The Genetics of Leaf Flecking in Maize and Its Relationship to Plant Defense and Disease Resistance

Olukolu, Bode A.; Bian, Yang; Vries, Brian de; Tracy, William F.; Wisser, Randall J.; Holland, James B.; Balint‐Kurti, Peter

doi:10.1104/pp.15.01870

Cited by 24 publications

(20 citation statements)

References 109 publications

(148 reference statements)

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“…B), appearing in several widely used lines as well as in several other species such as barley (Makepeace et al , ), wheat (Nair and Tomar, ) and oats (Ferdinandsen and Winge, ). Recent work has indicated that in some cases flecking seems to be a mild form of misregulated HR (Olukolu et al , ; Vontimitta et al , ).…”

Section: Conceptsmentioning

confidence: 99%

“…These approaches generally failed since the disease resistance provided was insufficient or the yield penalties were too high (Hammond‐Kosack and Parker, ). Both mild and extreme leaf flecking (as described above) are associated with broad‐spectrum resistance (Olukolu et al , ). While more extreme flecking was also associated with a yield penalty, milder flecking was not.…”

Section: Consequencesmentioning

confidence: 99%

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The plant hypersensitive response: concepts, control and consequences

Balint‐Kurti

2019

Molecular Plant Pathology

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277

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Summary The hypersensitive defence response is found in all higher plants and is characterized by a rapid cell death at the point of pathogen ingress. It is usually associated with pathogen resistance, though, in specific situations, it may have other consequences such as pathogen susceptibility, growth retardation and, over evolutionary timescales, speciation. Due to the potentially severe costs of inappropriate activation, plants employ multiple mechanisms to suppress inappropriate activation of HR and to constrain it after activation. The ubiquity of this response among higher plants despite its costs suggests that it is an extremely effective component of the plant immune system.

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Section: Conceptsmentioning

confidence: 99%

Section: Consequencesmentioning

confidence: 99%

The plant hypersensitive response: concepts, control and consequences

Balint‐Kurti

2019

Molecular Plant Pathology

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456

277

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“…Association mapping studies have been widely reported for foliar diseases (Kump et al, 2011; Poland et al, 2011; Gowda et al, 2015; Olukolu et al, 2016), ear rot diseases (Zila et al, 2014; Warburton et al, 2015; Han et al, 2018), flowering time, and plant architecture (Wallace et al, 2016) in maize. In this study, we applied a comprehensive GWAS for popping expansion using 165,089 SNPs markers in 183 inbred lines with 2 yr of trial data.…”

mentioning

confidence: 99%

Genomic‐Wide Association Study of Popping Expansion in Tropical Popcorn and Field Corn Germplasm

Senhorinho¹,

Coan²,

Marino

et al. 2019

Crop Science

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Popcorn is a popular snack food with higher grain value compared with “field corn” maize (Zea mays L.). In general, popcorn germplasm is less improved than common maize cultivars, with less favorable agronomic performance and greater susceptibility to pests, diseases, and lodging, especially in tropical environments. One approach to expanding and improving popcorn germplasm is to introduce favorable alleles for agronomic performance from field corn. If markers tagging quantitative trait loci (QTLs) associated with popping expansion were identified, they could be selected with markers to maintain popping expansion in breeding populations derived from crosses between field and popcorn germplasm. The objectives of this study were to identify single nucleotide polymorphism (SNP) markers and putative candidate genes associated with higher popping expansion in a diverse sample of popcorn and field corns relevant to Brazilian breeding programs. We applied a comprehensive genome‐wide association study (GWAS) for popping expansion, using 165,089 SNP markers in 183 inbred lines with 2 yr of trial data. Four SNPs were significantly associated with popping expansion, three of which were colocalized to previously reported meta‐QTLs, and one that was novel. Annotated genes closely linked to the associated SNPs were identified with functions related with starch content, which plays an important role in popping expansion quality. If these associations can be validated independently, they can be useful for breeders to select agronomically superior genotypes with greater popping expansion.

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“…Olukolu et al 2013Olukolu et al , 2014Olukolu et al , 2016 and plant development(Buescher et al 2014), among…”

mentioning

confidence: 99%

AVery Oil Yellow1modifier of theOil Yellow1-N1989allele uncovers a cryptic phenotypic impact of cis-regulatory variation in maize

Khangura

Marla

Venkata

et al. 2017

Preprint

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Detecting phenotypically relevant variation outside the coding sequence of genes and distinguishing it from the neutral variants is not trivial partly because the mechanisms by which a subset of the DNA polymorphisms in these regions affect gene regulation are poorly understood. Here we present an approach of using dominant genetic markers with convenient phenotypes to investigate the effect of cis and trans-acting regulatory variations. In the current study, we performed a forward genetic screen for natural variants that suppress or enhance the semi-dominant mutant allele Oy1-N1989 encoding the magnesium chelatase subunit I of maize. This mutant permits rapid phenotyping of leaf color as a reporter of chlorophyll accumulation, enabling QTL mapping and GWAS approaches to identify natural variation in maize affecting chlorophyll metabolism. Using different mapping approaches, we identified the same modifier locus, very oil yellow 1 (vey1), that was linked to the reporter gene itself. Based on the analysis of OY1 transcript abundance and study of a maize gene expression dataset, vey1 is predicted to be a cis-acting regulatory sequence polymorphism that causes the differential accumulation of OY1 transcripts encoded by the mutant and wildtype alleles. Fine mapping of the vey1 genomic region using multiple independent mapping populations demonstrated the value of multiple cycles of early generation random mating to increase recombination. The vey1 allele appears to be a common polymorphism in the maize germplasm that alters the expression level of a key gene in chlorophyll biosynthesis.

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The Genetics of Leaf Flecking in Maize and Its Relationship to Plant Defense and Disease Resistance

Cited by 24 publications

References 109 publications

The plant hypersensitive response: concepts, control and consequences

The plant hypersensitive response: concepts, control and consequences

Genomic‐Wide Association Study of Popping Expansion in Tropical Popcorn and Field Corn Germplasm

AVery Oil Yellow1modifier of theOil Yellow1-N1989allele uncovers a cryptic phenotypic impact of cis-regulatory variation in maize

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