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| Registros recuperados: 816 | |
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| Wailes, Eric J.; Chavez, Eddie C.. |
| The Arkansas Global Rice Model is based on a multi-country statistical simulation and econometric framework. The model is disaggregated by five world regions: Africa, the Americas, Asia, Europe, and Oceania. Each region includes country models which have a supply sector, a demand sector, a trade, stocks and price linkage equations. All equations used in this model are estimated using econometric procedures or identities. Estimates are based upon a set of explanatory variables including exogenous macroeconomic factors such as income, population, inflation rate, technology development, and especially, government determined policy variables which reflect the various mechanisms by which countries intervene in their rice sector economy. Individual country... |
| Tipo: Report |
Palavras-chave: Rice; Trade model; Policy; Agricultural and Food Policy; Research and Development/Tech Change/Emerging Technologies; CO2; C61; F11; F14; Q17; Q18. |
| Ano: 2011 |
URL: http://purl.umn.edu/102650 |
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| Jose Marion Filho, Pascoal; Eich Einloft, Neci. |
| This article evaluates the competitiveness of irrigated rice produced in Brazil, Uruguay and Argentina, the main partners in the commerce of this cereal. The rice production costs, the agricultural policies, the exchange rates and the common external tariff (CET) in the three countries are analyzed comparatively. The research shows that the rice produced in Argentina is the most competitive of the region, due to the lower production costs per hectare and per bag of 50 kg, followed by Uruguay and Brazil. Regarding the agricultural policy of each country, in Brazil policies are mainly oriented towards rural credit and short term actions, with reduced subsidies for large scale farmers and protection of family agriculture. In Uruguay, the agricultural policies... |
| Tipo: Journal Article |
Palavras-chave: Rice; Competitiveness; Agricultural policy.. |
| Ano: 2008 |
URL: http://purl.umn.edu/48436 |
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| Xing,Shaochen; Cai,Yuhong; Zhou,Kaida. |
| A triploid (2n = 3x = 36) rice plant was obtained by screening a twin seedling population in which each seed germinated to two or three sprouts that were then crossed with diploid plants. One diploid plant was chosen among the various F1 progenies and developed into an F2 population via self-pollination. Compared with the control variety Shanyou 63, this F2 population had a stable agronomical performance in field trials, as confirmed by the F-test. The stability of the F2 population was further substantiated by molecular analysis with simple sequence repeat markers. Specifically, of 160 markers assayed, 37 (covering all 12 chromosomes) were polymorphic between the parental lines. Testing the F1 hybrid individually with these markers showed that each PCR... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: F-test; Polyploidy; Rice; SSR marker; Stability. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200020 |
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| MACIEL, D. N.; FRAGOSO, D. de B.; BARRIGOSSI, J. A. F.; LACERDA, M. C.. |
| The resistance of rice stalk stink bug, Tibraca limbativentris Stal 1860 (Hemiptera: Pentatomidae) to five insecticides was investigated in the present study. The tested insecticides were bifenthrin, carbosulfan, etophenprox, λ-cyhalothrin, and thiametoxam. The five field-collected populations of rice stalk stink bugs from Luis Alves-GO, Flores de Goiás-GO, Formoso do Araguaia-TO, Lagoa da Confusão-TO and Itajaí-SC were investigated in relation the insecticide resistance occurrence. A further Santo Antônio de Goiás population, from natural environment was used as standard-population of susceptibility. Insects of these populations were submitted to discriminating concentrations (LC95s) with objective to determine the frequences of individuals... |
| Tipo: Artigo de periódico |
Palavras-chave: Rice stalk stink bug; Inseto; Percevejo; Tibraca Limbativentris; Arroz Inundado; Rice; Insecta. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1132304 |
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| Menguer,Paloma Koprovski; Sperotto,Raul Antonio; Ricachenevsky,Felipe Klein. |
| Abstract Oryza sativa, the common cultivated rice, is one of the most important crops for human consumption, but production is increasingly threatened by abiotic stresses. Although many efforts have resulted in breeding rice cultivars that are relatively tolerant to their local environments, climate changes and population increase are expected to soon call for new, fast generation of stress tolerant rice germplasm, and current within-species rice diversity might not be enough to overcome such needs. The Oryza genus contains other 23 wild species, with only Oryza glaberrima being also domesticated. Rice domestication was performed with a narrow genetic diversity, and the other Oryza species are a virtually untapped genetic resource for rice stress tolerance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza; Rice; Wild species; Abiotic stress; Domestication. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000200238 |
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| Registros recuperados: 816 | |
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