The resistance of maize inbred lines to sugarcane mosaic virus in Australia

1981 ◽  
Vol 32 (5) ◽  
pp. 741 ◽  
Author(s):  
DM Persley ◽  
IF Martin ◽  
RS Greber
Keyword(s):  
Mosaic Virus ◽  
Natural Infection ◽  
Dominant Gene ◽  
Inbred Lines ◽  
Sugarcane Mosaic Virus ◽  
Maize Dwarf Mosaic Virus ◽  
Couch Grass ◽  
Sources Of Resistance ◽  
Maize Inbred Lines ◽  
Johnson Grass

Maize inbred lines, derived from both Australian and exotic sources, and used in a breeding programme at Kairi, Qld, were screened for resistance to a Johnson grass strain of sugarcane mosaic virus (SCMV-Jg). There was a good correlation between ratings made following manual inoculation in a glasshouse and those following exposure to natural field infection. Seven lines were highly resistant in both glasshouse and field ratings. A further nine lines showed an intermediate level of resistance following manual inoculation and developed from 0 to 7 % infection under field conditions when a susceptible line developed 99 % infection. Data obtained following the manual inoculation of plants in segregating generations of crosses between resistant KL 57 and susceptible KL 9 were consistent with resistance being controlled by a single dominant gene. Six lines (Pa 405, CI 44, Tx 601, Oh 07, Oh 7B, 38-11) that were used as sources of resistance to maize dwarf mosaic virus, strain A (MDMV-A) in the U.S.A. developed natural infection levels of less than 15% with SCMV-Jg. Only Pa 405 was highly resistant to manual inoculation. Four of 11 SCMV-Jg resistant lines were also highly resistant to manual inoculations with the sugarcane, Sabi grass and Queensland blue couch grass strains.

Analysis of sugarcane mosaic virus resistance in maize in an isogenic dihybrid crossing scheme and implications for breeding potyvirus-resistant maize hybrids

Genome ◽  
2006 ◽  
Vol 49 (10) ◽  
pp. 1274-1282 ◽  
Author(s):  
Yongzhong Xing ◽  
Christina Ingvardsen ◽  
Raphael Salomon ◽  
Thomas Lübberstedt
Keyword(s):  
Mosaic Virus ◽  
Gene Action ◽  
Dominant Gene ◽  
Sugarcane Mosaic Virus ◽  
Maize Dwarf Mosaic Virus ◽  
Maize Hybrids ◽  
Complete Resistance ◽  
Additive Gene ◽  
High Level ◽  
Simple Sequence

The gene action of 2 sugarcane mosaic virus (SCMV) resistance loci in maize, Scmv1 and Scmv2, was evaluated for potyvirus resistance in an isogenic background. All 4 homozygous and 5 heterozygous isogenic genotypes were produced for introgressions of the resistant donor (FAP1360A) alleles at both loci into the susceptible parent (F7) genetic background using simple sequence repeat markers. For SCMV and maize dwarf mosaic virus (MDMV), virus symptoms appeared rapidly in the 3 homozygous genotypes, with susceptibility alleles fixed at 1 or both loci. Although the 9 isogenic genotypes revealed a high level of resistance to Zea mosaic virus (ZeMV), the same 3 homozygous genotypes were only partially resistant. This indicates that 1 resistance gene alone is not sufficient for complete resistance against SCMV, MDMV, and ZeMV. Scmv1 showed strong early and complete dominant gene action to SCMV, but it gradually became partially dominant. Scmv2 was not detected at the beginning, showing dominant gene action initially and additive gene action at later stages. Both genes interacted epistatically (for a high level of resistance, at least 1 resistance allele at each of both loci is required). This implies that double heterozygotes at the 2 loci are promising for producing SCMVresistant hybrids. Results are discussed with respect to prospects for isolation of SCMV and MDMV resistance genes.

scholarly journals Peroxidase Activity in Maize Inbred Lines Resistant or Susceptible to Maize Dwarf Mosaic Virus

