Resultados de búsqueda - "Oryza sativa"

Mapping of quantitative trait loci using a doubled-haploid population from the cross of indica and japonica cultivars of rice por Lapitan, Victoria C., Redoña, Edilberto D., Abe, Toshinori, Brar, Darshan S.

“…Improving the cooking and eating quality of grain has always been an important consideration in most rice (Oryza sativaL.) breeding programs. In this study, an established rice doubled‐haploid (DH) population consisting of 219 lines from anther culture of the F1 ofindicavariety PSB Rc10 andjaponicavariety Nipponbare was used to identify the quantitative trait loci (QTL) for amylose content (AC), gel consistency (GC), and gelatinization temperature (GT). …”
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Phenol accumulation in a young humic fraction following anaerobic decomposition of rice crop residues por Olk, D.C., Jimenez, R.R., Moscoso, E., Gapas, P.

“…Soil phenols have been implicated as inhibitors of soil N cycling within many agroecosystems, including irrigated lowland rice (Oryza sativa L.). To quantify the effects of crop management on temporal patterns of phenol accumulation in lowland rice soils, we measured phenol concentrations in two humic fractions at two crop growth stages in each growing season during a 4‐yr field study at the International Rice Research Institute (Philippines). …”
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Yield gap analysis between dry and wet season rice crop grown under high-yielding management conditions por Yang, Woonho, Peng, Shaobing, Laza, Rebecca C., Visperas, Romeo M., Dionisio-Sese, Maribel L.

“…Rice (Oryza sativa L.) grain yield highly varies depending on cropping seasons under the tropical irrigated conditions. …”
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Registration of TIL:455, TIL:514, and TIL:642, three rice germplasm lines containing introgressed sheath blight resistance alleles por Pinson, S. R. M., Oard, J.H., Groth, D., Miller, R., Marchetti, M.A., Shank, A.R., Jia, M.H., Jia, Y., Fjellstrom, R.G., Li, Z.

“…Three rice (Oryza sativa L.) germplasm lines designated as TIL:455 (Reg. …”
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Nitrogen supply in rice-based cropping systems as affected by crop residue management por Thuy, Nguyen Hong, Shan, Yuhua, Bijay-Singh, Wang, Kairong, Cai, Zucong, Yadvinder-Singh, Buresh, Roland J.

“…We examined the in situ use of crop residue as a source of supplemental N for succeeding crops in rice (Oryza sativa L.)‐based cropping systems at three sites during 3 yr. …”
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Development of a novel data mining tool to find cis-elements in rice gene promoter regions por Doi, Koji, Hosaka, Aeni, Nagata, Toshifumi, Satoh, Kouji, Suzuki, Kohji, Mauleon, Ramil, Mendoza, Michael J., Bruskiewich, Richard, Kikuchi, Shoshi

“…Information on more than 35 000 full-length Oryza sativa cDNAs, together with associated microarray gene expression data collected under various treatment conditions, has made it feasible to identify motifs that are conserved in gene promoters and may act as cis-regulatory elements with key roles under the various conditions.We have developed a novel tool that searches for cis-element candidates in the upstream, downstream, or coding regions of differentially regulated genes. …”
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Performance of site-specific nutrient management for irrigated, transplanted rice in Northwest India por Khurana, Harmandeep S., Phillips, Steven B., Bijay-Singh, Dobermann, Achim, Sidhu, Ajmer S., Yadvinder-Singh, Peng, Shaobing

“…Like in other parts of Asia, irrigated, transplanted rice (Oryza sativa L.) yield increases in Punjab, India, have slowed down in recent years. …”
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Grain yield and yield attributes of new plant type and hybrid rice por Yang, Woonho, Peng, Shaobing, Laza, Rebecca C., Visperas, Romeo M., Dionisio-Sese, Maribel L.

“…Development of new plant types (NPTs) and hybrids are two major approaches for improving the yield potential of irrigated rice (Oryza sativa L.). This study was conducted (i) to compare grain yield and yield attributes among three high‐yielding groups of rice, namely indica inbred, indica/indica F1 hybrid, and second‐generation NPT, and (ii) to identify the morphophysiological traits responsible for the yield difference among the three groups. …”
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A large-Effect QTL for grain yield under reproductive-stage drought stress in upland rice por Bernier, Jérôme, Kumar, Arvind, Ramaiah, Venuprasad, Spaner, Dean, Atlin, Gary

“…Genetic control of yield under reproductive‐stage drought stress was studied in a population of 436 random F3–derived lines from a cross between the upland rice (Oryza sativa L.) cultivars Vandana and Way Rarem. Screening was conducted under upland conditions at IRRI during the dry seasons of 2005 and 2006. …”
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Simulation of nitrogen balance in rice-wheat systems of the Indo-Gangetic plains por Pathak, H., Li, C., Wassmann, R., Ladha, J.K.

