The common evolutionary history of badnaviruses and banana

Iskra-Caruana, Marie-Line; Duroy, Pierre‐Olivier; Chabannes, Matthieu; Muller, Emmanuelle

doi:10.1016/j.meegid.2013.10.013

Cited by 32 publications

(34 citation statements)

References 34 publications

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“…This situation is similar to that encountered for other badnaviruses (Borah et al, 2013), especially banana and sugarcane badnaviruses, which are both polyphyletic Iskra-Caruana et al, 2014;Muller et al, 2011). In banana, both episomal and endogenous badnavirus sequences exist and are classified into three separate clades of the phylogeny proposed by Iskra-Caruana et al (2014). Sequences from Clade I are both episomal and endogenous, and include infectious endogenous BSVs, whereas sequences from Clade II are exclusively endogenous and sequences from Clade III are most probably episomal (Gayral and Iskra-Caruana, 2009;Iskra-Caruana et al, 2010;James et al, 2011a;M.…”

Section: Phylogeny Of Edbvssupporting

confidence: 73%

“…In banana, both episomal and endogenous badnavirus sequences exist and are classified into three separate clades of the phylogeny proposed by Iskra‐Caruana et al . (). Sequences from Clade I are both episomal and endogenous, and include infectious endogenous BSVs, whereas sequences from Clade II are exclusively endogenous and sequences from Clade III are most probably episomal (Gayral and Iskra‐Caruana, ; Iskra‐Caruana et al ., ; James et al ., ; M. Chabannes et al ., CIRAD, Montpellier, unpublished data).…”

Section: Discussionmentioning

confidence: 97%

“…Previous phylogenetic studies of yam badnaviruses unveiled a high level of diversity among episomal and putative endogenous sequences (Bousalem et al ., ; Kenyon et al ., ). This situation is similar to that encountered for other badnaviruses (Borah et al ., ), especially banana and sugarcane badnaviruses, which are both polyphyletic (Harper et al ., ; Iskra‐Caruana et al ., ; Muller et al ., ). In banana, both episomal and endogenous badnavirus sequences exist and are classified into three separate clades of the phylogeny proposed by Iskra‐Caruana et al .…”

Section: Discussionmentioning

confidence: 98%

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The genome of African yam (Dioscorea cayenensis‐rotundata complex) hosts endogenous sequences from four distinct badnavirus species

Umber

Muller

Laboureau

et al. 2014

Molecular Plant Pathology

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Several endogenous viral elements (EVEs) have been identified in plant genomes, including endogenous pararetroviruses (EPRVs). Here, we report the first characterization of EPRV sequences in the genome of African yam of the Dioscorea cayenensis-rotundata complex. We propose that these sequences should be termed 'endogenous Dioscorea bacilliform viruses' (eDBVs). Molecular characterization of eDBVs shows that they constitute sequences originating from various parts of badnavirus genomes, resulting in a mosaic structure that is typical of most EPRVs characterized to date. Using complementary molecular approaches, we show that eDBVs belong to at least four distinct Badnavirus species, indicating multiple, independent, endogenization events. Phylogenetic analyses of eDBVs support and enrich the current taxonomy of yam badnaviruses and lead to the characterization of a new Badnavirus species in yam. The impact of eDBVs on diagnosis, yam germplasm conservation and movement, and breeding is discussed.

