First Report of <i>Sri Lankan Cassava Mosaic Virus</i> Infecting Cassava in Vietnam

Uke, Ayaka; Hoat, Trinh Xuan; Quan, Mai Van; Liem, Nguyen Van; Ugaki, Masashi; Natsuaki, Keiko T.

doi:10.1094/pdis-05-18-0805-pdn

Cited by 34 publications

(28 citation statements)

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“…It is one of several geographically distinct virus species causing cassava mosaic disease (CMD), a major disease of cassava (Manihot esculenta Crantz), in Africa and Asia (1). SLCMV was characterized for the first time in Sri Lanka in 1998 (2); it also occurs in India, and since 2015, it has emerged in Southeast Asia (3,4). The occurrence of SLCMV in Thailand, the world's largest exporter of cassava, has not yet been confirmed, although unofficial reports indicate that eradication activities have been taking place in the northeastern region of the country since 2018.…”

mentioning

confidence: 99%

Nanopore-Based Complete Genome Sequence of a Sri Lankan Cassava Mosaic Virus ( Geminivirus ) Strain from Thailand

Leiva

Siriwan

López-Álvarez

et al. 2020

Microbiol Resour Announc

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mentioning

confidence: 99%

Nanopore-Based Complete Genome Sequence of a Sri Lankan Cassava Mosaic Virus ( Geminivirus ) Strain from Thailand

Leiva

Siriwan

López-Álvarez

et al. 2020

Microbiol Resour Announc

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“…These lines are currently being evaluated in different eco-regions of Vietnam to determine their suitability. Recently, breeding for disease resistance has received attention after severe outbreaks of cassava witches' broom disease (CWBD) in Central and South East regions (Graziosi et al 2016) and SLCMV in Tay Ninh province, 2017 (Uke et al 2018.…”

Section: Vietnammentioning

confidence: 99%

“…This informal distribution of the seed system is a major cause for the spread of cassava diseases like SLCMV and CWBD (Graziosi et al 2016), threatening its productivity. SLCMV was first reported in a province of Cambodia in 2016 (Wang et al 2016), but now been reported in four other provinces of Cambodia and one province in Vietnam (Uke et al 2018). Thus, regionally coordinated research on seed systems, pest and disease control, and capacity-building efforts should be launched to ensure the profitability and sustainability of cassava production systems in Asia (Graziosi et al 2016).…”

Section: Regionally Coordinated Research and Development In Asiamentioning

confidence: 99%

Cassava breeding and agronomy in Asia: 50 years of history and future directions

Malik¹,

Kongsil

Nguyen

et al. 2020

Breed. Sci.

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In Asia, cassava (Manihot esculenta) is cultivated by more than 8 million farmers, driving the rural economy of many countries. The International Center for Tropical Agriculture (CIAT), in partnership with national agricultural research institutes (NARIs), instigated breeding and agronomic research in Asia, 1983. The breeding program has successfully released high-yielding cultivars resulting in an average yield increase from 13.0 t ha-1 in 1996 to 21.3 t ha-1 in 2016, with significant economic benefits. Following the success in increasing yields, cassava breeding has turned its focus to higher-value traits, such as waxy cassava, to reach new market niches. More recently, building resistance to invasive pests and diseases has become a top priority due to the emergent threat of cassava mosaic disease (CMD). The agronomic research involves driving profitability with advanced technologies focusing on better agronomic management practices thereby maintaining sustainable production systems. Remote sensing technologies are being tested for trait discovery and large-scale field evaluation of cassava. In summary, cassava breeding in Asia is driven by a combination of food and market demand with technological innovations to increase the productivity. Further, exploration in the potential of data-driven agriculture is needed to empower researchers and producers for sustainable advancement.

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“…25.445583 doi: bioRxiv preprint was conducted in the Cambodian province of Stung Treng, which experienced an SCLMV outbreak despite its distant location from Ratanakiri [12]. Additionally, the Vietnam Academy of Agricultural Sciences Plant Protection Research Institute reported CMD in Tay Ninh province, where it damaged the established crop spanning more than 1200 ha of land in 2017 [13]. Based on a survey conducted in July and August 2018, the Department of Agriculture (DOA of Thailand identified 22 plants with CMD symptoms in a 2.27-ha cassava plantation in Sisaket and Surin provinces in northeastern Thailand.…”

Section: Introductionmentioning

confidence: 99%

Survey and Molecular Detection of Sri Lankan Cassava Mosaic Virus in Thailand

Siriwan

Saokham

Hemniam

et al. 2021

Preprint

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Cassava plantations in an area of 458 ha spanning five provinces along the Thailand–Cambodia border were surveyed from October 2018 to July 2019 to determine the prevalence of cassava mosaic disease (CMD) caused by Sri Lankan cassava mosaic virus (SLCMV) in the region. CMD prevalence was 40% in the whole area and 80% in Prachinburi, 43% in Sakaeo, 37% in Burium, 25% in Surin, and 19% in Sisaket provinces. Disease severity was generally scored as 2–3. The highest average disease severity was in Sakaeo province (3.7), followed by Buriram (3.6), Prachinburi (2.88), Surin (2.5), and Sisaket (2.4) provinces. Asymptomatic plants were identified in Surin (12%), Prachinburi (5%), Sakaeo (0.2%), and Buriram (0.1%) by PCR analysis. Interestingly, cassava cultivars CMR-89 and Rayong 11 were susceptible to CMD. In approximately 95% of cases, the infection was transmitted by whitefly ( Bemisia tabaci ), which had a high population density in Prachinburi but was sparse in Surin, with the largest populations observed in May and June. Nucleotide sequencing of the mitochondrial cytochrome oxidase 1 ( mtCO1 ) gene of whitefly ( Bemisia tabaci ) in Thailand revealed a similarity to the Asia II 1 whitefly gene. Furthermore, the AV1 gene—which encodes the capsid protein—showed 90% nucleotide identity with SLCMV. Phylogenetic analysis of completed nucleotide sequences of DNA-A and DNA-B components of the SLCMV genome determined by rolling circle amplification (RCA) indicated that they were similar to the nucleotide sequence of SLCMV isolates from Thailand, Vietnam, and Cambodia. These results provide important insights into the distribution, impact, and spread of CMD and SLCMV in Thailand.

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First Report of Sri Lankan Cassava Mosaic Virus Infecting Cassava in Vietnam

Cited by 34 publications

References 4 publications

Nanopore-Based Complete Genome Sequence of a Sri Lankan Cassava Mosaic Virus ( Geminivirus ) Strain from Thailand

Nanopore-Based Complete Genome Sequence of a Sri Lankan Cassava Mosaic Virus ( Geminivirus ) Strain from Thailand

Cassava breeding and agronomy in Asia: 50 years of history and future directions

Survey and Molecular Detection of Sri Lankan Cassava Mosaic Virus in Thailand

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