates each of Fusarium graminearum and Fusarium verticillioides for ear rot on susceptible and resistant early maize inbred lines

2010

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“…Thereafter, a macroconidial spore suspension was prepared according to Reid et al (1996) and silk channel inoculation was performed as described by Bolduan et al (2009a). DH lines and testcrosses were inoculated by injecting 1 ml (100,000 conidia) 5-6 days after silk emergence into the silk channel of the primary ears of plants having a similar developmental stage.…”

Section: Inoculum Production and Inoculationmentioning

confidence: 99%

“…DH lines and testcrosses were inoculated by injecting 1 ml (100,000 conidia) 5-6 days after silk emergence into the silk channel of the primary ears of plants having a similar developmental stage. As recommended by Bolduan et al (2009a), the number of inoculated plants under study should not fall below five in order to account for variation due to biological factors and variable plantto-plant growing conditions. In the DH lines, six and eight plants per plot were inoculated in 2008 and 2009, respectively.…”

Section: Inoculum Production and Inoculationmentioning

confidence: 99%

Variation and covariation for Gibberella ear rot resistance and agronomic traits in testcrosses of doubled haploid maize lines

et al. 2012

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Gibberella ear rot (GER) of maize caused by Fusarium graminearum reduces grain yield and leads to contamination of the grains with deoxynivalenol (DON), a mycotoxin that adversely affects the health of humans and animals. The objectives of this study were to (1) analyze means and genotypic variances for line per se performance (LP) and testcross performance (TP) of doubled haploid (DH) lines for GER severity and DON concentration as well as for some agronomic traits, (2) examine correlations among these traits, (3) validate QTL for resistance detected in previous studies for LP and their effect on TP and (4) investigate the relative efficiency of indirect selection (RE) for LP to improve TP. Testcross progenies of 94 DH lines originating from four flint populations were developed using a susceptible dent tester as pollinator. Artificial inoculations with F. graminearum led to appreciable disease development. Average TP for GER severity and DON concentration were lower than the mean midparent values of the tester and DH lines, indicating mid-parent heterosis for resistance. Genotypic variation for resistance was significant for LP and TP. Genotypic correlations between LP and TP were low and resistance QTL for LP had no significant effects on TP. Accordingly, RE for resistance was low, suggesting to allocate resources mostly to the evaluation of testcrosses. Correlations of resistance to GER and DON contamination with grain yield (measured under non-inoculated conditions) were not significant, indicating that selection for resistance and higher grain yield can be carried out simultaneously.

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“…However, Magg et al (2002) and Papst et al (2005) observed reduced concentration only of some mycotoxins but not of others. Breeding and growing resistant maize varieties is the best alternative to reduce yield loss and mycotoxin contamination (Bolduan, 2008).…”

Section: Introductionmentioning

confidence: 99%

The Reaction of some Maize Hybrids, Created at ARDS TURDA, to Fusarium spp. Infection

Şopterean¹,

Suciu²,

Vălean³

et al. 2017

UASVMCN-AGR

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The most important disease of maize in Romania are stalk and ear rot, which caused yield losses in average of 20%. The resistant hibrids represent one of the most efficient solution for reducing the field loses caused by Fusarium spp. on the maize (Nagy et al., 2006). Diseases caused by Fusarium spp. can affect the yield and grain quality of maize because of contamination with numerous mycotoxins produced by these fungi (Czembor et al., 2015). The purpose of this paper was to know more about the reaction of different maize hybrids to Fusarium and the evaluating the effect of ear rot on the yield ability and mycotoxins accumulation. The experiments carried out at ARDS Turda, during four years (2012)(2013)(2014)(2015). The biological material was represented by 8 hybrids, from different maturity groups, tested in two infection conditions with Fusarium spp. (natural and artificial infections). The temperature and rainfalls of the four years of experiments corresponding to the vegetation of maize (aprilseptember) are influenced favourably the pathogenesis of stalk and ear rot caused by Fusarium spp. and a good discrimination of the resistance reaction of genotypes. Fusarium ear rot has significantly affected production capacity and chemical composition of corn hybrids tested. In conditions of artificial infection with Fusarium spp. was a decrease in the content of starch, fat and increased protein content compared with artificially inoculated variants. The quantity of fumonizin B1+B2 has reached to 5630 μg/kg in conditions of artificial infection. There are negative correlations between production capacity and degree of attack of fusarium ear rot; depending on the reacting genotypes tested increasing disease causes production decrease. The response of maize hybrids to Fusarium infection is influenced by infection and climatic conditions. These factors affect production both in terms of quantity and quality and accumulation of mycotoxins.

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Genetic Variation for Resistance to Ear Rots and Mycotoxins Contamination in Early European Maize Inbred Lines

Cited by 60 publications

References 36 publications

Aggressiveness and mycotoxin production of eight isolates each of Fusarium graminearum and Fusarium verticillioides for ear rot on susceptible and resistant early maize inbred lines

Aggressiveness and mycotoxin production of eight isolates each of Fusarium graminearum and Fusarium verticillioides for ear rot on susceptible and resistant early maize inbred lines

Variation and covariation for Gibberella ear rot resistance and agronomic traits in testcrosses of doubled haploid maize lines

The Reaction of some Maize Hybrids, Created at ARDS TURDA, to Fusarium spp. Infection

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