2003 ◽  
Vol 2 (1) ◽  
pp. 1-8 ◽  
Author(s):  
I.R.P. Souza ◽  
E. Oliveira ◽  
M.A. Peres ◽  
A.C. Oliveira ◽  
A.Á.C. Purcino
Keyword(s):  
Mosaic Virus ◽  
Peroxidase Activity ◽  
Inbred Lines ◽  
Maize Dwarf Mosaic Virus ◽  
Maize Inbred Lines

Inheritance of the necrotic and mosaic reactions in sorghum infected with a 'Johnson grass' strain of sugarcane mosaic virus

1970 ◽  
Vol 21 (4) ◽  
pp. 549 ◽  
Author(s):  
DS Teakle ◽  
RF Moore ◽  
DL George ◽  
DE Byth
Keyword(s):  
Mosaic Virus ◽  
Single Gene ◽  
Inbred Lines ◽  
Sugarcane Mosaic Virus ◽  
Dominant Allele ◽  
Systemic Necrosis ◽  
Johnson Grass ◽  
Plant Colour

When 30 sorghum inbred lines were inoculated with a 'Johnson grass' strain of sugarcane mosaic virus, seven reacted with systemic necrosis whereas 23 developed systemic mosaic symptoms. Nine F1 populations, 11 F2 populations, and 17 F3 populations derived from one F2 were tested for reaction to the virus. The results are consistent with the hypothesis that inheritance of the type of reaction is controlled by a single gene. The gene does not appear to have been reported previously, and the alleles are designated N, n. Presence of the dominant allele results in systemic necrosis, whereas presence of the homozygous recessive results in systemic mosaic symptoms. Colour of the necrosis, i.e. whether red or tan, is controlled by another single gene, probably the factor for purple (P) or tan (p) plant colour. The N and P genes do not appear to be linked.

scholarly journals Variabilidade genética de Sugarcane mosaic virus, causando mosaico em milho no Brasil

2011 ◽  
Vol 46 (4) ◽  
pp. 362-369 ◽  
Author(s):  
Marcos Cesar Gonçalves ◽  
Diogo Manzano Galdeano ◽  
Ivan de Godoy Maia ◽  
César Martins Chagas
Keyword(s):  
Mosaic Virus ◽  
Sao Paulo ◽  
Sugarcane Mosaic Virus ◽  
Maize Dwarf Mosaic Virus ◽  
São Paulo ◽  
Rt Pcr ◽  
Das Elisa

O objetivo deste trabalho foi caracterizar biológica e molecularmente três isolados de Sugarcane mosaic virus (SCMV) de lavouras de milho, analisá-los filogeneticamente e discriminar polimorfismos do genoma. Plantas com sintomas de mosaico e nanismo foram coletadas em lavouras de milho, no Estado de São Paulo e no Município de Rio Verde, GO, e seus extratos foliares foram inoculados em plantas indicadoras e submetidos à análise sorológica com antissoros contra o SCMV, contra o Maize dwarf mosaic virus (MDMV) e contra o Johnsongrass mosaic virus (JGMV). Mudas de sorgo 'Rio' e 'TX 2786' apresentaram sintomas de mosaico após a inoculação dos três isolados, e o DAS-ELISA confirmou a infecção pelo SCMV. O RNA total foi extraído e usado para amplificação por transcriptase reversa seguida de reação em cadeia de polimerase (RT-PCR). Fragmentos específicos foram amplificados, submetidos à análise por polimorfismo de comprimento de fragmento de restrição (RFLP) e sequenciados. Foi possível discriminar os genótipos de SCMV isolados de milho de outros isolados brasileiros do vírus. Alinhamentos múltiplos e análises dos perfis filogenéticos corroboram esses dados e mostram diversidade nas sequências de nucleotídeos que codificam para a proteína capsidial, o que explica o agrupamento separado desses isolados e sugere sua classificação como estirpes distintas, em lugar de simples isolados geográficos.

