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Previous studies conducted on limited number of accessions have reported very low genetic variation in African rice (Oryza glaberrima Steud.) as compared to its wild progenitor (O. barthii A. Chev.) and to Asian rice (O. sativa L.). Here, we characterized a large collection of African rice and co...


Ndjiondjop, M.N.Alachiotis, N.Pavlidis, P.Goungoulou, A.Kpeki, S.B.Zhao, D.Semagn, K.[Comparisons of molecular diversity indices, selective sweeps and population structure of African rice with its wild progenitor and Asian rice]Comparisons of molecular diversity indices, selective sweeps and population structure of African rice with its wild progenitor and Asian rice

Improving agricultural productivity to keep pace with the fast-growing food demand is a huge challenge for sub-Saharan Africa (SSA). Fertilizer is a powerful productivity-enhancing input; nevertheless, farmers of SSA use only 5–9 kg ha−1 of fertilizer, which is ten times lesser than Latin America...


Bado, V.B.Djaman, K.Mel, V.C.[Developing fertilizer recommendations for rice in Sub-Saharan Africa, achievements and opportunities]Developing fertilizer recommendations for rice in Sub-Saharan Africa, achievements and opportunities

Using interspecific crosses involving Oryza glaberrima Steud. as donor and O. sativa L. as recurrent parents, rice breeders at the Africa Rice Center developed several 'New Rice for Africa (NERICA)' improved varieties. A smaller number of interspecific and intraspecific varieties have also been r...


Ndjiondjop, M.N.Semagn, K.Sow, M.Manneh, B.Gouda, A.C.Kpeki, S.B.Pegalepo, E.Wambugu, P.Sié, M.Warburton, M.L.[Assessment of Genetic Variation and Population Structure of Diverse Rice Genotypes Adapted to Lowland and Upland Ecologies in Africa Using SNPs]Assessment of Genetic Variation and Population Structure of Diverse Rice Genotypes Adapted to Lowland and Upland Ecologies in Africa Using SNPs

Species misclassification (misidentification) and handling errors have been frequently reported in various plant species conserved at diverse gene banks, which could restrict use of germplasm for correct purpose. The objectives of the present study were to (i) determine the extent of genotyping e...


Ndjiondjop, M.N.Semagn, K.Zhang, J.Gouda, A.C.Kpeki, S.B.Goungoulou, A.Wambugu, P.Dramé, K.N.Bimpong, I.K.Zhao, D.[Development of species diagnostic SNP markers for quality control genotyping in four rice (Oryza L.) species]Development of species diagnostic SNP markers for quality control genotyping in four rice (Oryza L.) species

Growing rice in saline soils by minimizing damage on growth and yield remains a challenge. We conducted field experiments in the Africa Rice research field located in the Senegal River delta (16° 11ʹ N, 16° 15ʹ W) to study the effects of three management options of fertilization e.g. (i) nitrogen...


Mel, V.C.Bado, V.B.Ndiaye, S.Djaman, K.Nati, D.A.B.Manneh, B.Futakuchi, K.[Suitable management options to improve the productivity of rice cultivars under salinity stress]Suitable management options to improve the productivity of rice cultivars under salinity stress

Drought is a major constraint to rice (Oryza spp.) production in sub-Saharan Africa. Oryza glaberrima Steud., the cultivated rice species that originated from West Africa, is well-adapted to its growing ecologies. This study was initiated to identify promising O. glaberrima accessions tolerant to...


Shaibu, A.A.Uguru, M.I.Sow, M.Maji, A.T.Ndjiondjop, M.N.Venuprasad, R.[Screening African Rice (Oryza glaberrima) for Tolerance to Abiotic Stresses: II. Lowland Drought]Screening African Rice (Oryza glaberrima) for Tolerance to Abiotic Stresses: II. Lowland Drought

Rice is one of the most consumed crop around the globe and its production needs to be increased in a context of climate change and water scarcity. Rice roots, as most land plants, can establish symbiotic association with arbuscular mycorrhizal fungi (AMF). Rice has emerged, in the past decade, as...


Mbodj, D.Effa-Effa, B.Kane, A.Manneh, B.Gantet, P.Laplaze, L.Diedhiou, A.Grondin, A.[Arbuscular mycorrhizal symbiosis in rice: Establishment, environmental control and impact on plant growth and resistance to abiotic stresses]Arbuscular mycorrhizal symbiosis in rice: Establishment, environmental control and impact on plant growth and resistance to abiotic stresses

The African rice gall midge, Orseolia oryzivora Harris and Gagné has become one of the major biotic constraints to rice production in Nigeria. A survey of gall midge distribution in Nigeria showed that the pest was common in the savannah and forest zones on rice grown under lowland ecologies. End...


Ukwungwu, M.N.Joshi, R.C.[Distribution of the African rice gall midge, Orseolia oryzivora Harris and Gagne and its parasitoids in Nigeria]Distribution of the African rice gall midge, Orseolia oryzivora Harris and Gagne and its parasitoids in Nigeria

Drought is a noteworthy cause of low agricultural profitability and of crop production vulnerability, yet in numerous countries of Africa little to no consideration has been paid to readiness for drought calamity, particularly to spatial evaluation and indicators of drought occurrence. In this st...


Dossou-Yovo, E.R.Zwart, Sander J.Kouyate, A.Ouédraogo, I.Bakare, O.[Predictors of drought in inland valley landscapes and enabling factors for rice farmers’ mitigation measures in the Sudan-Sahel Zone]Predictors of drought in inland valley landscapes and enabling factors for rice farmers’ mitigation measures in the Sudan-Sahel Zone

Poor water management and high nitrogen (N) losses are the key problems faced by rice farmers under rainfed inland valley systems. There is a need to evaluate different N fertilizers so as to identify one that could withstand these problems. The performance of polyolefin-coated urea (POCU) was th...


Oluwarotimi, O.Fashola, O.O.Hayashi, K.Wakatsuki, T.[Effect of water management and polyolefin-coated urea on growth and nitrogen uptake of indica rice]Effect of water management and polyolefin-coated urea on growth and nitrogen uptake of indica rice

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