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A genetic linkage map of cassava has been constructed with 132 RFLPs, 30 RAPDs, 3 microsatellites, and 3 isoenzyme markers segregating from the heterozygous female parent of an intraspecific cross. The F1 cross was made between ‘TMS 30572’ and ‘CM?2177-2’, elite cassava cultivars from Nigeria and...


Fregene, Martin A.Angel, F.Gómez, R.Rodríguez, F.Chavarriaga Aguirre, PaulRoca, William M.Tohme, Joseph M.Bonierbale, Merideth W.[A molecular genetic map of cassava (Manihot esculenta Crantz)]A molecular genetic map of cassava (Manihot esculenta Crantz)

Summary: Xanthomonas axonopodis pv. manihotis (Xam) is the causative agent of cassava bacterial blight (CBB), a worldwide disease that is particularly destructive in South America and Africa. CBB is controlled essentially through the use of resistant varieties. To develop an appropriate disease m...


Restrepo, S.Duque E., Myriam CristinaTohme, Joseph M.Verdier, Valérie[AFLP fingerprinting : An efficient technique for detecting genetic variation of Xanthomonas axonopodis pv. manihotis]AFLP fingerprinting : An efficient technique for detecting genetic variation of Xanthomonas axonopodis pv. manihotis

Despite the worldwide importance of cultivated cassava (M. esculenta Crantz) its origin and taxonomic relationships with other species in the genus have not been clearly established. We evaluated a representative sample of the crop’s diversity and six wild taxa with AFLPs to estimate genetic rela...


Roa, ACMaya, M.M.Duque E., Myriam CristinaTohme, Joseph M.Allem, ACBonierbale, Merideth W.[AFLP analysis of relationships among cassava and other Manihot species]AFLP analysis of relationships among cassava and other Manihot species

Amplified fragment length polymophism was assessed in 20 land races and nine elite lines of cassava from Africa, resistant and susceptible to the cassava mosaic disease (CMD). Eleven accessions from a representative core collection from Latin America, previously studied by AFLPs, were included as...


Fregene, Martin A.Bernal, A.Duque E., Myriam CristinaDixon, Alfred G.O.Tohme, Joseph M.[AFLP analysis of African cassava (Manihot esculenta Crantz) germplasm resistant to the cassava mosaic disease (CMD)]AFLP analysis of African cassava (Manihot esculenta Crantz) germplasm resistant to the cassava mosaic disease (CMD)

High genotype-dependent variation in friable embryogenic callus (FEC) induction and subsequent somaclonal variation constitute bottlenecks for the application and scaling of genetic transformation (GT) technology to more farmer- and industry-preferred cassava varieties. The understanding and iden...


Brand, AlejandroQuimbaya, MauricioTohme, Joseph M.Chavarriaga-Aguirre, Paul[Arabidopsis LEC1 and LEC2 Orthologous Genes Are Key Regulators of Somatic Embryogenesis in Cassava]Arabidopsis LEC1 and LEC2 Orthologous Genes Are Key Regulators of Somatic Embryogenesis in Cassava

Velásquez, A.M.Fory Sánchez, L.F.Pérez, J.G.Duque, M.Cuasquer, JGallego Sánchez, Gerardo J.Roca, William M.Tohme, Joseph M.Bocanegra, J.L.Torres, L.Villafañe, CLópez, D.Castro, F.Torrijos, P.Moreno, R.[Linea de base para la toma de desiciones en bioseguridad: desarrollo de un modelo para la evaluación de flujo de genes caracterización molecular de la diversidad de yuca usando marcadores SSRs, ESTs, y SNPs]Linea de base para la toma de desiciones en bioseguridad: desarrollo de un modelo para la evaluación de flujo de genes caracterización molecular de la diversidad de yuca usando marcadores SSRs, ESTs, y SNPs

Restrepo M., José M.Ospina, GIHernández, C.Escobar Pérez, Roosevelt H.Tohme, Joseph M.Roca, William M.[Participatory development of low-cost simplified rustic tissue culture for cassava]Participatory development of low-cost simplified rustic tissue culture for cassava

Bellotti, Anthony C.Roca, William M.Tohme, Joseph M.Chavarriaga Aguirre, PaulEscobar Pérez, Roosevelt H.Herrera Fernández, C.J.[Biotecnología para el manejo de plagas en la producción de semilla limpia]Biotecnología para el manejo de plagas en la producción de semilla limpia

Fregene, Martin A.Tohme, Joseph M.Roca, William M.Chavarriaga Aguirre, PaulEscobar Pérez, Roosevelt H.Ceballos, H.[Biotecnología para la yuca]Biotecnología para la yuca

Since 1998, cassava has outperformed all the world’s major crops in relative production increase. It is also recognized as being resilient to climate change. Its global average yield, however, is only 13 Mt/ha, compared to a potential of at least 65 Mt/ha, partly due to the impact of pests and di...


Fauquet, Claude M.Tohme, Joseph M.[GCP21: a global cassava partnership for the 21st century]GCP21: a global cassava partnership for the 21st century

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