Resistance of some Australian inbred maize lines to maize dwarf mosaic disease

1969 ◽  
Vol 9 (40) ◽  
pp. 541 ◽  
Author(s):  
PW Grogan ◽  
DS Teakle
Keyword(s):  
New South ◽  
Natural Infection ◽  
New South Wales ◽  
Inbred Lines ◽  
Mosaic Disease ◽  
The Other ◽  
Maize Inbred Lines ◽  
South Wales ◽  
Resistant Lines

Seven out of eight maize inbred lines developed at Lawes in Queensland from open-pollinated varieties were resistant to maize dwarf mosaic disease when exposed to natural infection in the field. Five of the seven resistant inbred lines failed to become systemically infected when inoculated with infectious sap in the glasshouse. By contrast, only three out of twenty lines introduced from the U.S.A., and two out of eight lines developed at the Grafton and Glen Innes Breeding Stations in New South Wales, were resistant in the field. All three resistant lines from the U.S.A. were systemically infected when inoculated in the glasshouse, but the two resistant lines from Grafton in New South Wales were not. The resistant Lawes and Grafton maize inbred lines would appear to be better sources of genes conferring resistance to maize dwarf mosaic disease than the other lines tested.

scholarly journals Sugarcane Mosaic: Virus Particles and Relative Resistance of Sugarcane Varieties in Puerto Rico.

1969 ◽  
Vol 63 (3) ◽  
pp. 315-324
Author(s):  
Lii-Jang Liu
Keyword(s):  
Puerto Rico ◽  
Electron Microscope ◽  
Mosaic Virus ◽  
Natural Infection ◽  
Sugarcane Mosaic Virus ◽  
Relative Resistance ◽  
Virus Particles ◽  
Sugarcane Varieties ◽  
Greenhouse Experiments ◽  
Virus Strains

Rod-shaped virus particles were observed under the electron microscope in negatively stained juice obtained from sugarcane mosaic-affected plants of CP31-294. The particles were of strains A and B and measured 720-1,446 nm x 14-15 nm and 720-1,730 nm x 14-15 nm, respectively. A total of 51 promising varieties of sugarcane were artificially inoculated with a mixture of mosaic virus strains A, B and D in three separate greenhouse experiments during the last 3 years. PR 1141, PR 1152, PR 62-285, PR 64-1548, PR 65- 153, PR 65-2538, Q 68 and selection Sóller were found potentially capable of taking mosaic, with an average of 10-19% infection. However, none of these varieties showed mosaic symptoms in the fields under natural infection. Therefore, they are acceptable for field planting in Puerto Rico.

scholarly journals New Sources of Resistance in Sorghum (Sorghum bicolor) Germplasm Are Effective Against a Diverse Array of Potyvirus spp.

Plant Disease ◽  
2012 ◽  
Vol 96 (12) ◽  
pp. 1775-1779 ◽  
Author(s):  
Dallas L. Seifers ◽  
Ramasamy Perumal ◽  
Christopher R. Little
Keyword(s):  
Mosaic Virus ◽  
Maize Dwarf Mosaic Virus ◽  
Mechanical Inoculation ◽  
Initial Screening ◽  
Accession Number ◽  
Sources Of Resistance ◽  
Mini Core Collection ◽  
Wide Range ◽  
Similar Temperature ◽  
Sorghum Accession

Sorghum is a host to numerous Potyvirus spp. and its germplasm encompasses a wide range of infection responses to these viruses. We determined how 183 mini-core-collection sorghum germplasm accessions responded to mechanical inoculation with Maize dwarf mosaic virus (MDMV) in growth regimes in which they were maintained at 30°C followed by 16°C for 5 days. Accessions that appeared immune to MDMV in this initial screening were evaluated for their response in a similar temperature maintenance regime to mechanical inoculation with MDMV, Sugarcane mosaic virus strain MDB (SCMV-MDB), Sorghum mosaic virus (SrMV), Zea mosaic virus (ZeMV), and Kansas, Nigerian, and Australian isolates of Johnsongrass mosaic virus (JGMV-KS, -N, and -Aus, respectively). In both experiments, MDMV systemically infected all accessions except international sorghum accession number (IS) 7679 and IS 20740. These accessions also proved resistant to MDMV, SCMV-MDB, SrMV, and JGMV-N but both were susceptible to the JGMV-KS and JGMV-Aus isolates. IS 7679 but not IS 20740 was resistant to infection with ZeMV. These observations suggest that IS 7679 and IS 20740 might serve as new sources of resistance to several Potyvirus spp. that systemically infect sorghum.

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