Registration of Mp420 Germplasm Line of Maize

Scott, Gene E.; Zummo, N.

doi:10.2135/cropsci1992.0011183x003200050054x

Cited by 85 publications

(34 citation statements)

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“…To facilitate evaluation of the aflatoxin-reduction potential of the IITA-SRRC lines, observations were made in comparison to other known aflatoxin-resistant releases also tested in these trials: Mp 420 [13], Mp313E [14], Mp 715 [15], Mp717 [16], Mp 718 [17], Mp719 [17] (Mp lines developed at ARS-Mississippi State University), and T115 [9]. Five IITA-SRRC germplasm lines were screened for aflatoxin accumulation levels for the first time in the U.S. in 2010 against 18 other maize inbred lines (Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…The six released germplasm lines were derived from biparental crosses and backcross populations involving tropical elite African inbred lines (1368, 4001, and KU1414-SR) from the IITA [11] with some levels of resistance to aflatoxin production [6] and U.S. inbred lines GT-MAS:gk, MI82, and Mp420, with proven resistance to aflatoxin contamination [2,3,12,13] as parents. TZAR101 was derived from a cross of 1368 to GT-MAS:gk, while TZAR102 and TZAR103 were extracted from a cross of the same tropical inbred line (1368) to MI82.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of African-Bred Maize Germplasm Lines for Resistance to Aflatoxin Accumulation

et al. 2016

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Abstract:Aflatoxins, produced by the fungus Aspergillus flavus, contaminate maize grain and threaten human food and feed safety. Plant resistance is considered the best strategy for reducing aflatoxin accumulation. Six maize germplasm lines, TZAR101-TZAR106, were released by the International Institute of Tropical Agriculture-Southern Regional Research Center (IITA-SRRC) maize breeding collaboration for use in African National Programs and U.S. maize breeding programs. The present investigation was conducted to evaluate aflatoxin reduction by these lines in a U.S. environment. Results demonstrate significant aflatoxin reduction by IITA-SRRC lines in a U.S. aflatoxin-conducive environment (at Mississippi State University). Further testing in different locations and environments is needed to further evaluate the potential usefulness of these germplasm lines.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of African-Bred Maize Germplasm Lines for Resistance to Aflatoxin Accumulation

et al. 2016

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“…The first line released from this program for resistance to A.flavus infection and aflatoxin accumulation was Mp313E [13]. Five additional lines were released subsequently: Mp420, Mp715, Mp717, Mp718, and Mp719 [14][15][16][17]. In addition, other potential useful sources of resistance have been identified [12,18].…”

Section: Introductionmentioning

confidence: 99%

Aflatoxin Accumulation in a Maize Diallel Cross

Williams

Windham

2015

Agriculture

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Aflatoxins, produced by the fungus Aspergillus flavus, occur naturally in maize. Contamination of maize grain with aflatoxin is a major food and feed safety problem and greatly reduces the value of the grain. Plant resistance is generally considered a highly desirable approach to reduction or elimination of aflatoxin in maize grain. In this investigation, a diallel cross was produced by crossing 10 inbred lines with varying degrees of resistance to aflatoxin accumulation in all possible combinations. Three lines that previously developed and released as sources of resistance to aflatoxin accumulation were included as parents. The 10 parental inbred lines and the 45 single crosses making up the diallel cross were evaluated for aflatoxin accumulation in field tests conducted in 2013 and 2014. Plants were inoculated with an A. flavus spore suspension seven days after silk emergence. Ears were harvested approximately 60 days later and concentration of aflatoxin in the grain determined. Parental inbred lines Mp717, Mp313E, and Mp719 exhibited low levels (3-12 ng/g) of aflatoxin accumulation. In the diallel analysis, both general and specific combining ability were significant sources of variation in the inheritance of resistance to aflatoxin accumulation. General combining ability effects for reduced aflatoxin accumulation were greatest for Mp494, Mp719, and Mp717. These lines should be especially useful in breeding for resistance to aflatoxin accumulation. Breeding strategies, such as reciprocal recurrent selection, would be appropriate.

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“…One strategy to eliminate A. flavus infection and aflatoxin contamination is through host plant resistance. Although maize genotypes resistant to aflatoxin accumulation have been identified 4–10, the introgression of resistance from these lines into elite commercial cultivars has not been successful due to the deficit of selectable markers. In addition, resistance seems to be a multigenic, quantitatively inherited trait, which further complicates breeding efforts 11, 12.…”

Section: Introductionmentioning

confidence: 99%

Proteomic analysis of the maize rachis: Potential roles of constitutive and induced proteins in resistance to Aspergillus flavus infection and aflatoxin accumulation

et al. 2010

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Infection of the maize (Zea mays L.) with aflatoxigenic fungus Aspergillus flavus and consequent contamination with carcinogenic aflatoxin is a persistent and serious agricultural problem causing disease and significant crop losses worldwide. The rachis (cob) is an important structure of maize ear that delivers essential nutrients to the developing kernels and A. flavus spreads through the rachis to infect kernels within the ear. Therefore, rachis plays an important role in fungal proliferation and subsequent kernel contamination. We used proteomic approaches and investigated the rachis tissue from aflatoxin accumulation resistant (Mp313E and Mp420) and susceptible (B73 and SC212m) maize inbred lines. First, we compared rachis proteins from resistant and susceptible inbred lines, which revealed that the young resistant rachis contains higher levels of abiotic stress-related proteins and proteins from phenylpropanoid metabolism, whereas susceptible young rachis contains pathogenesis-related proteins, which are generally inducible upon biotic stress. Second, we identified A. flavus-responsive proteins in rachis of both resistant and susceptible genotypes after 10- and 35-day infection. Differential expression of many stress/defense proteins during rachis juvenility, maturation and after A. flavus challenge demonstrates that resistant rachis relies on constitutive defenses, while susceptible rachis is more dependent on inducible defenses.

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Registration of Mp420 Germplasm Line of Maize

Cited by 85 publications

References 0 publications

Evaluation of African-Bred Maize Germplasm Lines for Resistance to Aflatoxin Accumulation

Evaluation of African-Bred Maize Germplasm Lines for Resistance to Aflatoxin Accumulation

Aflatoxin Accumulation in a Maize Diallel Cross

Proteomic analysis of the maize rachis: Potential roles of constitutive and induced proteins in resistance to Aspergillus flavus infection and aflatoxin accumulation

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