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.

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.

Inheritance of the resistance of Krish sorghum to sugarcane mosaic virus

1976 ◽  
Vol 27 (1) ◽  
pp. 45 ◽  
Author(s):  
BD Conde ◽  
RF Moore ◽  
DS Fletcher ◽  
DS Teakle
Keyword(s):  
Mosaic Virus ◽  
Single Gene ◽  
Sugarcane Mosaic Virus ◽  
Sorghum Halepense ◽  
N Gene ◽  
Breeding Lines ◽  
Johnson Grass ◽  
Sorghum Breeding ◽  
Relationship Of ◽  
The Relationship

When two plants of Krish sorghum resistant to sugarcane mosaic virus were selfed or used in crosses with susceptible inbred lines, the segregation patterns of the S1, F1, bc1F1, F2 and F3 populations indicated that resistance is controlled by a single gene, with resistance dominant. One of the parents of Krish, i.e. Q12117 introduced from Coimbatore, India, as 'Sorghum halepense 2n = 20', is probably the source of the gene for resistance; tests of Q12117 revealed that three out of 34 seedlings were resistant after being inoculated with the virus four times. The relationship of the Krish gene with the N gene, which controls the mosaic and necrotic reactions in sorghums infected with the Australian Johnson grass strain of sugarcane mosaic virus, has not been definitely established, but it could be either closely linked or an additional allele at the N locus. The Krish gene for resistance has been transferred by means of a backcrossing program into several commercial sorghum breeding lines without losing its effectiveness against Australian and some overseas strains of sugarcane mosaic virus.

The effect of sugarcane mosaic virus on the yield of eleven grain sorghum (Sorghum bicolor) cultivars

1979 ◽  
Vol 19 (97) ◽  
pp. 225 ◽  
Author(s):  
RG Henzell ◽  
DM Persley ◽  
DS Fletcher ◽  
RS Greber ◽  
LVan Slobbe
Keyword(s):  
Sorghum Bicolor ◽  
Mosaic Virus ◽  
Yield Components ◽  
Grain Sorghum ◽  
Grain Weight ◽  
Sugarcane Mosaic Virus ◽  
Yield Losses ◽  
Johnson Grass ◽  
Yield Depression ◽  
Leaf Symptoms

The effect of a Johnson grass strain of sugarcane mosaic virus (SCMV-Jg) on 11 grain sorghum cultivars was assessed in three experiments in which young plants were inoculated with the virus. The 11 cultivars were Alpha, Dekalb B17, Dekalb C42t, Dekalb C42Y, Dekalb E57, Goldrush, Pride, 051 61, Q5161 VR, Tx6I0SR and Yates 233. Severe yield depression (>50%) was observed in those cultivars that developed the red stripe and red leaf symptoms. The effect on cultivars producing mosaic symptoms ranged from tolerance (Tx610SR) to yield losses of ca 25%. Yield depression was primarily due to fewer grains per panicle and reduced grain weight. The number of panicles per ha was the least affected of the yield components. In most instances, the disease delayed maturity and decreased height. A virus-resistant cultivar (Q5161 VR) showed an increase in yield when inoculated with SCMV-Jg.

The inheritance of the red leaf reaction of grain sorghum to sugarcane mosaic virus infection

1977 ◽  
Vol 28 (5) ◽  
pp. 853 ◽  
Author(s):  
DM Persley ◽  
the late RF Moore ◽  
DS Fletcher
Keyword(s):  
Virus Infection ◽  
Mosaic Virus ◽  
Low Temperatures ◽  
Grain Sorghum ◽  
N Gene ◽  
Dominant Allele ◽  
Bc1f1 Population ◽  
Johnson Grass ◽  
Temperature Regimes ◽  
Mosaic Virus Infection

The hypothesis that the necrotic red leaf and red stripe reactions of grain sorghum to sugar-cane mosaic virus – Johnson grass strain infection are independently inherited was tested. Five F1 and 15 F2 populations and one bc1F1 population were grown under both high (26.6–23.8°C) and low (15.5°) temperature regimes following manual inoculation with the virus. The results were consistent with the hypothesis that the presence of a homozygous recessive allele, termed rlf, conditions the expression of the necrotic red leaf reaction following exposure of plants to low temperatures. Plants express only mosaic symptoms in the presence of the dominant allele RLF and the absence of the N gene. The previously reported N gene and the rlf gene were shown to be independently inherited.

scholarly journals Apparent Effect of the n Gene of Sorghum on Incidence of Infection by a "Johnson Grass" Strain of Sugar-Cane Mosaic Virus

