‘NASPOT 12 O’ and ‘NASPOT 13 O’ Sweetpotato

Mwanga, R.O.M.; Kyalo, Gerald; Ssemakula, G.; Niringiye, Charles; Yada, Benard; Otema, Milton A.; Namakula, J.; Alajo, Agnes; Kigozi, Benjamin; Makumbi, Rose N.M.; Ball, Anna‐Marie; Grüneberg, Wolfgang J.; Low, Jan; Yencho, G. Craig

doi:10.21273/hortsci.51.3.291

Cited by 37 publications

(30 citation statements)

References 7 publications

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“…Although the effects of intermediate harvesting of sweet potato vines on production remain somewhat equivocal, the reasons for the variability are not entirely clear. However, it is apparent from the recent work of Mwanga et al [24], that there is great variability in the yield and composition of given varieties of sweet potato plant, depending on agro-climatic factors and cultivation practices. This variability, combined with the very different cultural and sampling practices reported in the extant literature, may help explain the apparent inconsistencies in results.…”

Section: Resultsmentioning

confidence: 99%

Early vine harvesting of dual-purpose sweet potato (Ipomoea batatas) increases feeding quality and total biomass without comprising tuber production

Gakige¹,

Gachuri²,

Butterbach‐Bahl³

et al. 2020

AJFAND

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Sweet potato is an important food crop throughout much of sub-Saharan Africa with the important attribute as a dual-purpose crop. While tuberous crops are grown for human consumption, the sweet potato can also provide substantial vine biomass suitable for feeding animals without competing for human feed resources. Sweet potato is generally low in nutrient other than carbohydrate. The newly developed orange-fleshed varieties of sweet potato, high in beta-carotene yield large quantities of vines with very little exploration of their agronomic attributes to date. Intermediate vine harvesting (ratooning) has been promoted as a strategy to further increase the value of sweet potato as a dual-purpose human/animal feed crop. The results of this practice on yields of other types of sweet potato have been equivocal or highly variable. Production effects on three new orange-fleshed dual-purpose sweet potato (Kenspot 1, SPK 013, SPK 117) developed by the International Potato Centre (CIP), of intermediate plus final (INT) versus final only (FIN) vine harvesting were assessed in a randomized block with a split plot trial. Cultivar SPK013 produced the greatest vine, tuber and total biomass yield of the three varieties tested, but also the greatest decline in tuber yields after intermediate vine harvesting. While intermediate harvesting increased vine yield in all varieties (p<0.05), in cultivar SPK013, it caused a 58% decline in tuber yield (p<0.05). The variation in performance between cultivars assessed in this study, reflects what is seen in the general literature. What is clear from the present study is that, there is a substantial interaction between environment/cultural practice and genotype. As such, it seems impossible to generalize that Intermediate vine harvesting is beneficial for vine production in the cultivars studied. It should be borne in mind that this practice may also be associated with a substantial decline in tuber yield in some cultivars. Thus, results should not be extrapolated to other varieties without investigation.

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Section: Resultsmentioning

confidence: 99%

Early vine harvesting of dual-purpose sweet potato (Ipomoea batatas) increases feeding quality and total biomass without comprising tuber production

Gakige¹,

Gachuri²,

Butterbach‐Bahl³

et al. 2020

AJFAND

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“…Sweet potato cultivars "New Kawogo" and "Resisto" sourced from virus-free sweet potato collections at the Makerere University Agricultural Research Institute (MUARIK) and Namulonge Crops Resources Research Institute, respectively were used. The white fleshed "New Kawogo" is Ugandan in origin and is virus resistant (Gasura and Mukasa, 2010;Mwanga et al, 2016), while the orange fleshed "Resisto" from the USA is virus susceptible (Mwanga and Ssemakula, 2011). These cultivars were used as parents in a full diallel cross, with reciprocals considered (Griffing, 1956).…”

Section: Plantmentioning

confidence: 99%

In silico prediction and segregation analysis of putative virus defense genes based on SSR markers in sweet potato F1 progenies of cultivars New Kawogo and Resisto

Ssamula

Okiror

Avrahami-Moyal

et al. 2019

Afr. J. Biotechnol.

