Breeding for Resistance to Maize Foliar Pathogens

Pratt, Richard C.; Gordon, Stuart G.

doi:10.1002/9780470650349.ch3

Cited by 26 publications

(24 citation statements)

References 158 publications

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“…Infections manifest as local lesions and necrosis, which lead to reduced photosynthetically active leaf area and yield losses. The disease occurs prevalently under conditions of high humidity and moderate temperatures and can be found in most regions where maize is grown (13)(14)(15). The Htn1 locus confers quantitative and partial resistance against NCLB by delaying lesion formation.…”

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confidence: 99%

The maize disease resistance gene Htn1 against northern corn leaf blight encodes a wall-associated receptor-like kinase

Hurni

Scheuermann

Krattinger

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

266

221

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Northern corn leaf blight (NCLB) caused by the hemibiotrophic fungus Exserohilum turcicum is an important foliar disease of maize that is mainly controlled by growing resistant maize cultivars. The Htn1 locus confers quantitative and partial NCLB resistance by delaying the onset of lesion formation. Htn1 represents an important source of genetic resistance that was originally introduced from a Mexican landrace into modern maize breeding lines in the 1970s. Using a high-resolution map-based cloning approach, we delimited Htn1 to a 131.7-kb physical interval on chromosome 8 that contained three candidate genes encoding two wall-associated receptor-like kinases (ZmWAK-RLK1 and ZmWAK-RLK2) and one wall-associated receptor-like protein (ZmWAK-RLP1). TILLING (targeting induced local lesions in genomes) mutants in ZmWAK-RLK1 were more susceptible to NCLB than wild-type plants, both in greenhouse experiments and in the field. ZmWAK-RLK1 contains a nonarginine-aspartate (non-RD) kinase domain, typically found in plant innate immune receptors. Sequence comparison showed that the extracellular domain of ZmWAK-RLK1 is highly diverse between different maize genotypes. Furthermore, an alternative splice variant resulting in a truncated protein was present at higher frequency in the susceptible parents of the mapping populations compared with in the resistant parents. Hence, the quantitative Htn1 disease resistance in maize is encoded by an unusual innate immune receptor with an extracellular wall-associated kinase domain. These results further highlight the importance of this protein family in resistance to adapted pathogens.wall-associated receptor-like kinase | quantitative disease resistance | pattern recognition receptor | Exserohilum turcicum | maize

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mentioning

confidence: 99%

The maize disease resistance gene Htn1 against northern corn leaf blight encodes a wall-associated receptor-like kinase

Hurni

Scheuermann

Krattinger

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

266

221

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“…The SSR loci are associated with quantitative trait loci (QTL) conditioning resistance in maize to GLS (on chromosome 3 and 5) and anthesis-to-silking interval (ASI) (on chromosome 7). These loci affect important agronomic traits such as disease resistance and maturity rate, that in advertently influences adaptability to drought and yield of the crop (Babu-Rivandra et al, 2005;Pratt and Gordon, 2006). A comparison of usable SSR loci for background selection shows that only in the case of disease resistance were putative SSR found, in this case for GLS (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Stable expression of these phenotypic traits in backcross families shows that they can be used to estimate recovery of the recurrent parent genome. Whereas backcross breeding is essentially well suited for handling monogenic traits, it has also been used to transfer quantitative traits with moderate to high heritability (Pratt and Gordon, 2006). In maize, moderate to high heritability for turcicum leaf blight, grey leaf spot and maize streak virus disease, respectively have been reported (Asea et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…and Suggs, E.G.) maize streak gemini virus disease, grey leaf spot (Cercospora zeae maydis Tehon and Daniels), and drought (Okori et al, 1999;Pixley, 2001;Ngaboyisonga et al, 2006;Pratt and Gordon, 2006). Successful development of QPM requires introgression of o2 while selecting for suitable genetic modifier background to guarantee the development of high quality vitreous kernels.…”

Section: Introductionmentioning

confidence: 99%

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Feasibilty of zein proteins, simple sequence repeats and phenotypic traits for background selection in quality protein maize breeding

