Incidence and distribution of viruses of Taro (<i>Colocasia esculenta</i>) in Pacific Island countries

Revill, Peter; Jackson, G. V. H.; Hafner, Gregory; Yang, Ilin; Maino, Macquin; Dowling, Michelle; Devitt, Luke; Dale, James L.; Harding, Robert M.

doi:10.1071/ap05032

Cited by 36 publications

(39 citation statements)

References 10 publications

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“…Virus infection in taro has been reported to affect both the quality and quantity of the harvested corms, with production losses ranging from 20% to 60% and, in some cases, plant death. These losses often result from the synergistic interactions of multiple virus infections (Rana et al ., ; Elliott et al ., ; Revill et al ., ); however, the role of badnaviruses in these interactions remains poorly understood. Similar to previous studies (Yang et al ., ; Revill et al ., ), no correlation was observed between the presence of the badnavirus‐like sequences and symptoms in either taro or tannia plants in this study, with virus sequences amplified from plants both with and without symptoms using PCR and RCA.…”

Section: Discussionmentioning

confidence: 99%

“…These losses often result from the synergistic interactions of multiple virus infections (Rana et al ., ; Elliott et al ., ; Revill et al ., ); however, the role of badnaviruses in these interactions remains poorly understood. Similar to previous studies (Yang et al ., ; Revill et al ., ), no correlation was observed between the presence of the badnavirus‐like sequences and symptoms in either taro or tannia plants in this study, with virus sequences amplified from plants both with and without symptoms using PCR and RCA. However, because mixed infections are common in taro (Revill et al ., ), testing the samples for other viruses is necessary to shed further light on any symptoms associated with badnavirus infection.…”

Section: Discussionmentioning

confidence: 99%

“…TaBV is transmitted mainly by vegetative propagation, mealybugs in a semipersistent manner, and in some cases through seed or pollen, but it is not mechanically transmissible (Gollifer et al ., ; Macanawai et al ., ). Although no consistent symptoms have been associated with TaBV infection, there have been some reports of mild symptoms such as vein clearing, stunting and downward curling of the leaf blades in some cultivars (Yang et al ., ; Revill et al ., ; Kidanemariam et al ., ).…”

Section: Introductionmentioning

confidence: 99%

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Identification and molecular characterization of Taro bacilliform virus and Taro bacilliform CH virus from East Africa

et al. 2018

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Taro (Colocasia esculenta) and tannia (Xanthosoma sp.) are important root crops cultivated mainly by small‐scale farmers in sub‐Saharan Africa and the South Pacific. Viruses are known to be one of the most important constraints to production, with infections resulting in severe yield reduction. In 2014 and 2015, surveys were conducted in Ethiopia, Kenya, Tanzania and Uganda to determine the identity of viruses infecting taro in East Africa. Screening of 392 samples collected from the region using degenerate badnavirus primers revealed an incidence of 58–74% among the four countries surveyed, with sequence analysis identifying both Taro bacilliform virus (TaBV) and Taro bacilliform CH virus (TaBCHV). TaBCHV was identified from all four countries while TaBV was identified in all except Ethiopia. Full‐length sequences from representative TaBV and TaBCHV isolates showed that the genome organization of TaBV isolates from East Africa was consistent with previous reports while TaBCHV isolates from East Africa were found to encode only four ORFs, distinct from a previous report from China. Phylogenetic analysis showed that all East African TaBV isolates form a single subgroup within known TaBV isolates, while TaBCHV isolates form at least two distinct subgroups. To the authors' knowledge, this is the first report describing the occurrence and genome organization of TaBV and TaBCHV isolates from East Africa and the first full‐length sequence of the two viruses from tannia.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Identification and molecular characterization of Taro bacilliform virus and Taro bacilliform CH virus from East Africa

et al. 2018

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“…A conservative estimate of 10 years or more is needed from the time pollination is initiated till the new, improved cultivar finally reaches a large number of farmers [16]. However, viable seed production depends on the availability and compatibility of resistant germplasms as well as the vagaries of weather and pests and diseases [19]. Several researchers have reported on the production of improved taro cultivars through tissue culture [20][21].…”

Section: * Corresponding Authormentioning

confidence: 99%

Potentials and challenges of sustainable taro (Colocasia esculenta) production in Nigeria

2016

J App Biol Biotech

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During the past years, precisely [1965][1966][1967][1968][1969][1970][1971][1972][1973][1974][1975][1976][1977][1978][1979][1980], yam and taro reigned supreme in the Southern parts of Nigeria. Yam was the king and taro the queen. They were then the staple food of choice and were even offered to the gods. Their acceptance and ascendancy were challenged by the arrival and domestication of the easy growers (plantain, banana, maize and later cassava, tannia and sweet potato). The easy growers gained recognition and prominence as staple foods and subsequently replaced the earlier staples. Thus, cassava and sweet potato superseded yam and taro respectively. Nutritionally, taro has broader compliments of vitamins and nutrients compared to other root and tuber crops. The domestication of the new crops which are relatively more yielding and at the same time enjoys international leverage in research and development pose enormous challenges for the future of taro as a major crop. Strategic options for increase in taro production and consumption should be on consumer education and on its nutritional and health benefits. Increased attention on taro research will provoke a better understanding and contributions the crop can offer in the areas of food security, health and economic empowerment. The paper now reviews some of the nutritional and medicinal benefits of taro. Its contributions as an industrial crop will also be highlighted with special emphasis on the challenges facing taro crop cultivation in Nigeria and the possible approaches to enhance its sustainable production.

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“…Taro is the most widely cultivated species in the Colocasia genus (Vinning, 2003) and it is the fourth most consumed tuber crop in the world (Revill et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Agro-morphological characterization of some taro (Colocasia esculenta (L.) Schott.) germplasms in Ghana

Boampong¹,

Aboagye²,

Nyadanu³

et al. 2018

J. Plant Breed. Crop Sci.

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Incidence and distribution of viruses of Taro (Colocasia esculenta) in Pacific Island countries

Cited by 36 publications

References 10 publications

Identification and molecular characterization of Taro bacilliform virus and Taro bacilliform CH virus from East Africa

Identification and molecular characterization of Taro bacilliform virus and Taro bacilliform CH virus from East Africa

Potentials and challenges of sustainable taro (Colocasia esculenta) production in Nigeria

Agro-morphological characterization of some taro (Colocasia esculenta (L.) Schott.) germplasms in Ghana

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