Resultados de búsqueda - Genes Africa.

Molecular evidence confirms occurrence of Rhipicephalus microplus Clade A in Kenya and sub-Saharan Africa por Kanduma, Esther G., Emery, D., Githaka, Naftaly W., Nguu, E.K., Bishop, Richard P., Šlapeta, J.

“…Conclusions These findings confirm the presence of R. microplus in Kenya and suggest that R. microplus Clade A is prevalent in cattle in sub-Saharan Africa. These and other recent findings of widespread occurrence of R. microplus in Africa provide a strong justification for urgent surveillance to determine and monitor the spread of R. microplus and vector competence of Boophilus ticks for B. bovis in Africa, with the ultimate goal of strategic control.…”
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Enhancing resistance against African weevils through development of transgenic sweetpotato cultivars (Ipomoea batatas (L.) Lam.) expressing cry7Aa1, cry3Ca1 and ET33-34 genes. por Manrique Trujillo, S., Wamalwa, N.L., Díaz, D., Reano, R., Tovar, J.C., Prentice, K., Ormachea, M., Kreuze, Jan F., Machuka, J., Ghislain, M.

“…Sweetpotato (Ipomoea batatas) is one of the most important food crops in tropical and subtropical countries. In Sub-Saharan Africa, sweetpotato is mainly produced for consumption and as a source of income by resource-poor farmers. …”
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A USA Africa collaborative strategy for identifying, characterising and developing maize germplasm with resistance to aflatoxin contamination por Menkir, A., Brown, R.L., Bandyopadhyay, Ranajit, Chen, Z.Y., Cleveland, T.E.

“…Following confirmation tests in the laboratory, lines with consistently low aflatoxin levels will be inoculated with A. flavus in the field in Nigeria to identify lines resistant to strains specific to both US and West Africa. Maize inbred lines with desirable agronomic traits and low levels of aflatoxin in the field would be released as sources of genes for resistance to aflatoxin production.…”
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Towards a rational use of African rice (Oryza glaberrima Steud.) for breeding in Sub-Saharan Africa por Sie, M., Sanni, K., Futakuchi, K., Manneh, B., Mande, S., Vodouhe, R.S., Dogbe, S., Drame, K., Ogunbayo, A., Ndjiondjop, Marie-Noel, Traoré, K.

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Genetic analysis of thrips resistance in cowpea (Vigna unguiculata [L.] Walp.) por Oladejo, A.S., Boukar, O., Fatokun, C.A., Obisesan, I.O.

“…Flower bud thrips, Megalurothrips sjostedti is the most severe field pest of cowpea that causes massive flower abortion which eventually results to substantial yield reduction in Africa. There is paucity of information on the mode of gene actions controlling inheritance of resistance to flower bud thrips in cowpea in the literature. …”
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Genetic Identity, Diversity, and Population Structure of the International Potato Center's Sweetpotato (I. batatas) Germplasm Collection por Anglin, Noelle L., Robles, R., Rossel, G., Alagon, R., Panta, A., Jarret, Robert L., Manrique, N., Ellis, David

“…Population structure analysis demonstrated support for four ancestral populations with many of the accessions having lower levels of gene flow from the other populations. This was especially true of germplasm derived from Peru, Ecuador, and Africa. …”
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Genomic profiles of Pyricularia oryzae in Sub-Saharan Africa: exploring population differences and their evolutionary implications in the region por Onaga, G., Suktrakul, W., Wanjiku, M., Quibod, I.L., Domelevo Entfellner, Jean-Baka, Bigirimana, J., Habarugira, G., Murori, R., Asea, G., Tella, H.E., Amagnide, G.A.G.Y., Zenna, N., Jantasuriyarat, C., Ismail, A.M., Oliva, R.

“…The introduction of <i>P. oryzae</i> into Africa occurred mainly from China in the late 19th century, initially in West Africa (WA; Mali and Burkina Faso), and subsequently in Uganda and Madagascar during the early 20th century, before extending to the wider African region, with subsequent repeated introductions. …”
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Incidence of RNA viruses infecting taro and tannia in East Africa and molecular characterisation of dasheen mosaic virusisolates por Kidanemariam, Dawit B., Sukal, A.C., Abraham, Adane D., Njuguna, Joyce N., Stomeo, Francesca, Dale, J.L., James, A.P., Harding, R.M.

“…Nucleotide substitution ratio analysis revealed that all the DsMV genes are under strong negative selection pressure.…”
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Genetic relationships among resilience, fertility, and milk yield in dairy cattle performing in sub-Saharan Africa por Oloo, Richard Dooso

“…Despite the relevance of dairy production in the fight against food insecurity in sub-Saharan Africa (SSA), the negative effects of climate change and general changes in the production environment pose tremendous challenges to its profitability. …”
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Genome of the African cassava whitefly Bemisia tabaci and distribution and genetic diversity of cassava-colonizing whiteflies in Africa por Chen, W., Wosula, Everlyne N., Hasegawa, D.K., Casinga, C., Shirima, R.R., Fiaboe, K.K.M., Hanna, R., Fosto, A., Goergen, Georg E., Tamò, Manuele, Mahuku, George S., Murithi, H.M., Tripathi, L., Mware, B., Kumar, P. Lava, Ntawuruhunga, Pheneas, Moyo, C., Yomeni, M., Boahen, S., Edet, M., Awoyale, W., Wintermantel, William M., Ling, K.S., Legg, James P., Fei, Z.

