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  • Electronic structure and strongly correlated systems  (5)
  • Nuclear Structure  (5)
  • Open access, Epidemiology  (5)
  • Key words Oryza sativa L.  (3)
Document type
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Analyzing quantitative trait loci for yield using a vegetatively replicated F2 population from a cross between the parents of an elite rice hybrid (2000)
    Springer
    Theoretical and applied genetics 101 (2000), S. 248-254 
    Details
    ISSN: 1432-2242
    Keywords: Key words Oryza sativa L. ; Ratoon ; Molecular marker ; QTL
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Although F2s are the most informative populations for genetic analysis, it has been difficult to use F2 populations directly for QTL analysis because it is usually difficult to assess the reliability of the data, due to an inability to estimate the experimental errors. In this study, we performed a QTL analysis for yield and yield-component traits of an F2 population based on data from replicated field trials over 2 years using vegetative shoots of ratooned plants, making use of the ratooning habit of rice. The objective of this study was to explore the possibility of conducting QTL analyses directly based on an F2 population by means of ratooning plants. The experimental population was from a cross between ’Zhenshan 97’ and ’Minghui 63’, the parents of ’Shanyou 63’, an elite rice hybrid widely grown in China. A genetic linkage map containing 151 molecular markers was constructed for QTL mapping. A total of 20 distinct QTLs were detected; eight of these were detected in both years and remaining 12 in only 1 year. Compared with the results of our previous analysis of the F2:3 families from the same cross, it was shown that most of the QTLs detected in the ratooned F2 population were also detected in the F2:3 population. However, the estimates of both additive and dominant types of genetic effects for many of the QTLs based on F2 ratoons were substantially larger than those based on F2:3 families. The results indicate that vegetatively ratooned F2 populations may have considerable utility in the mapping of QTLs, especially if dominant types of gene actions are of concern, although there were certain technical limitations in making use of such populations in the experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051476
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  • 2
    Electronic Resource
    Electronic Resource
    Differentiation and classification of parental lines and favorable genic interactions affecting F1 fertility in distant crosses of rice (Oryza sativa L.) (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 526-538 
    Details
    ISSN: 1432-2242
    Keywords: Key words Oryza sativa L. ; Genetic differentiation ; Classification of parental lines ; Restriction fragment length polymorphism (RFLP) ; Genic interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  This study was intended to investigate the extent of genetic differentiation in parental lines of rice hybrids and to analyze the genetic basis underlying the fertility phenomenon in distant crosses. Two subsets of rice material (111 entries in total) were used, including 81 doubled-haploid (DH) lines and 30 Indica and Japonica rice varieties or lines (as a control). The DH lines was derived from a heterotic Indica/Japonica cross (Gui630/02428) by anther culture. The materials in the control represent a broad spectrum of the Asian cultivated rice gene pool including landraces, primitive cultivars, historically important cultivars, modern elite cultivars, super rice and parents of superior hybrids. In accordance with the NC II design, 57 out of the DH lines were test-crossed to two important wide compatibility lines: photoperiod-sensitive genetic male sterile (PGMS) line N422s and thermo-sensitive genetic male sterile (TGMS) line Peiai64s. The F1s and their parents, 182 entries in total, were examined for the performance of seven traits in a replicated field trial. All the rice materials was surveyed for polymorphisms using 92 RFLP markers selected from two published molecular marker linkage maps. Genotypes of the F1 hybrids at the molecular-marker loci were deduced from the parental genotypes. The analysis showed that there were two types of genetic differentiation in the two subsets of rice material; that is, qualitative differentiation in the control and quantitative differentiation in the DH lines. In addition, favorable genic interactions (both intra- or inter-locus) contributed to better increase the fertility in hybrids of distant crosses through incorporation of a wide-compatibility line as the female parent. Favorable genic interactions can be applied in hybrid rice breeding programs by selecting parents with an appropriate extent of genetic differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050770
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  • 3
    Electronic Resource
    Electronic Resource
    The high level of wide-compatibility of variety ‘Dular’ has a complex genetic basis (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 407-412 
    Details
    ISSN: 1432-2242
