‘NASPOT 7’, ‘NASPOT 8’, ‘NASPOT 9 O’, ‘NASPOT 10 O’, and ‘Dimbuka-Bukulula’ Sweetpotato

Mwanga, R.O.M.; Odongo, B.; Niringiye, Charles; Alajo, Agnes; Kigozi, Benjamin; Makumbi, Rose N.M.; Lugwana, Esther; Namukula, Joweria; Mpembe, I.; Kapinga, R.; Lemaga, B.; Nsumba, J.; Tumwegamire, Silver; Yencho, G. Craig

doi:10.21273/hortsci.44.3.828

Cited by 53 publications

(54 citation statements)

References 12 publications

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“…The contrast observed in the present study is likely due to the limited number and a more narrow set of cultivars used compared with previous studies. The high TYLD observed for cultivars Ejumula, SPK004/6, and SPK004/6/6 confirm previous results with the same cultivars (Mwanga et al, 2007, 2009). All the three cultivars were released in Uganda and represent the potential gains in breeding for OFSP cultivars with high TYLD, RDM, and RBC (Mwanga et al, 2009).…”

Section: Discussionsupporting

confidence: 90%

Genotype × Environment Interactions for East African Orange‐Fleshed Sweetpotato Clones Evaluated across Varying Ecogeographic Conditions in Uganda

et al. 2016

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African dry and starchy (DS) orange‐fleshed sweetpotato [Ipomoea batatas (L.) Lam] (OFSP) cultivars, distinct from American moist or medium dry and sweet OFSP, have potential to fight vitamin A deficiency (VAD) in the world. This study assessed the genotype × environment (G × E) interactions in multienvironment trials (METs), the genetic correlations for total root yield (TYLD), biomass (BIOM), harvest index (HI), root dry matter (RDM), root starch (RST), root sucrose (RSU), root β‐carotene, (RBC), root Fe (RFE), root Zn (RZN), root Ca (RCA), and root Mg (RMG) and the potential contributions of the cultivars to fight VAD and mineral deficiencies. Nine DS OFSP cultivars, (Ejumula, Zambezi, Carrot_C, Kakamega, KMI61, Abuket_1, SPK004/6/6, SPK004/6 and Naspot_5/50) and a medium dry and sweet OFSP cultivar (Resisto) were tested in METs in Uganda. The σG×E2 components were smaller than σG2 components for HI, RDM, RST, RSU, and RBC, making it possible to ably select for the traits in the early stages. The σG×E2 components were larger than σG2 components for TYLD and mineral traits. Thus, like yield, breeding for mineral traits in sweetpotato is complex, requiring prior data on the causes of the G × E interactions. Medium to high positive correlations among mineral traits favor parallel selection, and it merits further study to efficiently improve the mineral trait complex by an index. Clearly, a 50‐ to 100‐g ration of all the cultivars, except Naspot_5/50, can provide 100% recommended dietary allowance of vitamin A for a 5‐ to 8‐yr‐old child.

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Section: Discussionsupporting

confidence: 90%

Genotype × Environment Interactions for East African Orange‐Fleshed Sweetpotato Clones Evaluated across Varying Ecogeographic Conditions in Uganda

et al. 2016

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“…The10 varieties had higher root yields than the released checks. In field trials in different years total root yields for the 19 released sweetpotato varieties in Uganda ranged from 14.9 t ha -1 for SPK004 to 31.0 t ha -1 for Dimbuka (Mwanga et al, 2001;Mwanga et al, 2003;Mwanga et al, 2007Mwanga et al, , 2009. In this germplasm evaluation, the mean root yields and ranking among the genotypes varied with the site (Table 1) as observed in Uganda and Peru, implying significant site x genotype, genotype x season, and site x genotype x season interactions (Byamukama et al, 2002;Grüneberg et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of Ugandan sweetpotato germplasm for yield, dry matter and disease resistance

Yada

Tukamuhabwa

Alajo

et al. 2011

South African Journal of Plant and Soil

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“…The SPVD resistance performance exhibited by the SPVD‐resistant progeny is similar to that of the female parent, New Kawogo, which was reported to have moderate SPVD field resistance (Mwanga et al, 2001). Most of the released high‐yielding and orange‐fleshed cultivars in Uganda are resistant to SPVD (Mwanga et al, 2009). Some of the superior genotypes in this study could be released for production as high‐yielding cultivars in low‐SPVD‐pressure SSA countries after yield trials.…”

Section: Discussionmentioning

confidence: 99%

Selection of Simple Sequence Repeat Markers Associated with Inheritance of Sweetpotato Virus Disease Resistance in Sweetpotato

et al. 2017

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Sweetpotato virus disease (SPVD), a complex of Sweet potato chlorotic stunt virus (SPCSV; Crinivirus) and Sweet potato feathery mottle virus (SPFMV; Potyvirus) causes high yield losses in sub‐Saharan Africa (SSA). The development of resistant cultivars to SPVD has been limited by the complex sweetpotato [Ipomoea batatas (L.) Lam. var. batatas] genetics and high levels of mutations in the causal viruses. The objectives of this study were to understand the inheritance of SPVD resistance and identify simple‐sequence repeat (SSR) markers associated with its resistance in a biparental sweetpotato mapping population. A total of 287 progeny and parents of the ‘New Kawogo’ × ‘Beauregard’ population were genotyped with 250 SSR markers and phenotyped for SPVD resistance at three sites and two seasons in Uganda. The broad‐sense heritability for SPVD resistance was 0.51. Two progeny showed positive transgressive segregation for overall genotype mean SPVD severity across sites and seasons. A total of seven SSR markers were significantly associated with SPVD resistance in this population. These markers and other SSRs need to be used to fine map the quantitative trait loci (QTL) of SPVD resistance for future implementation of marker‐assisted selection (MAS) for SPVD resistance in sweetpotato.

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‘NASPOT 7’, ‘NASPOT 8’, ‘NASPOT 9 O’, ‘NASPOT 10 O’, and ‘Dimbuka-Bukulula’ Sweetpotato

Cited by 53 publications

References 12 publications

Genotype × Environment Interactions for East African Orange‐Fleshed Sweetpotato Clones Evaluated across Varying Ecogeographic Conditions in Uganda

Genotype × Environment Interactions for East African Orange‐Fleshed Sweetpotato Clones Evaluated across Varying Ecogeographic Conditions in Uganda

Field evaluation of Ugandan sweetpotato germplasm for yield, dry matter and disease resistance

Selection of Simple Sequence Repeat Markers Associated with Inheritance of Sweetpotato Virus Disease Resistance in Sweetpotato

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