Resistance to yellow vein mosaic virus in okra: a review

Shetty, Anoop A.; Singh, J. P.; Singh, D. P.

doi:10.1080/01448765.2013.793165

Cited by 18 publications

(12 citation statements)

References 8 publications

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“…Its fruits are harvested when immature and are commonly consumed as salads, soups, and stews (Salameh, 2014 ). The roots and stems are used for cleaning the cane-juice during brown-sugar preparation (Shetty et al, 2013 ). The seeds have also gained much interest as a new oil (30–40%) and protein (15–20%) source (Gemede et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Biotechnological Advancements and Begomovirus Management in Okra (Abelmoschus esculentus L.): Status and Perspectives

et al. 2017

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Despite the importance of okra, as one of the important vegetable crop, very little attention has been paid to its genetic improvement using advanced biotechnological tools. The exploitation of marker assisted breeding in okra is often limited due to the availability of a few molecular markers, the absence of molecular genetic-map(s), and other molecular tools. Chromosome linkage-groups were not yet constructed for this crop and reports on marker development are very scanty and mostly hovering around cultivar characterization. Besides, very little progress has been observed for transgenic development. However, high throughput biotechnological tools like chromosome engineering, RNA interference (RNAi), marker-assisted recurrent selection (MARS), genome-wide selection (GWS), targeted gene replacement, next generation sequencing (NGS), and nanobiotechnology can provide a rapid way for okra improvement. Further, the etiology of many deadly viral diseases like the yellow vein mosaic virus (YVMV) and okra enation leaf curl virus (OELCV) in okra is broadly indistinct and has been shown to be caused by various begomovirus species. These diseases cause systemic infections and have a very effective mode of transmission; thus, preventing their spread has been very complicated. Biotechnological interventions have the potential to enhance okra production even under different viral-stress conditions. In this background, this review deals with the biotechnological advancements in okra per se along with the begomoviruses infecting okra, and special emphasis has been laid on the exploitation of advanced genomic tools for the development of resistant varieties.

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Section: Introductionmentioning

confidence: 99%

Biotechnological Advancements and Begomovirus Management in Okra (Abelmoschus esculentus L.): Status and Perspectives

et al. 2017

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“…In India and Bangladesh, screens have revealed resistance and tolerance to be present in some cultivated varieties and wild species of okra against yellow vein mosaic disease (OYVMD), which is also caused by begomoviruses [84]. The genetic material identified in these screens may be of value also for adoption in breeding programs for resistance/tolerance to begomoviruses present in Africa.…”

Section: Resistancementioning

confidence: 99%

Begomovirus disease complex: emerging threat to vegetable production systems of West and Central Africa

et al. 2015

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Vegetables play a major role in the livelihoods of the rural poor in Africa. Among major constraints to vegetable production worldwide are diseases caused by a group of viruses belonging to the genus Begomovirus, family Geminiviridae. Begomoviruses are plant-infecting viruses, which are transmitted by the whitefly vector Bemisia tabaci and have been known to cause extreme yield reduction in a number of economically important vegetables around the world. Several begomoviruses have been detected infecting vegetable crops in West and Central Africa (WCA). Small single stranded circular molecules, alphasatellites and betasatellites, which are about half the size of their helper begomovirus genome, have also been detected in plants infected by begomoviruses. In WCA, B. tabaci has been associated with suspected begomovirus infections in many vegetable crops and weed species. Sequencing of viral genomes from crops such as okra resulted in the identification of two previously known begomovirus species (Cotton leaf curl Gezira virus and Okra yellow crinkle virus) as well as a new recombinant begomovirus species (Okra leaf curl Cameroon virus), a betasatellite (Cotton leaf curl Gezira betasatellite) and new alphasatellites. Tomato and pepper plants with leaf curling were shown to contain isolates of new begomoviruses, collectively referred to as West African tomato-infecting begomoviruses (WATIBs), new alphasatellites and betasatellites. To study the potential of weeds serving as begomovirus reservoirs, begomoviruses and satellites in the weed Ageratum conyzoides were characterized. Sequence analyses showed that they were infected by isolates of a new begomovirus (Ageratum leaf curl Cameroon virus) that belong to the WATIBs group, a new betasatellite (Ageratum leaf curl Cameroon betasatellite), an alphasatellite and two types of defective recombinants between a begomovirus and an alphasatellite. Putative recombinations were detected in begomovirus genomes for all four plant species studied, indicating that recombination is an important mechanism for their evolution. A close relationship between the begomoviruses infecting pepper and tomato and A. conyzoides and the detection of the same alphasatellite in them support the idea that weeds are important reservoirs for begomoviruses and their satellites. With this high diversity, recombination potential and transmission by B. tabaci, begomoviruses and ssDNA satellites pose a serious threat to crop production in West and Central Africa.

