Prediction of parental combination for introduction of stay-green associated loci in wheat     

Henrique de Souza Luche  José Antonio Gonzalez da Silva  Rafael Nornberg  Emilio Ghisleni Arenhardt  Vanderlei da Rosa Caetano  Luciano Carlos da Maia  Antonio Costa de Oliveira 《Journal of Crop Science and Biotechnology》2017,20(2):73-80

In wheat, the increase of yield and stability associated traits can be achieved by combining parents containing the stay-green trait and favorable alleles for grain yield. The aim of this work was to analyze the genetic dissimilarity between wheat lines from stay-green and synchronized maturation groups and elite cultivars. Moreover, to propose promising combinations seeking the selection of high-grain yield and high bread-making quality genotypes containing stay-green trait. The experiment was conducted in a randomized block design with three replications in 2003, 2004, and 2005, using sister-lines with the presence and absence of stay-green trait and elite cultivars. Genetic variability exists among wheat strains from the synchronized stay-green maturation group and elite cultivars. Genotypes of maturation group stay-green obtained an average performance superior to the synchronized group. Crosses between stay-green lines and the CEP 29 and BRS 177 cultivars are promising in the selection of genotypes carrying the stay-green trait with high yield and bread-making quality.  相似文献   

Novel infectious bronchitis virus S1 genotypes in Mexico 1998-1999.     

J Gelb  B S Ladman  M Tamayo  M Gonzalez  V Sivanandan 《Avian diseases》2001,45(4):1060-1063

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Genetic variability in cultivated common bean beyond the two major gene pools   总被引：7，自引：0，他引：7  

F.M.A. Islam  K.E. Basford  R.J. Redden  A.V. Gonzalez  P.M. Kroonenberg  S. Beebe 《Genetic Resources and Crop Evolution》2002,49(3):271-283

It is generally accepted that two major gene pools exist in cultivatedcommon bean (Phaseolus vulgaris L.), a MiddleAmerican and an Andean one. Some evidence, based on unique phaseolin morphotypesand AFLP analysis, suggests that at least one more gene pool exists incultivated common bean. To investigate this hypothesis, 1072 accessions from acommon bean core collection from the primary centres of origin, held at CIAT,were investigated. Various agronomic and morphological attributes (14categorical and 11 quantitative) were measured. Multivariate analyses,consisting of homogeneity analysis and clustering for categorical data,clustering and ordination techniques for quantitative data and nonlinearprincipal component analysis for mixed data, were undertaken. The results ofmost analyses supported the existence of the two major gene pools. However, theanalysis of categorical data of protein types showed an additional minor genepool. The minor gene pool is designated North Andean and includes phaseolintypes CH, S and T; lectin types 312, Pr, B and K; and mostly A5, A6 and A4 types-amylase inhibitor. Analysis of the combined categorical data ofprotein types and some plant categorical data also suggested that some othergermplasm with C type phaseolin are distinguished from the major gene pools.  相似文献   

Occurrence and distribution of organochlorine pesticides (OCPs) in tomato (Lycopersicon esculentum) crops from organic production     

Gonzalez M  Miglioranza KS  Aizpún de Moreno JE  Moreno VJ 《Journal of agricultural and food chemistry》2003,51(5):1353-1359

Organochlorine pesticides (OCPs) were quantified by GC-ECD in tomato (Lycopersicon esculentum) during a vegetation period. Plants were harvested at 15, 60, and 151 days after seed germination. Leaves, stem, roots, and fruit (peel and flesh) were analyzed separately. The results showed that tomato plants were able to accumulate OCPs from soils, and a trend to reach the equilibrium among tissues at mature stages was also observed. Endosulfans comprised the main OCP group, probably due to its spray during summer months in the surrounding areas. Banned pesticides such as DDTs, heptachlor, and dieldrin were found. OCPs levels in the fruit were below the maximum residues limits (MRL) considered by the Codex Alimentarius. DDE/DDT and alpha-/gamma-HCH ratios of <1 would indicate recent inputs of DDT and lindane in the environment. The occurrence of OCPs in the study farm, where agrochemicals have never been used, is a result of atmospheric deposition of those pesticides.  相似文献   

