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Tag Archives: Molecular marker

SASHA Brief 2014: Tackling Virus Resistance

This brief reports on project aimed towards breeding sweetpotato varieties with high level of virus resistance. Additionally, ensure the breeding methods are more efficient in producing improved populations with high expression of sweet potato virus disease (SPVD) resistance and quality characteristics desired by farmers and consumers. briefly selected SPVD resistant …
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Genetic diversity in sweetpotato [Ipomoea batatas (L.) Lam.] in relationship to geographic sources as assessed with RAPD markers

Available evidence shows that sweetpotato originated from either Central or South American lowlands with subsequent dispersal to North America, Europe, Africa, Asia and the pacific islands. A total of 71 polymorphic RAPD molecular markers were used to assess the genetic relationships amongst 74 sweetpotato varieties originating from a total of …
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Identification of quantitative trait loci for dry-matter, starch, and b-carotene content in sweetpotato

Development of orange-fleshed sweetpotatoes (OFSP) is desired for the improvement of the food supply and nutritional status of millions of people in developing countries, particularly in Sub-Saharan Africa. However, sweetpotato [Ipomoea batatas (L.) Lam] breeding is challenging due to its genetic complexity, and marker-assisted breeding tools are needed to facilitate …
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Development of a genetic linkage map and identification of homologous linkage groups in sweetpotato using multiple-dose AFLP markers

Sweetpotato genomic research is minimal compared to most other major crops despite its worldwide importance as a food crop. The development of a genetic linkage map in sweetpotato will provide valuable information about the genomic organization of this important species that can be used by breeders to accelerate the introgression …
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Identifying a Randomly Amplified Polymorphic DNA (RAPD) Marker Linked to a Gene for Root-knot Nematode Resistance in Sweetpotato

The inheritance of resistance to root-knot nematode race 3 [Meloidogyne incognita (Kofoid & White) Chitwood] in sweetpotato [Ipomoea batatas (L.) Lam.] was studied in 71 progenies of the F1 single-cross population produced from the cross of resistant parent ‘Regal’ and susceptible parent ‘Vardaman’. The distribution frequency of the progenies based …
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SASHA Brief: Breeding in Africa for Africa

Traditionally, sweetpotato breeding programs have taken a long time, 7 to 8 years, to produce a new variety. Frequently those new varieties do not suit the various geographic areas and the preferences of diverse farmers and consumers within a country. This flyer explains the work done by the Sweetpotato Action for Security …
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