“…Here we report the draft genome of the cassava whitefly B. tabaci Sub-Saharan Africa - East and Central Africa (SSA-ECA), the super-abundant population that has been associated with the rapid spread of viruses causing the pandemics of CMD and CBSD. …”
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Reconstructing the origin and dispersal patterns of village chickens across East Africa: Insights from autosomal markers por Mwacharo, Joram M., Nomura, K., Hanada, H., Amano, T., Han Jianlin, Hanotte, Olivier H.

“…A gradient of admixture for gene pools II and III between the Kenyan coast and Uganda's hinterland (P = 0.001) is observed, while gene pool I is clearly separated from the other two. …”
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New microsatellite markers for Dacryodes edulis (Burseraceae), an indigenous fruit tree species from Central Africa por Rimlinger, Aurore, Marie, Lison, Avana-Tientcheu, Marie Louise, Bouka Dipelet, Ulrich G., Zekraoui, Leila, Cedric, Mariac, Carrière, Stéphanie, Duminil, Jérôme

“…This set of newly developed microsatellite markers will be useful for assessing the genetic diversity and differentiation as well as gene flow patterns of D. edulis in tropical forests from Central Africa.…”
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Genetic characterization of some water yam (Dioscorea alata L.) in West Africa with simple sequence repeats por Obidiegwu, J.E., Asiedu, Robert, Ene-Obong, E.E., Muoneke, C.O., Kolesnikova-Allen, M.

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

“…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); Uganda (268); Kenya (234); Rwanda (184); Democratic Republic of Congo (DRC; 177); Madagascar (186); Mozambique (82). …”
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Prevalence of methicillin resistance in Staphylococcus pseudintermedius isolates from dogs with skin and ear infections in South Africa por Prior, C.D., Moodley, Arshnee, Karama, M., Malahlela, M.N., Leisewitz, A.

“…There is an urgent need for better laboratory diagnosis of MRSP and surveillance of dogs presenting with pyoderma and otitis in South Africa.…”
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Resistance to aflatoxin accumulation in kernels of maize inbreds selected for ear rot resistance in West and Central Africa por Brown, R.L., Chen, Z.Y., Menkir, A., Cleveland, T.E., Cardwell, K., Kling, J., White, D.G.

“…Thirty-six inbred lines selected in West and Central Africa for moderate to high resistance to maize ear rot under conditions of severe natural infection were screened for resistance to aflatoxin contamination using the previously established kernel screening assay. …”
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Distribution and diversity of emergent Banana bunchy top virus infecting banana and plantain in Cameroon, Central Africa por Ngatat, S., Hanna, R., Doumtsop Fotio, A.R.P., Lienou, J.A., Nanga, S.N., Fotso Kaute, A., Osundahunsi, B., Fiaboe, K., Ndemba, B., Dossa, G.S., Alabi, T., Kumar, P.L.

“…Phylogenetic analysis using complete nucleotide sequences of the BBTV-R and BBTV-S gene aligned Cameroon isolates with the sub-Saharan Africa subgroup of the Pacific-Indian Oceans (PIO) group of BBTV isolates, suggesting a likely virus invasion from neighbouring central African countries where BBTV presence had been reported in the 1980s. …”
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Unveiling stagnant flooding tolerance in lowland NERICAs: genomic insights and breeding prospects por Semwal, Vimal Kumar, Afeez, Shittu, Bhadmus, Olatunde A., Jolayemi, Okanlawon, Ramaiah, Venuprasad

“…This study highlights the potential of lowland NERICAs as a genetic resource and provides QTL, donor lines, molecular resources that form a practical basis for marker-assisted selection and pre-breeding of dual-tolerant rice cultivars adapted to climate-induced flooding scenarios in sub-Saharan Africa.…”
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Climate-resilient seed systems & access and benefit-sharing in Uganda por Otieno, G., Mulumba, John W., Namulondo, B., Halewood, Michael

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Assessment of the virulence spectrum and its association with genetic diversity in Magnaporthe oryzae populations from sub-Saharan Africa por Mutiga, Samuel K., Rotich, F., Ganeshan, V.D., Mwongera, D.T., Mgonja, Emmanuel M., Were, Vincent M., Harvey, Jagger J.W., Zhou, B., Wasilwa, L., Feng, C., Ouédraogo, I., Wang, G.L., Mitchell, T.K., Talbot, N.J., Correll, James C.

“…Principal component analysis showed isolates from East Africa were genetically distinct from those from West Africa. …”
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