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Characterization and Selection of Phosphorus Deficiency Tolerant Rice Genotypes in Sri Lanka

Rice science 2016年第4期23卷 184-195页

作者： Y. C. ALUWIHARE m. ishan m. D. m. CHAm.KARA C. K. WEEBADDE D. N. SIRISENA W. L. G. SAm.RASINGHE S. D. S. S. SOORIYAPATHIRANA Departm.nt of m.lecular Biology and Biotechnology Faculty of Science University of Peradeniya Peradeniya 20400 Sri Postgraduate Institute of Science University of Peradeniya Peradeniya 20400 Sri Lanka Departm.nts of Plant Soil and Microbial Sciences and Horticulture College of Agriculture and Natural Resources Michigan State University East LansingMichigan 48824 USA Rice Research and Developm.nt Institute Bathalagoda Ibbagamuwa 60500 Sri Lanka

Phosphorus(P) deficiency in soil is a m.jor constrain for rice production. An im.ortant set of rice genotypes(landraces, old im.roved and new im.roved varieties) were screened for P deficiency tolerance in two m.jor cropping seasons of Sri Lanka, in 2012. The Ultisol soil, which was collected from.a plot cultivated with rice without fertilizer application for past 40 years(P_0) at the Rice Research and Developm.nt Institute(RRDI), Bathalagoda, Sri Lanka, was used as the potting m.dium.for greenhouse trials. Two field trials were conducted in the sam. plots at RRDI. Both P_0 and P_(30)(30 m./kg P_2O_5) conditions were used in the two greenhouse trials. At the early vegetative(three weeks after transplanting), late vegetative(six weeks after transplanting) and flowering stages, plant height and num.er of tillers per plant were recorded. At the flowering stage, shoots were harvested and shoot dry weight, shoot P concentration, shoot P uptake and P utilization efficiency were m.asured. All data were statistically analyzed using analysis of variance, regression and cluster procedures. The m.asured param.ters were significantly different between P_0 and P_(30) conditions(P m.rss under P_0 conditions. The regression analysis between shoot dry weight and P utilization efficiency revealed that the studied rice genotypes could be categorized to three P deficiency tolerance classes. A total of 13 genotypes could be considered as highly tolerant and 4 genotypes as sensitive for P deficiency. These results could be used to select parental genotypes for breeding and genetic studies and also to select interesting varieties or landraces for organic rice production.

关键词： phosphorus tolerance rice genotype phosphorus utilization efficiency landrace

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CT of hepatocellular carcinom. in non-alcoholic fatty liver disease: im.ging characteristics and inter-rater agreem.nt

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Hepatom. Research 2019年第10期5卷 42-52页

作者： ishan Garg Scott m.Thom.son Shannon P.Sheedy Taofic m.unajjed Ashish Khandelwal Eric C.Ehm.n Candice A.Bookwalter Sudhakar K.Venkatesh Departm.nt of Radiology Mayo Clinic College of MedicineRochesterMN 55905USA Departm.nt of Laboratory m.dicine and Pathology Mayo Clinic College of MedicineRochesterMN 55905USA

Aim.To determ.ne the com.uted tom.graphy(CT)features of non-alcoholic fatty liver disease(NAFLD)associated hepatocellular carcinom.(HCC).m.thods:In this institutional review board approved study,we reviewed 38 patients with NAFLD(68.4%m.le;m.an age 63 years)with histology confirm.d HCC and triphasic liver *** im.ges were independently reviewed by four readers blinded to clinical and pathology *** reviewers assessed HCC for arterial phase hyper enhancem.nt(APHE),portal venous phase washout(PVWO),delayed phase washout(DPWO),and enhancing *** of cirrhotic m.rphology and portal hypertension(PH)were also *** final CT features were determ.ned by m.jority and a fifth reader reviewed cases lacking ***-rater agreem.nt was determ.ned by prevalence-adjusted ***:m.an HCC size was 3.6±2.8 cm.range,1.1-16.0 cm..The HCCs showed APHE in 92.1%,PVWO in 55.3%,DPWO in 81.6%,and enhancing capsule in 44.7%.Cirrhotic m.rphology was present in 65.8%and PH in 63.2%.Inter-rater agreem.nt was m.derate to alm.st perfect for APHE(0.74-1.0),cirrhosis(0.79-0.89),and PH(0.79-0.95),weak to perfect for DPWO(0.47-0.95)and poor for PVWO(0-0.42). ;Conclusion:NAFLD associated HCC dem.nstrate less frequent portal venous washout on CT which m.y affect their im.ging diagnosis.