Maphosa¹,

Oballim²,

Nalukenge³

et al. 2011

African Crop Science Journal

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Widespread adoption of quality protein maize (QPM), especially among tropical farming systems has been slow mainly due to the slow process of generating varieties with acceptable kernel quality and adaptability to different agroecological contexts. A molecular based foreground selection system for opaque 2 (o2), the cause of enhanced lysine content in maize exists. Background selection systems albeit, are poorly developed in spite of the mapping of putative loci associated with kernel modification and knowledge on causes of modification. The aim of this study was to develop background selection systems for o2 introgression into locally adapted genotypes. Experiments were conducted at Makerere University Agricultural Research Institute, Kabanyolo (MUARIK), in Uganda on backcross progeny (BC1F1) and BC2F2), derived from a locally adapted line 136R and a QPM donor CML176. We tested the use of zein proteins known to influence modification as well as DNA markers and phenotypic descriptors as tools for background selection for recurrent parent genome and modifier loci in locally adapted maize genotypes. Simply inherited traits such as maize streak virus disease resistance were suitable for background selection. Other traits include plant and ear heights. The simple sequence repeats markers mapped to chromosomes 3, 5, 7, respectively and associated with quantitative trait loci (QTL) conditioning resistance in maize to grey leaf spot and anthesis to silking interval were suitable for assay of recurrent parent genome. The 27-kDa γ zein protein levels was suitable for background selection for kernel modification. It should, however, be used along with other zeins such as the 22 kDa and 19 kDa zein proteins.

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“…Nonetheless, mutants of both waxy and opaque-2 are associated with negative pleiotropic effects that compound their exploitation in maize breeding (Simla, Lertrat, & Suriharn, 2009;Vivek, Krivanek, Palacios-rojas, Twumasi-Afryie, & Diallo, 2008). The negative, pleiotropic effects include susceptibility to biotic stresses such as foliar diseases endemic in sub-Saharan Africa and elsewhere (Pratt & Gordon, 2006). Gray leaf spot (GLS) of maize, caused by Cercospora zeae-maydis Tehon & E. Y. Daniels; turcicum leaf blight (TLB), caused by Exserohilum turcicum (Pass.)…”

Section: Introductionmentioning

confidence: 99%

Reaction of Waxy and Opaque-2 Inbreds and their Derived Progenies to Multiple Foliar Diseases of Maize in Uganda

Bombom¹,

Okori²,

Gibson³

et al. 2012

JAS

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Specialty maize lines possessing important endosperm genes waxy and/or opaque-2 enhance processing and nutritional qualities of the grain. However, production and utilization of specialty maize varieties for food, feeds and various industrial end-uses are constrained by endemic foliar diseases of maize including turcicum leaf blight, gray leaf spot and maize streak virus disease. The purpose of this study was to investigate the reaction of two specialty maize genotypes (waxy and opaque-2) and their derived F 1 , F 2 and backcross progenies to multiple foliar diseases of maize. A randomized complete block design was used to evaluate these materials under field conditions in Uganda. Significant differences among populations were observed for susceptibility to turcicum leaf blight and maize streak virus disease. The opaque-2 inbred CML182 did not manifest any maize streak virus disease symptoms during the assessment period. Significant differences were observed for susceptibility to maize streak virus disease between reciprocal crosses but not for turcicum leaf blight suggesting possible maternal effects associated with maize streak virus disease resistance. Susceptibility to turcicum leaf blight and maize streak virus disease was associated with the recessive endosperm genes (waxy and opaque-2). These results show that developing waxy and opaque-2 specialty maize varieties with good agronomic and grain quality attributes is dependent on the choice of parents carrying important resistance as well as endosperm modifying genes.

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Breeding for Resistance to Maize Foliar Pathogens

Cited by 26 publications

References 158 publications

The maize disease resistance gene Htn1 against northern corn leaf blight encodes a wall-associated receptor-like kinase

The maize disease resistance gene Htn1 against northern corn leaf blight encodes a wall-associated receptor-like kinase

Feasibilty of zein proteins, simple sequence repeats and phenotypic traits for background selection in quality protein maize breeding

Reaction of Waxy and Opaque-2 Inbreds and their Derived Progenies to Multiple Foliar Diseases of Maize in Uganda

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