Evaluation of Maize Germ Plasm for Resistance to Maize Rayado Fino Virus

Bustamante, Pedro I.; Hammond, Rosemarie W.; Ramírez, Pedro José Rueda

doi:10.1094/pdis.1998.82.1.50

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…The residual plots of the variance indicated a linear relationship between the observed and predicted residuals, and no clear pattern for the plots involving standardized residuals. Thus, the controls behaved as predicted from previous disease resistance tests (3,37,39). Thus, hotnogeneity of variance and normal distribution were assumed.…”

Section: Responses Of Maize Accessions To Inoculation With Mrfvsupporting

confidence: 80%

Identification of Resistance to Maize rayado fino virus in Maize Inbred Lines

Mendoza

Francis²,

Redinbaugh

2013

Plant Disease

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Zambrano, J. L., Francis, D. M., and Redinbaugh, M. G. 2013. Identification of resistance to Maize rayado fino virus in maize inbred lines. Plant Dis. 97:1418-1423.Malze rayado fino virus (MRFV) causes one of the most important virus diseases of maize in America. Severe yield losses, ranging from 10 to 50% in landraces to nearly 100% in contemporary cultivars, have been reported. Resistance has been reported in maize populations, but few resistant inbred lines have been identified. Maize inbred lines representing the range of diversity in the cultivated types and selected lines known to be resistant to other viruses were evaluated to identify novel sources of resistance to MRFV. The virus was transmitted to maize seedlings using the vector Dalbulus maidis. and disease incidence and severity were evaluated beginning 7 days postinoculation.Most of the 36 lines tested were susceptible to MRFV, with mean dis-ease incidence ranging from 21 to 96%, and severity from 1.0 to 4.3 (using a 0 to 5 severity scale). A few genotypes, including CML333 and Kill, showed intermediate levels of resistance, with 14 and 10% incidence, respectively. Novel sources of resistance, with incidence of less than 5% and severity ratings of 0.4 or less, included the inbred lines OhlVI, CML287, and Cuba. In OhlVI, resistance appeared to be dominant, and segregation of resistance in FT plants was consistent with one or two resistance genes. The discovery of novel sources of resistance in maize inbred lines will facilitate the identification of virus resistance genes and their incorporation into breeding programs.

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Section: Responses Of Maize Accessions To Inoculation With Mrfvsupporting

confidence: 80%

Identification of Resistance to Maize rayado fino virus in Maize Inbred Lines

Mendoza

Francis²,

Redinbaugh

2013

Plant Disease

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“…Symptoms are most noticeable at the base of leaves, with an increase in severity in the younger leaves (Gamez, 1980;Nault et al, 1980). Symptom severity is not always proportional to viral replication within the host and may be influenced by environmental conditions or germ plasm (Bustamente et al, 1998). In addition, the symptoms of MRFV infection could be masked by the symptoms produced by coinfection with corn stunt agents.…”

Section: Resultsmentioning

confidence: 99%

“…Further examination of the occurrence of MRFV in Brazil and its association with corn stunt disease may answer these questions. The use of existing resistance or tolerance germ plasm (Bustamente et al, 1998) or the development of resistant germ plasm through biotechnology will benefit control measures and reduce losses to the diseases caused by MRFV.…”

Section: Resultsmentioning

confidence: 99%

Molecular confirmation of Maize rayado fino virus as the Brazilian corn streak virus

Hammond

Bedendo²

2005

Sci. agric. (Piracicaba, Braz.)

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Maize rayado fino virus (MRFV), present in various countries in Latin America, has shown similarities to corn streak virus that occurs in Brazil, regarding pathogenic, serological and histological characteristics. In the current report both virus were molecularly compared to confirm the similarities between them. MRFV was identified by nucleic acid hybridization in samples of maize tissues exhibiting symptoms of "corn stunt" disease, collected from two Brazilian States -São Paulo and Minas Gerais. The coat protein gene and 3'non-translated region of MRFV were amplified from infected tissues by reverse transcriptionpolymerase chain reaction (RT-PCR) using MRFV-specific primers, and were characterized by nucleotide sequence and phylogenetic analysis of the cloned PCR products.

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“…Maize rayado fino symptoms include small chlorotic spots on young leaves that become elongated and more numerous along leaf veins as the plants age. Infected plants are stunted and grain yield is reduced (Bustamante, Hammond, & Ramirez, 1998;Toler, Skinner, Bockholt, & Harris, 1985;Vasquez & Mora, 2007). Maize rayado fino and achaparramiento are problems where overlapping maize crops provide a reservoir of pathogens and continuous food and breeding hosts for D. maidis.…”

Section: Maize Rayado Fino (Maize Fine Stripe)mentioning

confidence: 99%

“…MRFV-resistant lines and QTL for MRFV resistance have been identified (Bustamante et al, 1998;Vandeplas, 2003;Zambrano, Francis, & Redinbaugh, 2013;, resistant hybrids and cultivars are not yet available.…”

Section: Maize Rayado Fino (Maize Fine Stripe)mentioning

confidence: 99%