Blind inlets: conservation practices to reduce herbicide losses from closed depressional areas     

Javier M. Gonzalez  Douglas R. Smith  Stan Livingston  Elizabeth Warnemuende-Pappas  Martha Zwonitzer 《Journal of Soils and Sediments》2016,16(7):1921-1932

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Ecological effects of a major oil spill on panamanian coastal marine communities   总被引：1，自引：0，他引：1  

Jackson JB  Cubit JD  Keller BD  Batista V  Burns K  Caffey HM  Caldwell RL  Garrity SD  Getter CD  Gonzalez C  Guzman HM  Kaufmann KW  Knap AH  Levings SC  Marshall MJ  Steger R  Thompson RC  Weil E 《Science (New York, N.Y.)》1989,243(4887):37-44

In 1986 more than 8 million liters of crude oil spilled into a complex region of mangroves, seagrasses, and coral reefs just east of the Caribbean entrance to the Panama Canal. This was the largest recorded spill into coastal habitats in the tropical Americas. Many population of plants and animals in both oiled and unoiled sites had been studied previously, thereby providing an unprecedented measure of ecological variation before the spill. Documenation of the spread of oil and its biological begun immediately. Intertidal mangroves, algae, and associated invertebrates were covered by oil and died soon after. More surprisingly, there was also extensive mortality of shallow subtidal reef corals and infauna of seagrass beds. After 1.5 years only some organisms in areas exposed to the open sea have recovered.  相似文献   

A Chemoautotrophically Based Cave Ecosystem   总被引：1，自引：0，他引：1  

SM Sarbu  TC Kane  BK Kinkle 《Science (New York, N.Y.)》1996,272(5270):1953-1955

Microbial mats discovered in a ground-water ecosystem in southern Romania contain chemoautotrophic bacteria that fix inorganic carbon, using hydrogen sulfide as an energy source. Analysis of stable carbon and nitrogen isotopes showed that this chemoautotrophic production is the food base for 48 species of cave-adapted terrestrial and aquatic invertebrates, 33 of which are endemic to this ecosystem. This is the only cave ecosystem known to be supported by in situ autotrophic production, and it contains the only terrestrial community known to be chemoautotrophically based.  相似文献   

Growth of SiO2 at room temperature with the use of catalyzed sequential half-reactions     

JW Klaus  O Sneh  SM George 《Science (New York, N.Y.)》1997,278(5345):1934-1936

Films of silicon dioxide (SiO2) were deposited at room temperature by means of catalyzed binary reaction sequence chemistry. The binary reaction SiCl4 + 2H2O --> SiO2 + 4HCl was separated into SiCl4 and H2O half-reactions, and the half-reactions were then performed in an ABAB ellipsis sequence and catalyzed with pyridine. The pyridine catalyst lowered the deposition temperature from >600 to 300 kelvin and reduced the reactant flux required for complete reactions from approximately 10(9) to approximately 10(4) Langmuirs. Growth rates of approximately 2.1 angstroms per AB reaction cycle were obtained at room temperature for reactant pressures of 15 millitorr and 60-second exposure times with 200 millitorr of pyridine. This catalytic technique may be general and should facilitate the chemical vapor deposition of other oxide and nitride materials.  相似文献   

THE USE OF IONIC EXCHANGE RESINS FOR THE PURIFICATION OF PENICILLIN AND HYPERTENSIN     

Cruz-Coke E  Gonzalez F  Hulsen W 《Science (New York, N.Y.)》1945,101(2622):340

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"Science is sciencing"     

Gonzalez NL 《Science (New York, N.Y.)》1983,219(4583):345

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