Resultados de búsqueda - ZENIT~

Assessment of farmer preferences for cattle traits in smallholder cattle production systems of Kenya and Ethiopia por Ouma, Emily A., Abdulai, A., Drucker, Adam G., Obare, G.A.

“…However, there are tendencies for genetic improvement programs to focus on single, market driven traits such as milk or meat production in isolation of environmental constraints and broader livestock system functions which cattle perform in developing countries. …”
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Agricultural water use and management in arid and semiarid areas: Current situation and measures for improvement por Dehghanisanij, H., Oweis, Theib Y., Qureshi, Asad Sarwar

“…Conventional water-management and cropping pattern guidelines, designed to maximize yield per unit area, need to be revised for achieving maximum water productivity. …”
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The SmartAG Partner: CCAFS East Africa Quarterly Newsletter, April - June 2014 por CGIAR Research Program on Climate Change, Agriculture and Food Security

“…From Ethiopia – CCAFS study sites - researchers have found that genetic erosion threatens resilience of the Ethiopian Boran cattle. …”
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Analysis of threats to South American flora and its implications for conservation por Ramírez Villegas, Julián Armando, Jarvis, Andy, Trouval, Jerry

“…South America houses a significant proportion of the world's plant diversity and therefore merits conservation attention. However, ongoing habitat fragmentation, degradation and destruction of natural habitats threaten biodiversity. …”
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Giving new sorghum variety options to resource-poor farmers in Nicaragua through participatory varietal selection por Trouche, G., Brocke, Kirsten vom, Aguirre Acuña, S., Chow, Z

“…Furthermore, by exploring wide genetic diversity, it was possible to release several farmer-preferred and high-performing varieties within a fairly short period.…”
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Expression and inheritance of hypersensitive resistance to rice hoja blanca virus mediated by the viral nucleocapsid protein gene in transgenic rice por Lentini, Zaida, Lozano Potes, Iván, Tabares Z., Eddie, Fory Sánchez, L.F., Domínguez, J., Cuervo Ibáñez, Maritza, Calvert, Lee A.

“…These transgenic rice lines could become a new genetic resource in developing RHBV-resistant cultivars.…”
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Cloning of the complete DNA genomes of four bean-infecting geminiviruses and determining their infectivity by electric discharge particle acceleration por Gilbertson, R.L., Faria, J.C. de, Hanson, SF, Morales, Francisco José, Ahlquist, P.G., Maxwell, D.P., Russell, D.R.

“…Particle acceleration will facilitate genetic analysis of bean-infecting geminiviruses and may allow for the efficient introduction of viral nucleic acids or virions of other viruses into hosts that are refractory to mechanical transmission.…”
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Mapping QTL for climbing ability and component traits in common bean (Phaseolus vulgaris L.) por Checa Coral, Oscar E., Blair, Matthew W.

“…QTL were identified for plant height, internode length and number of branches per plant on a genetic map covering all common bean linkage groups with a total length of 1,175 cM. …”
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Reproductive performance of Gyr cows: The effect of weaning age of calves and pospartum energy intake por Moore, C.P., Rocha, Carlos Magno Campos da

“…The results show that Gyr cattle are genetically capable of responding reproductively to improve nutrition and reduced lactation stress achieved through early weaning or controlled nursing.…”
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Contribución de los forrajes mejorados a la productividad ganadera en sistemas de doble propósito por Argel M., Pedro J.

“…Mulato, an apomictic hybrid of Brachiaria has resulted in increased milk and beef productivity in dual purpose farms due mainly to high production of good quality forage that permits a higher stocking rate per unit area. Similarly, shrub legumes such as Cratylia argentea can substitute for high cost supplements such as poultry manure during the dry season in dual purpose farms. …”
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Evaluación de fungicidas para el control del complejo fungoso Drechslera spp., Phoma spp., Sphacelia sp., Epiccocum spp. (Cerebella spp.) en inflorescencias de Brachiaria brizantha... por Pineda López, Benjamín, Balcázar, María del Socorro, Rivera, A.L.

