Incidence and infection rate ofMaize streak virusdisease byCicadulina triangularon maize plants and its distribution from the lowest diseased leaf under tropical conditions

Fajinmi, A. A.; Dokunmu, A.O.; Akheituamen, D.O.; Onanuga, K.A.

doi:10.1080/03235408.2012.694251

Cited by 9 publications

(4 citation statements)

References 18 publications

(23 reference statements)

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“…The ranges of the titres presented here further indicated that there is variability for resistance to the double viruses in the maize population. ELISA technique has been widely used to detect the presence of viruses in maize with or without disease symptoms (Kumar et al, 2004;Fajinmi et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Genetic variability in a quality protein maize (QPM) population under double viral infections

Oloyede-Kamiyo¹,

Kareem²,

Ajagbe³

2018

J. Plant Breed. Crop Sci.

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The type of gene action conferring combined resistance to maize streak virus (MSV) and maize stripe virus (MStV) was investigated in a Quality Protein Maize (QPM) population, ART/98/SW6-OB. Full-sib and half-sib progenies generated using North Carolina Design I mating scheme were evaluated in 2015 and 2016 in two locations endemic to the viral diseases in Nigeria. Serological study was also conducted on the progenies to validate the disease scores on the field. Significant mean square of genotypes was observed for MSV severity, MStV incidence and severity, plant height and days to flowering, while mean square of environment by females in males' interaction was significant for grain yield and MSV incidence. Estimates of additive variances were larger than dominance variance for grain yield and MSV severity with moderate to high narrow-sense heritability estimates. This indicates that there is adequate genetic variability for improving grain yield and resistance to MSV in the maize population. The mean titre values of MSV and MStV for the progenies were significantly higher than the healthy control. MSV and MStV incidence were negatively correlated to days to 50% silking. Titre values were negatively correlated with grain yield but positively correlated with MSV and MStV incidence. Recurrent selection method that capitalizes on both additive and dominance variances would be effective in improving the population for grain yield and resistance to MSV and MStV diseases.

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Section: Resultsmentioning

confidence: 99%

Genetic variability in a quality protein maize (QPM) population under double viral infections

Oloyede-Kamiyo¹,

Kareem²,

Ajagbe³

2018

J. Plant Breed. Crop Sci.

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“…Incidence was determined using the following equation [23]: Severity was assessed, and the disease index was calculated using the equation proposed by [24,25]:…”

Section: Evaluation Of Agronomic Variablesmentioning

confidence: 99%

Biological Exploration and Physicochemical Characteristics of Tomato Brown Rugose Fruit Virus in Several Host Crops

Vasquez Gutierrez,

López López,

Frías Treviño

et al. 2024

Agronomy

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Tomato brown rugose fruit virus (ToBRFV) is considered an emerging disease and a viral pandemic for tomato consumers. The objectives of this research were to analyze the biological and physicochemical characteristics of ToBRFV in tomato and tobacco plants, as well as to evaluate its natural host range. Inoculant seeds were recovered from ToBRFV-infected tomato samples in Coahuila, Mexico, and confirmed by RT-PCR. In the first greenhouse experiment, tomato plants of the F1 hybrid variety 172–300 (Yüksel), infected with ToBRFV, were used to evaluate viral inclusions (VI), dilution endpoint (DEP), the incubation period (IP), and latency period (LP). In a greenhouse experiment, Nicotiana longiflora plants were inoculated with ToBRFV to determine the in vitro longevity (IVL) and thermal inactivation (TI) of the virus in sap. Finally, the inoculation of tomato plants grown in open fields was carried out to evaluate transmission to natural hosts. The plants tested for possible ToBRFV reservoirs near the inoculum source were inspected and confirmed by a double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA). The results indicate that the VIs on tomato leaves manifested as X-bodies and rounded, stacked plaques within epidermal cells. The DEP required to induce the infection in plants was from a ToBRFV concentration of 1 × 10−5.5, the IP of ToBRFV occurred 9 to 12 days post-inoculation, and LP could be detected one day after inoculation. The TI of ToBRFV in N. longiflora plants occurred at 85 °C for 30 min. Ipomoea purpurea, Mirabilis jalapa, Clematis drummondii, and Solanum tuberosum were newly identified hosts of ToBRFV. The results found contribute to a better understanding of the impact of ToBRFV, managing and preventing the spread of ToBRFV in diverse environments.

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“…Disease presence and spread is directly or indirectly affected by various factors (environment and weather condition, insect infestation, and other mechanical factors). Also, Fajinmi et al (2012) reported that the incidence of viral diseases causes great yield loss in crop production in Nigeria.…”

Section: Introductionmentioning

confidence: 99%

Molecular identification of viruses infecting maize (Zea mays L.) in Ekiti State, south-western Nigeria

Fajinmi¹,

Bamiteko²,

Fajinmi³

et al. 2019

Nig. J. Biotechnol

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Maize is one of the most commonly cultivated crops in southwestern Nigeria, but its production is constrained by virus diseases. Information on viruses infecting maize within the region is still limited. Therefore, a survey was conducted to identify the viruses infecting maize on randomly selected farmers' cultivated maize fields in 16 local government areas in Ekiti State, southwestern Nigeria using molecular detection tools. Four cultivated maize fields were randomly surveyed in each local government area with an average size of 50 m x 50 m. The sampling was done on fifty randomly selected plants per field. Viral diseases were confirmed on maize plants through visual symptoms observations and serological diagnosis, although severity and incidence varied per location. Visible symptoms observed include chlorotic patches, severe streaking, red pigments and venation along mid rib and vein with stunted growth. Although only Maize streak virus (MSV) and Maize chlorotic mottle virus (MCMV) were targeted, serological assay indicated the occurrence of only MSV. Polymerase chain reaction (PCR) confirmed the presence of MSV while MCMV was negative. This provides additional information to the prevalence of MSV as an ongoing threat to maize production in southwest Nigeria,

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Incidence and infection rate ofMaize streak virusdisease byCicadulina triangularon maize plants and its distribution from the lowest diseased leaf under tropical conditions

Cited by 9 publications

References 18 publications

Genetic variability in a quality protein maize (QPM) population under double viral infections

Genetic variability in a quality protein maize (QPM) population under double viral infections

Biological Exploration and Physicochemical Characteristics of Tomato Brown Rugose Fruit Virus in Several Host Crops

Molecular identification of viruses infecting maize (<i>Zea mays</i> L.) in Ekiti State, south-western Nigeria

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