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Cassava cultivars often have poor resistance to biotic stresses and lack good quality traits. Wild species of cultivated crops have frequently been used as an important source of genetic diversity. Cassava breeders are becoming increasingly interested in incorporating genes of wild relatives. In ...


Ojulong, HLabuschangne, M.Herselman, L.Fregene, Martin A.[Introgression of genes for dry matter content from wild cassava species]Introgression of genes for dry matter content from wild cassava species

During recent decennia, new commercial products have appeared on the market as alternatives to common fertilizers. While some of these products are based on well-established technologies, such as rhizobium inoculation, others have not been subjected to scientific scrutiny. During 3 years, we eval...


Jefwa, J.M.Pypers, PieterJemo, M.Thuita, Moses N.Mutegi, E.Laditi, M.A.Faye, A.Kavoo, A.Munyahali, W.Herselman, L.Atieno, M.Okalebo, J.R.Yusuf, A.Ibrahim, A.Ndung’u-Magiroi, K.W.Asrat, A.Muletta, D.Ncho, C.Kamaa, M.Lesueur, Didier[Do commercial biological and chemical products increase crop yields and economic returns under smallholder farmer conditions?]Do commercial biological and chemical products increase crop yields and economic returns under smallholder farmer conditions?

Common bacterial blight (CBB) caused by Xanthomonas axonopodis pv. phaseoli is an important seed-borne disease of dry beans in South Africa. Development of resistant cultivars is considered the best control measurement for the disease. Backcross breeding was used to improve BB resistance in the...


Fourie, D.Herselman, L.Mienie, C.[Improvement of common bacterial blight resistance in South African dry bean cultiver teebus]Improvement of common bacterial blight resistance in South African dry bean cultiver teebus

The cassava breeding scheme currently used is long, because initial stages concentrate mainly on improving yield, with root quality selection following later. To shorten the scheme, yield and root quality should be selected simultaneously, starting at the seedling nursery. In this study, a nurser...


Ojulong, HFLabuschagne, M.T.Herselman, L.Fregene, Martin A.[Yield traits as selection indices in seedling populations of cassava]Yield traits as selection indices in seedling populations of cassava

Inbreeding of predominantly cross-pollinating crops is expected to result in the generation of progeny with reduced fitness and/or progeny with improved phenotypes. However, this effect is not well documented in cassava (Manihot esculenta Crantz). In this study, S1 progeny from six cassava genoty...


Kawuki, Robert S.Nuwamanya, E.Labuschagne, M.T.Herselman, L.Ferguson, Morag E.[Segregation of selected agronomic traits in six S1 cassava families]Segregation of selected agronomic traits in six S1 cassava families

Cassava brown streak disease (CBSD) is an economically important virus disease causing significant losses to cassava root yield and quality in east, central and southern Africa. Breeding for resistance in cassava requires an understanding of the underlying genetic control of CBSD resistance. Sour...


Kulembeka, H.P.Ferguson, M.Herselman, L.Kanju, E.Mkamilo, G.S.Masumba, E.Fregene, Martin A.Labuschagne, M.T.[Diallel analysis of field resistance to brown streak disease in cassava (Manihot esculenta Crantz) landraces from Tanzania]Diallel analysis of field resistance to brown streak disease in cassava (Manihot esculenta Crantz) landraces from Tanzania

Studies to quantify genetic variation in cassava germplasm, available within the national breeding programmes in Africa, have been limited. Here, we report on the nature and extent of genetic variation that exists within 1401 cassava varieties from seven countries: Tanzania (270 genotypes); Ugand...


Kawuki, Robert S.Herselman, L.Labuschagne, M.T.Nzuki, I.Ralimanana, I.Bidiaka, M.Kanyange, M.C.Gashaka, G.Masumba, E.Mkamilo, G.S.Gethi, J.Wanjala, B.W.Zacarias, A.Madabula, F.Ferguson, M.[Genetic diversity of cassava (Manihot esculenta Crantz) landraces and cultivars from southern, eastern and central Africa]Genetic diversity of cassava (Manihot esculenta Crantz) landraces and cultivars from southern, eastern and central Africa

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