“…More than 700 accesions of Brachiaria spp. are conserved in small quantities of seeds) in the Germoplasm Bank at CIAT s Genetic Resources Unit (GRU. These have been obtained by donations of other banks, collections of national and international seeds or collected in the sites of origin. …”
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Ex ante impact assessment of disease control technologies: The case of vector-borne infections in Africa por Perry, Brian D., Kruska, Russell L., Medley, G.F., Mukhebi, A.W., O'Callaghan, C.J., Peter, T.F., Reid, Robin S., Williams, T.

“…The institute conducts research in the areas of ruminant genetics, ruminant health, feed resources, crop-livestock systems and strengthening national agricultural systems of the developing world. …”
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Milk production, milk composition and body weight change of crossbred dairy cows in urban and peri-urban dairy production systems in Ethiopia por Mekasha, Yoseph, Tegegne, Azage, Yami, A., Umunna, N.N.

“…It is therefore concluded that the various environmental factors, mainly nutrition, and genetic factors, possibly inbreeding depression, should be improved in order to improve milk production from intensively managed urban and peri-urban dairy farms…”
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Applicability of near-infrared reflectance spectroscopy (NIRS) for determination of crude protein content in cowpea (Vigna unguiculata) leaves por Towett, Erick K., Alex, M., Shepherd, Keith D., Polreich, S., Aynekulu, Ermias, Maass, Brigitte L.

“…The current model is applicable in predicting the CP content of young cowpea leaves for human nutrition from different agro‐ecological zones and genetic materials, as cowpea leaves are one of the popular vegetables in the region.…”
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Do faba bean (Vicia faba L.) accessions from environments with contrasting seasonal moisture availabilities differ in stomatal characteristics and related traits? por Khazaei H, Street K, Santanen A, Bari, A., Stoddard FL

“…Stomatal density and stomatal area per unit area of leaflet were negatively correlated with gas exchange parameters and positively correlated with intrinsic water use efficiency. …”
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Alternatives to slash & burn: a global strategy: special project for presentation to the global steering group (GSG): first phase January 1993-December 1997 por International Center for Tropical Agriculture

“…Tropical deforestation is responsible for 18 percent of current global warming, for most of the decimation of plant and animal genetic diversity, and for threatening the stability of many watersheds. …”
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Status of the draft potato ontology. por Simon, R., Bonierbale, Merideth W.

“…The case of potato presents several opportunities to test and evaluate the different uses of ontologies: a) potato has more than 100 tuber-bearing wild relatives, b) the potato genome and that of its sister species, tomato, have recently been sequenced, and c) conserved orthologous set (COS) gene sequences markers have been mapped in the physical and genetic map of potato and tomato. On the other hand potential constraints are: a) potato is outbreeding and has a high level of diversity at genotype and phenotype level; and b) predictivity of transferring knowledge between species has been weak in the past. …”
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Identification of relevant non-target organisms exposed to weevil-resistant Bt sweetpotato in Uganda por Rukarwa, R., Mukasa, S., Odongo, B., Ssemakula, G.N., Ghislain, M.

“…Like any other pest control technologies, genetically engineered crops expressing insecticidal proteins need to be evaluated to assess potential negative effects on non-target organisms that provide important services to the ecosystem. …”
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Shared binding sites for the Bacillus thuringiensis proteins Cry3Bb, Cry3Ca and Cry7Aa in the African sweetpotato pest Cylas puncticollis (Brentidae) por Hernández Martinez, P., Vera Velasco, N.M., Martínez Solis, M., Ghislain, M., Ferre, J., Escriche, B.

“…The aim of the present study was to determine whether Cry3Bb, Cry3Ca, and Cry7Aa proteins have shared binding sites in Cylas puncticollis to orient the pest resistance strategy by genetic transformation. Interestingly, processing of the 129-kDa Cry7Aa protoxin using commercial trypsin or chymotrypsin rendered two fragments of about 70 kDa and 65 kDa. …”
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Genotype by environment effects on potato mini-tuber seed production in an aeroponics system por Mateus-Rodriguez, J., Haan, Stef de, Rodríguez Delfin, A.

“…“Days to tuber set” was influenced by genetic responses, temperature and greenhouse Photosynthetically Active Radiation intensity. …”
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