1972 ◽  
Vol 25 (4) ◽  
pp. 873
Author(s):  
DS Teakle ◽  
RF Moore
Keyword(s):  
Mosaic Virus ◽  
Sugar Cane ◽  
New South ◽  
Dominant Gene ◽  
Systemic Reaction ◽  
N Gene ◽  
Apparent Effect ◽  
Systemic Necrosis ◽  
South Wales ◽  
Johnson Grass

A "Jolmson grass" strain of sugar-cane mosaic virus commonly infects crops of sorghum in New South Wales and Queensland. Infected sorghum plants show one of two types of systemic reaction, either a systemic necrosis or a systemic mosaic. Type of reaction is controlled by a single dominant gene, the N gene. The N-genotypes condition the necrotic reaction, while nn conditions the mosaic reaction (Teakle et al. 1970).

scholarly journals Response of Selected Maize Inbred Germplasm to Maize Lethal Necrosis Disease and Its Causative Viruses (Sugarcane Mosaic Virus and Maize Chlorotic Mottle Virus) in Kenya

2018 ◽  
Vol 12 (1) ◽  
pp. 215-226 ◽  
Author(s):  
James Karanja ◽  
John Derera ◽  
Augustine Gubba ◽  
Stephen Mugo ◽  
Ann Wangai
Keyword(s):  
Food Security ◽  
Mosaic Virus ◽  
Smallholder Farmers ◽  
Inbred Lines ◽  
Sugarcane Mosaic Virus ◽  
Mottle Virus ◽  
Maize Productivity ◽  
Chlorotic Mottle Virus ◽  
Maize Chlorotic Mottle Virus ◽  
Chlorotic Mottle

Background: Maize lethal necrosis (MLN) disease continues to reduce the productivity of maize drastically threatening food security in the affected regions. It continues to cause yield loss of 30–100 percent in farmers’ fields, depending on the time of infestation which is valued at $198 million in Kenya. This has not only threatened regional trade, but also seed industry. It has been reported in the major maize belts of Uasin Gishu, Trans-Nzoia, Bomet, Narok and Nandi Counties. MLN is caused by the synergistic interaction between Sugarcane Mosaic Virus (SCMV) and Maize Chlorotic Mottle Virus (MCMV). The disease has then spread to other Eastern and Central African countries with devastating food security and economic consequences. Objectives: This study highlights result after screening selected maize inbred lines for resistance to MLN, SCMV and MCMV in identifying promising lines for integration into the breeding program for MLN resistance. Methods: Sixty-five (65) maize genotypes were artificially inoculated using virus strains collected from Bomet County in Kenya at 3-4 leaf stage. Data on disease severity and incidence, AUDPC and flowering were recorded. Results: From the result, the inbred lines had significant differences for SCMV, MCMV and MLN reactions. Based on Area Under Disease Progress Curve (AUDPC) score and ELISA analysis, genotypes MLN001 and MLN006 have the lowest score of 270, whereas OH28 had a maximum at 1259 under MCMV. Genotypes MLN042 and MLN041 were identified as the most promising sources of resistant against SCMV. However, no genotype was identified to have acceptable levels of tolerance to MLN, but MLN001 and MLN013 were identified as the best performers under MLN. This study also validated the presence of MLN tolerance in MLN013 (CKDHL120312) and MLN001 (CKDHL120918) as earlier reported by CIMMYT. These tolerant genotypes are now serving as donors in the introgression of the tolerance into the Kenyan adapted maize backgrounds and development of improved MLN tolerant varieties. This will go a long way in restoring and ensuring sustainable maize productivity in improving the livelihoods of the smallholder farmers who form 75% of the major maize producers in Kenya. Conclusion: The identified inbred lines would be recommended for use in varietal development, MLN management and to enhance maize productivity, in the MLN endemic regions and further research in understanding the mode of gene action for MLN tolerance.

Distribution of a Johnson grass strain of sugarcane mosaic virus in New South Wales and studies of the host range of the Johnson grass and sugarcane strains

1974 ◽  
Vol 25 (1) ◽  
pp. 99 ◽  
Author(s):  
LJ Penrose
Keyword(s):  
Mosaic Virus ◽  
New South ◽  
New South Wales ◽  
Sugarcane Mosaic Virus ◽  
Grass Species ◽  
Mechanical Inoculation ◽  
South Wales ◽  
Johnson Grass ◽  
New Hosts ◽  
Virus Isolates

Sugarcane mosaic virus is widely distributed in New South Wales. It was isolated from 10 species of plants. Twenty-seven native and introduced grass species were susceptible to SCMV by mechanical inoculation. Seventeen new hosts of SCMV were recorded. Of 20 virus isolates from eight host species, only one—from sugarcane—failed to infect Johnson grass. The principal reservoir for sugarcane mosaic virus was Johnson grass.

Sign in / Sign up

Export Citation Format

Share Document