“…The Denitrification and Decomposition (DNDC) model was evaluated for its ability to simulate N dynamics and balance in the rice (Oryza sativa L.)–wheat (Triticum aestivum L.) cropping systems in the Indo‐Gangetic Plains with various N and water management practices. …”
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Seedling nutrient status before submergence affects survival after submergence in rice por Ella, Evangelina S., Ismail, Abdelbagi M.

“…Vast rainfed lowland areas in Asia periodically experience flash floods that adversely affect survival and productivity of rice (Oryza sativa L.). Progress has been made in developing more tolerant germplasm, but fewer efforts have been devoted to identifying proper management options. …”
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Identification of quantitative trait loci for delta 13c and productivity in irrigated lowland rice por Laza, Ma. R., Kondo, M., Ideta, O., Barlaan, E., Imbe, T.

“…Stable carbon isotope ratio (δ13C) in plants has been suggested as a useful indicator for cumulative Ci/Ca signature in a leaf, water use efficiency, and crop productivity, and is known to have genotypic variation in rice (Oryza sativa L.). We conducted a field study to identify quantitative trait loci (QTLs) for δ13C and other related leaf traits, such as leaf N, specific leaf area, and SPAD value, using recombinant inbred lines derived from an indica × japonica cross grown under flooded conditions. …”
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Soil solution sampling for organic acids in rice paddy soils por Angeles, Olivyn R., Johnson, Sarah E., Buresh, Roland J.

“…Low molecular weight organic acids (OA), which are intermediates in the anaerobic decomposition of straw incorporated into submerged soils, have been implicated in causing toxicity to young rice (Oryza sativa L.) seedlings. The objective of this study was to develop a method for measuring OA in soil solution in field and greenhouse studies. …”
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Influence of different Oryza cultivars on expression of nifH gene pools in roots of rice por Knauth, Stefan, Hurek, Thomas, Brar, Darshan, Reinhold-Hurek, Barbara

“…Cultivation‐independent studies suggest that roots of rice (Oryza sativa) are colonized by a diverse community of nitrogen‐fixing bacteria. …”
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Leaf color chart for managing nitrogen fertilizer in lowland rice in Bangladesh por Alam, M. Murshedul, Ladha, J.K., Khan, S. Rahman, Foyjunnessa, Harun-ur-Rashid, Khan, A.H., Buresh, R.J.

“…Nitrogen (N) fertilizer, while essential for high yield and profit in rice (Oryza sativa L.) farming, is often managed inefficiently by Asian rice farmers. …”
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Assessing the reliability of permanganate-oxidizable carbon as an index of soil labile carbon por Tirol-Padre, A., Ladha, J.K.

“…The rates of oxidation of SOM with KMnO4 varied among different rice (Oryza sativa L.) soils and were highly correlated with total soil C. …”
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Inheritance of resistance to bacterial blight in 21 cultivars of rice por Lee, K.S., Rasabandith, S., Angeles, E.R., Khush, G.S.

“…Genetic analysis for resistance to bacterial blight (Xanthomonas oryzae pv. oryzae) of 21 rice (Oryza sativa L.) cultivars was carried out. These cultivars were divided into two groups based on their reactions to Philippine races of bacterial blight. …”
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Acclimation of rice photosynthesis to irradiance under field conditions por Murchie, Erik H., Hubbart, Stella, Chen, Yizhu, Peng, Shaobing, Horton, Peter

“…Acclimation to irradiance was measured in terms of light-saturated photosynthetic carbon assimilation rates (Pmax), Rubisco, and pigment content in mature field-grown rice (Oryza sativa) plants in tropical conditions. Measurements were made at different positions within the canopy alongside irradiance and daylight spectra. …”
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Rapid yield loss of rice cropped successively in aerobic soil por George, Thomas, Magbanua, Roger, Garrity, Dennis P., Tubaña, Brenda S., Quiton, Jonathan

“…Upland rice (Oryza sativa L.), commonly considered to be low yielding, can be high yielding if the genotype is improved for harvest index (HI) and the crop is grown relatively free from nutrient and drought stresses. …”
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Characterization of a HKT-type transporter in rice as a general alkali cation transporter por Golldack, Dortje, Su, Hua, Quigley, Francoise, Kamasani, Uma R., Muñoz-Garay, Carlos, Balderas, Enrique, Popova, Olga V., Bennett, John, Bohnert, Hans J., Pantoja, Omar

“…We report the characterization of rice OsHKT1 (Oryza sativa ssp. indica) homologous to the wheat K+/Na+‐symporter HKT1. …”
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