Traditional Rice Varieties
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Late nitrogen application enhances spikelet number in indica hybrid rice (Oryza sativa L.)
ABSTRACT To increase rice yield potential, field experiments were conducted in farmers’ paddies in 2011 and 2012 to evaluate the effects of different nitrogen applications on the yield and panicle components of three typical indica hybrid rice varieties in Sichuan Province. The number of grains per panicle resulting from late nitrogen application (LA) was
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-04
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2. Agriculture itinérante sur brûlis (AIB) et plantes cultivées sur le haut Maroni: étude comparée chez les Aluku et les Wayana en Guyane française
Abstract In the late 18th century, Aluku Maroons, descendants of rebel slaves from Dutch plantations and Wayana Indians, fleeing from Brazilian slave hunters met on the upper Maroni in French Guiana. They shared the river and several techniques of subsistence, including slash and burn agriculture, and cultived plants. However our study shows that ancestor wo
Bol. Mus. Para. Emílio Goeldi. Ciênc. hum.. Publicado em: 2016-08
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3. Characterization and use of diazotrophic bacteria isolated from different rice cultivars originated from Maranhão State. / Caracterização e uso de bactérias diazotróficas isoladas de diferentes cultivares de arroz originárias do estado do Maranhão.
Several works have shown that rice crop can benefit from the association with diazotrophic bacteria. However, the biological nitrogen fixation (BNF) in rice is dependent of a complex interaction among the plants, microorganisms and the ecosystem. The general objective of this work was to evaluate the contribution of BNF in varieties of rice originated from t
Publicado em: 2008
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4. Acúmulo e remobilização de NO3 - e eficiência de uso de nitrogênio em variedades tradicional e melhorada de arroz (Oryza sativa L.). / Accumulation and remobilization of NO3 - and efficiency in the use of nitrogen in traditional and improved varieties of rice (Oryza sativa L.).
The dynamics of accumulation and remobilization of NO3 -related protein content of the grains was studied in two varieties of rice, Piauí (traditional state of Maranhão) and IAC- 47 (enhanced by research institutions). The experiment was conducted in a greenhouse of UFRuralRJ in the period August 2006 to February 2007, with a completely randomized design w
Publicado em: 2008
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5. Genetic diversity analysis of Cuban traditional rice (Oryza sativa L.) varieties based on microsatellite markers
Microsatellite polymorphism was studied in a sample of 39 traditional rice (Oryza sativa L.) varieties and 11 improved varieties widely planted in Cuba. The study was aimed at assessing the extent of genetic variation in traditional and improved varieties and to establish their genetic relationship for breeding purposes. Heterozygosity was analyzed at each m
Genetics and Molecular Biology. Publicado em: 2007
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6. Absorção, assimilação e remobilização de nitrogênio em arroz, sob nutrição nítrica. Avaliação da expressão gênica diferencial. / Nitrogen uptake, assimilation and remobilization in rice under supply of nitrate. Evaluation of differential genic expression
O arroz é um dos mais importantes cereais para o homem, porque é fonte primária na alimentação de mais da metade da população do mundo. As plantas necessitam de nitrogênio para seu desenvolvimento, sendo este presente em solos aerados, na forma de nitrato. Em função do desgaste das áreas cultivadas, tem sido intensificada a utilização de fertili
Publicado em: 2007
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7. Determination of genetic variability of traditional varieties of Brazilian rice using microsatellite markers
The rice (Oryza sativa) breeding program of the Rice and Bean research center of the Brazilian agricultural company Empresa Brasileira de Pesquisa Agropecuária (Embrapa) is well established and provides new cultivars every year to attend the demand for improved high yielding varieties with tolerance to biotic and abiotic stresses. However, the elite genitor
Genetics and Molecular Biology. Publicado em: 2006
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8. Eficiência nutricional de fontes de fósforo com solubilidade variável em água em cultivares de arroz (Oryza sativa L.) / Nutritional effectiveness of phosphorus sources varying in water solubility for cultivars of upland rice (Oryza sativa L.)
Cultivars of upland rice may vary in terms of absorption and utilization of phosphorus in soils deficient in this nutrient. Breeding is generally performed in optimal conditions of soil fertility leading to the possibility that new cultivars decrease their condition to absorb and utilize P. The agronomic effectiveness of P sources is related to many aspects,
Publicado em: 2006
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9. Genetic analysis of traditional and evolved Basmati and non-Basmati rice varieties by using fluorescence-based ISSR-PCR and SSR markers
The objective of the present study was to make use of efficient molecular marker systems to reveal genetic relationships in traditional and evolved Basmati (EB) and semidwarf non-Basmati (NB) rice varieties. A subset of three rice groups was analyzed by using 19 simple sequence repeat (SSR) loci and 12 inter-SSR-PCR primers. A total of 70 SSR alleles and 481
The National Academy of Sciences.
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10. Influence of Different Cultivars on Populations of Ammonia-Oxidizing Bacteria in the Root Environment of Rice
Comparisons of the activities and diversities of ammonia-oxidizing bacteria (AOB) in the root environment of different cultivars of rice (Oryza sativa L.) indicated marked differences despite identical environmental conditions during growth. Gross nitrification rates obtained by the 15N dilution technique were significantly higher in a modern variety, IR6308
American Society for Microbiology.