CO441 corn inbred line

Reid, L. M.; McDiarmid, G.; Parker, A. J.; Woldemariam, T.

doi:10.4141/p02-058

Cited by 26 publications

(19 citation statements)

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“…The most recent gibberella ear rot resistant inbred released, CO441, exhibited high resistance to both diseases. This inbred also has excellent combining ability for grain yield (Reid et al 2003).…”

Section: Resultsmentioning

confidence: 99%

Increased resistance to Ustilago zeae and Fusarium verticilliodes in maize inbred lines bred for Fusarium graminearum resistance

et al. 2008

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Preliminary field observations in our maize breeding nurseries indicated that breeding for improved resistance to gibberella ear rot (Fusarium graminearum) in maize may indirectly select for resistance to another ear disease, common smut (Ustilago zeae). To investigate this, we compared the disease severity ratings obtained on 189 maize inbreds, eight of which included our inbreds developed with selection for gibberella ear rot resistance after field inoculation and breeding for 8-10 years. No correlation was found between disease severities for the 189 inbreds but the eight gibberella-resistant lines were consistently more resistant to smut. To further examine this relationship and to determine if these eight inbreds would be useful for developing inbreds with either common smut or fusarium ear rot (F. verticilliodes) resistance, we conducted a Griffing's diallel analysis on six inbreds of maize, four with high levels of gibberella ear rot resistance representing all of the pedigree groups in our eight gibberella lines, and two with very low levels. Our most gibberella ear rot resistant inbreds, CO433 and CO441, had the lowest disease ratings for all three diseases, the consistently largest general combining ability effects and several significant specific combining ability effects. It was concluded that some inbreds bred specifically for gibberella ear rot would also be useful in breeding for resistance to common smut and fusarium ear rot.

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Section: Resultsmentioning

confidence: 99%

Increased resistance to Ustilago zeae and Fusarium verticilliodes in maize inbred lines bred for Fusarium graminearum resistance

et al. 2008

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“…B73 is a GER susceptible inbred which also served as the reference genome for maize [ 15 ] and for which seed stock has been maintained at the Ottawa Research and Development Centre (ORDC), Agriculture and Agri-Food Canada for decades. CO441 is an inbred developed at the ORDC with good silk and kernel GER resistance [ 16 ].…”

Section: Methodsmentioning

confidence: 99%

Transcriptome profiling of two maize inbreds with distinct responses to Gibberella ear rot disease to identify candidate resistance genes

et al. 2018

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BackgroundGibberella ear rot (GER) is one of the most economically important fungal diseases of maize in the temperate zone due to moldy grain contaminated with health threatening mycotoxins. To develop resistant genotypes and control the disease, understanding the host-pathogen interaction is essential.ResultsRNA-Seq-derived transcriptome profiles of fungal- and mock-inoculated developing kernel tissues of two maize inbred lines were used to identify differentially expressed transcripts and propose candidate genes mapping within GER resistance quantitative trait loci (QTL). A total of 1255 transcripts were significantly (P ≤ 0.05) up regulated due to fungal infection in both susceptible and resistant inbreds. A greater number of transcripts were up regulated in the former (1174) than the latter (497) and increased as the infection progressed from 1 to 2 days after inoculation. Focusing on differentially expressed genes located within QTL regions for GER resistance, we identified 81 genes involved in membrane transport, hormone regulation, cell wall modification, cell detoxification, and biosynthesis of pathogenesis related proteins and phytoalexins as candidate genes contributing to resistance. Applying droplet digital PCR, we validated the expression profiles of a subset of these candidate genes from QTL regions contributed by the resistant inbred on chromosomes 1, 2 and 9.ConclusionBy screening global gene expression profiles for differentially expressed genes mapping within resistance QTL regions, we have identified candidate genes for gibberella ear rot resistance on several maize chromosomes which could potentially lead to a better understanding of Fusarium resistance mechanisms.Electronic supplementary materialThe online version of this article (10.1186/s12864-018-4513-4) contains supplementary material, which is available to authorized users.

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“…CO441 is a short-season corn inbred line derived from Jacques 7700 x CO298 with improved resistance to silk infection by Fusarium graminearum. Resistance to infection via wounded kernels is also high (Reid et al, 2003).…”

Section: Plant Materialsmentioning

confidence: 99%

Differential gene expression in kernels and silks of maize lines with contrasting levels of ear rot resistance after Fusarium verticillioides infection

Lanubile

Pasini

Marocco

2010

Journal of Plant Physiology

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CO441 corn inbred line

Cited by 26 publications

References 0 publications

Increased resistance to Ustilago zeae and Fusarium verticilliodes in maize inbred lines bred for Fusarium graminearum resistance

Increased resistance to Ustilago zeae and Fusarium verticilliodes in maize inbred lines bred for Fusarium graminearum resistance

Transcriptome profiling of two maize inbreds with distinct responses to Gibberella ear rot disease to identify candidate resistance genes

Differential gene expression in kernels and silks of maize lines with contrasting levels of ear rot resistance after Fusarium verticillioides infection

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