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Section: Phylogeny Of Edbvssupporting

confidence: 73%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 98%

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The genome of African yam (Dioscorea cayenensis‐rotundata complex) hosts endogenous sequences from four distinct badnavirus species

Umber

Muller

Laboureau

et al. 2014

Molecular Plant Pathology

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“…Initial tree(s) for the heuristic search were obtained automatically by applying Neighbor-Join and BioNJ algorithms to a matrix of pair wise distances estimated using the Maximum Composite Likelihood (MCL) approach, and then selecting the topology with superior log likelihood value. The 52 badnavirus sequences clustered into two major groups and group 1 could be divided into: subgroup 1a, which contained all Banana streak virus (BSVs) and Sugarcane bacilliform virus (SCBVs) of clade 3 published [ 46 ]; and subgroup 1b, which consisted of Gooseberry vein banding associated virus (GVBaV), RYNV, Grapevine vein clearing virus (GVCV), BsCVBV, YNMoV, DrMV, and Pelargonium vein banding virus (PVBV). The subgroup 1c comprised all the BSV species of clade 1 as per [ 46 ].…”

Section: Genome Organization and Replication Cyclementioning

confidence: 99%

Badnaviruses: The Current Global Scenario

Bhat

Höhn²,

Selvarajan

2016

Viruses

154

105

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Badnaviruses (Family: Caulimoviridae; Genus: Badnavirus) are non-enveloped bacilliform DNA viruses with a monopartite genome containing about 7.2 to 9.2 kb of dsDNA with three to seven open reading frames. They are transmitted by mealybugs and a few species by aphids in a semi-persistent manner. They are one of the most important plant virus groups and have emerged as serious pathogens affecting the cultivation of several horticultural crops in the tropics, especially banana, black pepper, cocoa, citrus, sugarcane, taro, and yam. Some badnaviruses are also known as endogenous viruses integrated into their host genomes and a few such endogenous viruses can be awakened, e.g., through abiotic stress, giving rise to infective episomal forms. The presence of endogenous badnaviruses poses a new challenge for the fool-proof diagnosis, taxonomy, and management of the diseases. The present review aims to highlight emerging disease problems, virus characteristics, transmission, and diagnosis of badnaviruses.

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“…At least one copy of its genome is present in many of the major cultivated bananas, including the plantains, the cooking bananas Saba and Bluggoe, and most of the locally popular acid sweet dessert bananas. The genome of M. balbisiana, however, contains integrated sequences of the pararetrovirus Banana streak virus (BSV), which upon hybridisation, can recombine to form infectious BSV and symptoms of that infection [41]. This discovery has limited the use of parents containing a M. balbisiana genome, thereby severely reducing the available banana breeders' gene pool.…”

Section: Conventional Breeding or Genetic Modificationmentioning

confidence: 99%

Modifying Bananas: From Transgenics to Organics?

et al. 2017

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Bananas are one of the top ten world food crops. Unlike most other major food crops, bananas are difficult to genetically improve. The challenge is that nearly all banana cultivars and landraces are triploids, with high levels of male and female infertility. There are a number of international conventional breeding programs and many of these are developing new cultivars. However, it is virtually impossible to backcross bananas, thus excluding the possibility of introgressing new traits into a current cultivar. The alternative strategy is to "modify" the cultivar itself. We have been developing the capacity to modify Cavendish bananas and other cultivars for both disease resistance and enhanced fruit quality. Initially, we were using transgenes; genes that were derived from species outside of the Musa or banana genus. However, we have recently incorporated two banana genes (cisgenes) into Cavendish; one to enhance the level of pro-vitamin A and the other to increase the resistance to Panama disease. Modified Cavendish with these cisgenes have been employed in a field trial. Almost certainly, the next advance will be to edit the Cavendish genome, to generate the desired traits. As these banana cultivars are essentially sterile, transgene flow and the outcrossing of modified genes into wild Musa species. are highly unlikely and virtually impossible in other triploid cultivars. Therefore, genetic changes in bananas may be compatible with organic farming.

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The common evolutionary history of badnaviruses and banana

Cited by 32 publications

References 34 publications

The genome of African yam (Dioscorea cayenensis‐rotundata complex) hosts endogenous sequences from four distinct badnavirus species

The genome of African yam (Dioscorea cayenensis‐rotundata complex) hosts endogenous sequences from four distinct badnavirus species

Badnaviruses: The Current Global Scenario

Modifying Bananas: From Transgenics to Organics?

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