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“…As yield is a complex trait and for vegetable crops, the only improvement of yield is not the only priority to the breeders, the resistance to different biotic and abiotic stresses also needs to be considered simultaneously. Although the number of hybrids having resistance to YVMV, a major viral disease of okra is already developed by several public and private sector organizations, it should be done constantly, as resistance against viral diseases is not quite stable and cannot be controlled fully by chemical means (Shetty et al ., 2013). With this aim, the present investigation was carried out to identify good combining parents through line × tester mating design followed by developing superior hybrids which not only exhibit high yield but also showing resistance against YVMV disease.…”

Section: Discussionmentioning

confidence: 99%

“…Okra, belonging to the family Malvaceae is one of the most popular vegetable crops of tropics and sub-tropics across the world with a considerable area under cultivation in Asia and Africa (Shetty et al ., 2013). It is gaining more importance due to multi-purpose uses of its tender and delicious green pods which are used either in raw, cooked, or canned form in India and other okra growing regions (Mihretu et al ., 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The resistance breakdown to YVMV has also been reported due to the emergence of B biotype of whitefly having a wider host range and mutation, multiplication and recombination events within the DNA of begomovirus . Therefore, the development of high yielding hybrids along with stable resistance to YVMV disease is a continuous process (Shetty et al ., 2013) since when Vijayaraghavan and Warrier (1946) first reported the presence of heterosis for yield and its contributing traits in okra.…”

Section: Introductionmentioning

confidence: 99%

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Determining genetic combining ability, heterotic potential and gene action for yield contributing traits and Yellow Vein Mosaic Virus (YVMV) resistance in Okra (Abelmoschus esculentus(L.) Monech.)

Das

Yadav

Choudhary

et al. 2020

Plant Genet. Resour.

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Breeding for resistance to biotic stress and higher yield is a continuous process. Thus, the identification of desirable parents with good combining ability and nature of gene action for the target trait is of utmost importance. Hence, in this present investigation, 10 lines and three testers of Okra were crossed in line × tester mating design to generate 30 testcross progenies and their evaluation along with parents and check in a randomized complete block design with three replications. To depict the true picture of genetic variation among the parental genotypes, molecular diversity analysis was also carried out using genomic-simple sequence repeats before crossing to ascertain that sufficient variability is present among the parents. The molecular analysis grouped the parental genotypes into four clusters (I–IV). The analysis of variance revealed that all the treatments were significant for most of the traits. The combining ability analysis suggested Pusa A-4 as the best general combiner for earliness, Pusa Bhindi-5 for high yield, and DOV-92 for fruit length, plant height, yield per plant, and coefficient of infection for Yellow Vein Mosaic Virus Disease resistance. Similarly, the specific combining ability analysis suggested that the cross combinations DOV-92 × Pusa Bhindi-5 followed by DOV-92 × Pusa A-4 and DOV-92 × Pusa Sawani exhibit high economic heterosis for yield per plant as well as for disease resistance. Finally, estimation of the degree of dominance and predictability ratio was also worked out which indicated the prevalence of non-additive gene action for most of the traits pointing towards sufficient scope for heterosis breeding in Okra.

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Resistance to yellow vein mosaic virus in okra: a review

Cited by 18 publications

References 8 publications

Biotechnological Advancements and Begomovirus Management in Okra (Abelmoschus esculentus L.): Status and Perspectives

Biotechnological Advancements and Begomovirus Management in Okra (Abelmoschus esculentus L.): Status and Perspectives

Begomovirus disease complex: emerging threat to vegetable production systems of West and Central Africa

Determining genetic combining ability, heterotic potential and gene action for yield contributing traits and Yellow Vein Mosaic Virus (YVMV) resistance in Okra (Abelmoschus esculentus(L.) Monech.)

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