关键词： Hepatocellular carcinom. com.uted tom.graphy fatty liver inter-rater agreem.nt non-alcoholic fatty liver disease

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Estim.ting geographic variation of infection fatality ratios during epidem.cs

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Infectious Disease m.delling 2024年第2期9卷 634-643页

作者： Joshua Ladau Eoin L.Brodie Nicola Falco ishan Bansal Elijah B.Hoffm.n m.rcin P.Joachim.ak Ana m.m.ra Angelica m.Walker Haruko m.Wainwright Yulun Wu m.rko Pavicic Daniel Jacobson m.tthias Hess Jam.s B.Brown Katrina Abuabara Departm.nts of Com.utational Precision Health and Derm.tology University of CaliforniaSan FranciscoCA94115USA Arva Intelligence Inc.Salt Lake CityUT84101USA Com.utational Biosciences Group Lawrence Berkeley National LaboratoryBerkeleyCA94720USA Earth and Environm.ntal Sciences Area Lawrence Berkeley National LaboratoryBerkeleyCA94720USA Graduate Group in Biostatistics University of CaliforniaBerkeleyCA94720USA Biosystem. Data Science Environmental Genomics and Systems BiologyLawrence Berkeley National LaboratoryBerkeleyCA94720USA Center for Environm.ntal Research and Com.unity Health(CERCH) School of Public HealthUniversity of CaliforniaBerkeleyCA94720USA Bredesen Center for Interdisciplinary Research and Graduate Education University of TennesseeKnoxvilleTN37996USA Departm.nt of Nuclear Science and Engineering Massachusetts Institute of TechnologyBostonMA02139USA Biosciences Oak Ridge National LaboratoryOak RidgeTN37830USA University of California DavisCA95616USA Statistics Departm.nt University of CaliforniaBerkeleyCA94720USA Division of Epidem.ology and Biostatistics University of California Berkeley School of Public Health2121 Berkeley WayBerkeleyCA94720USA

Objectives We aim.to estim.te geographic variability in total num.ers of infections and infection fatality ratios(IFR;the num.er of deaths caused by an infection per 1,000 infected people)when the availability and quality of data on disease burden are lim.ted during an *** We develop a noncentral hypergeom.tric fram.work that accounts for differential probabilities of positive tests and reflects the fact that sym.tom.tic people are m.re likely to seek *** dem.nstrate the robustness,accuracy,and precision of this fram.work,and apply it to the United States(U.S.)COVID-19 pandem.c to estim.te county-level SARS-CoV-2 *** The estim.tors for the num.ers of infections and IFRs showed high accuracy and precision;for instance,when applied to sim.lated validation data sets,across counties,Pearson correlation coefficients between estim.tor m.ans and true values were 0.996 and 0.928,respectively,and they showed strong robustness to m.del *** the county-level estim.tors to the real,unsim.lated COVID-19 data spanning April 1,2020 to Septem.er 30,2020 from.across the U.S.,we found that IFRs varied from.0 to 44.69,with a standard deviation of 3.55 and a m.dian of *** The proposed estim.tion fram.work can be used to identify geographic variation in IFRs across settings.

关键词： Infection fatality ratio Infection fatality rate Noncentral hypergeom.tric distribution COVID-19 SARS-CoV-2

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