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In sweet potato, an anti-virus defense mechanism termed reversion has been postulated to lead to virus freedom from once infected plants. The objectives of this study were to identify anti-virus defense genes and evaluate their segregation in progenies. Reference genes from different plant species were used to assemble transcript sequences of each sweet potato defense gene in silico. Sequences were used for evaluate phylogenetic relationships with similar genes from different plant species, mining respective defense genes and thereafter developing simple sequence repeats (SSRs) for segregation analysis. Eight potential defense genes were identified: RNA dependent RNA polymerases 1, 2, 5, and 6; Argonaute 1, and Dicer-like 1, 2, and 4. Identified genes were differentially related to those of other plants and were observed on different chromosomes. The defense genes contained mono-, di-, tri-, tetra, penta-, and hexa-nucleotide repeat motifs. The SSR markers within progenies were segregated in disomic, co-segregation, nullisomic, monosomic, and trisomic modes. These findings indicate the possibility of deriving and utilizing SSRs using published genomic information. Furthermore, and given that the SSR markers were derived from known genes on defined chromosomes, this work will contribute to future molecular breeding and development of resistance gene analogs in this economically important crop.

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“…Biofortified crops can easily reach rural populations who have limited access to diverse diets or other micronutrient interventions. Target micronutrient levels for biofortified crops are set to meet the specific dietary needs of women and children, based on existing consumption patterns (Bouis and Saltzman, 2017;Mwanga et al, 2016). Subsequently, biofortification may present a way to reach populations with preferred food traits especially where supplementation/conventional fortification activities may be limited (Organization, 2016).…”

Section: Biofortification Of Staple Food Crops With Carotenoidsmentioning

confidence: 99%

“…The primary evidence for the effectiveness of biofortification in accumulation of carotenoids in storage parts comes from Orange Sweet Potato (OSP). In Uganda, orange-fleshed landrace cultivars named "Ejumula" and "SPK004" (Kakamega) (Mwanga et al, 2007), and developed varieties (NASPOT 9 O" (NASPOT 10 O,NASPOT 12 O and NASPOT 13 O) with yellow roots (sign of pVACs accumulation), were released in 2004, 2007(Mwanga et al, 2016. Biofortified OSP varieties have been released in more than 15 countries across sub-Saharan Africa with a record adoption rates greater than 60% above control communities (Bouis and Saltzman, 2017).…”

Section: Sweet Potatomentioning

confidence: 99%

“…Biofortified OSP varieties have been released in more than 15 countries across sub-Saharan Africa with a record adoption rates greater than 60% above control communities (Bouis and Saltzman, 2017). Introduction of these varieties resulted in increased vitamin A intakes among children and women, improved vitamin A status among children and decreased the prevalence of low serum retinol by 9% points (Mwanga et al, 2016). Women who consumed OSP also had a lower likelihood of having marginal vitamin A deficiency.…”

Section: Sweet Potatomentioning

confidence: 99%

See 1 more Smart Citation

Advances in carotenoid increments in storage parts of African staple crops

Nuwamanya¹,

Atwijukire²

2019

J. Plant Breed. Crop Sci.

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The importance of vitamin A and other carotenoids in controlling micronutrient based deficiencies in particular VAD has been emphasized in recent years. This has resulted into demands for availing these nutrients in forms that are easily accessible for most of the populations in micronutrient deficient areas. Specifically in Africa, various programs have been instituted to bio-fortify crops with nutrients with more emphasis being put on Vitamin A fortification. Much as advances have been made in this area, a number of programs have registered little success while others have not taken off. In this review, advances in breeding for vitamin A increments are discussed. Countries where successes have been achieved are also highlighted while efforts in a number of areas for the different staple crops have been given due emphasis. In particular, breeding strategies have been discussed, and examples of successful breeding strategies highlighted to inform future efforts. In addition, the effect of processing on retention of vitamin A in processed products has been discussed with specific recommendations on identification of crop specific processing procedures. Such procedures should be optimized before adoption to allow for minimal losses in vitamin A and other related nutrients. We conclude that much as advances have been made, specific efforts are still needed in certain staples in order to provide benefits to the African consumers.

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‘NASPOT 12 O’ and ‘NASPOT 13 O’ Sweetpotato

Cited by 37 publications

References 7 publications

Early vine harvesting of dual-purpose sweet potato (Ipomoea batatas) increases feeding quality and total biomass without comprising tuber production

Early vine harvesting of dual-purpose sweet potato (Ipomoea batatas) increases feeding quality and total biomass without comprising tuber production

In silico prediction and segregation analysis of putative virus defense genes based on SSR markers in sweet potato F1 progenies of cultivars New Kawogo and Resisto

Advances in carotenoid increments in storage parts of African staple crops

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