    Keywords: Key words Oryza sativa L. ; Indica-japonica cross ; Hybrid sterility ; Molecular marker ; Genetic analysis ; Epistasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Wide-compatibility varieties (WCVs) are a special class of rice germplasm that is able to produce fertile hybrids when crossed to both indica and japonica rice varieties. WCVs may differ greatly in their spectrum and level of compatibility. The objective of this study was to determine the genetic basis of wide-compatibility conferred by ‘Dular’, a landrace variety from India that has demonstrated a high level of wide-compatibility in previous studies with a broad range of indica and japonica varieties. A three-way cross (‘Balilla/Dular//Nanjing 11’) was made and the resulting F1 population evaluated in the field for spikelet fertility. A total of 235 plants from this population was assayed individually for restriction fragment length polymorphisms (RFLPs) at 159 marker loci covering the entire rice genome at regular intervals. Quantitative trait locus (QTL) analysis identified 5 loci, located on chromosomes 1, 3, 5, 6 and 8, as having significant effects on hybrid fertility, which jointly explained 55.5% of the fertility variation in this population. The QTL on chromosome 5 ( f5) showed the largest effect on hybrid fertility, followed by those on chromosomes 6 ( f6), 3 ( f3) and 1 ( f1), with the one on chromosome 8 ( f8) having the smallest effect. Genotypes each composed of an allele from ‘Dular’ and an allele from ‘Nanjing 11’ at four ( f3, f5, f6 and f8) of the five QTLs contributed to the increase of fertility in the population. In contrast, the genotype composed of alleles from ‘Balilla’ and ‘Nanjing 11’ at the fifth locus ( f1) was in the direction of increasing fertility. Analysis of variance using marker genotypes at the five QTLs as the groups detected two interactions involving four of the five loci, a 2-locus interaction between f5 and f8 and a 3-locus interaction among f3, f5 and f6. The level of hybrid fertility is the result of complex interactions among these loci. The implication of the present findings in the utilization of the wide-compatibility of ‘Dular’ in rice breeding programs is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050910
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  • 4
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    Investigation of anomalously high transition strength for the 2_{1}^{+} state in ^{174}Os through lifetime measurement (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-11-20
    Description: Author(s): C. B. Li, X. G. Wu, X. F. Li, C. Y. He, Y. Zheng, G. S. Li, S. H. Yao, S. P. Hu, H. W. Li, J. L. Wang, J. J. Liu, C. Xu, J. J. Sun, and W. W. Qu The lifetime of the 2 1 + state in 174 Os was measured in a fast timing experiment using LaBr 3 (Ce) crystals for γ -ray detection. The excellent energy resolution in conjunction with the superb time properties of the new material allows for the reliable handling of the background, thus providing very pre... [Phys. Rev. C 86, 057303] Published Mon Nov 19, 2012
    Keywords: Nuclear Structure
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Weak electronic correlations and absence of heavy-fermion state in KNi_{2}Se_{2} (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-03-10
    Description: Author(s): Q. Fan, X. P. Shen, M. Y. Li, D. W. Shen, W. Li, X. M. Xie, Q. Q. Ge, Z. R. Ye, S. Y. Tan, X. H. Niu, B. P. Xie, and D. L. Feng We have studied the low-lying electronic structure of a new ThCr 2 Si 2 -type superconductor KNi 2 Se 2 with angle-resolved photoemission spectroscopy. Three bands intersect the Fermi level, forming complicated Fermi surface topology, which is sharply different from its isostructural superconductor K x Fe  2−... [Phys. Rev. B 91, 125113] Published Mon Mar 09, 2015
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    Nonaxial shapes in the odd-odd ^{194}Au nucleus (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-11-17
    Description: Author(s): B. S. Gao, X. H. Zhou, Y. D. Fang, Y. H. Zhang, S. C. Wang, N. T. Zhang, M. L. Liu, J. G. Wang, F. Ma, Y. X. Guo, X. G. Wu, C. Y. He, Y. Zheng, Z. M. Wang, S. C. Li, X. L. Yan, L. He, Z. G. Wang, Y. Zheng, F. Fang, and X. M. Chen High-spin states in the odd-odd 194 Au nucleus have been investigated using the 192 Os( 7 Li,5 n ) reaction at a beam energy of 44 MeV. The previously known structures built on the π h 11/2 −1 ⊗ ν i 13/2 −1 and π h 11/2 −1 ⊗ ν i 13/2 −2 ν j configurations are extended to high-spin states, and a new I π = (20 + ) state associat... [Phys. Rev. C 86, 054310] Published Fri Nov 16, 2012
    Keywords: Nuclear Structure
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    Prevalence and risk factors of uncorrected refractive error among an elderly Chinese population in urban China: a cross-sectional study (2018)
    BMJ Publishing
    In: BMJ Open
    Details
    Publication Date: 2018-03-20
    Description: Objectives To investigate the prevalence and risk factors of uncorrected refractive error (URE) in an elderly urban Chinese population in China. Design A population-based cross-sectional study. Methods The study was conducted using a cluster random sample of residents aged 50 years or older living in the Jiangning Road subdistrict, Shanghai, China. All participants underwent a standardised interview and eye examinations, including presenting visual acuity (PVA) and best-corrected visual acuity (BCVA) between November 2012 and February 2013. URE was defined as an improvement of two lines or more in the BCVA compared with the PVA in the better eye of 〈20/40. Results A total of 1999 subjects (an 82.5% response rate) completed both the questionnaire and ophthalmic examination. The prevalence of URE was 20.1% (95% CI 18.0% to 22.2%) in the study sample. After age standardisation, the prevalence of URE in Chinese people aged 50 years or older was 18.7% (95% CI 17.0% to 20.4%). Under multiple logistic regression analysis, older age (per 1-year increase, OR 1.04, 95% CI 1.03 to 1.05) and a lower level of education (OR 1.34, 95% CI 1.07 to 1.69) were significantly related to URE. A history of ocular diseases (OR 0.71, 95% CI 0.55 to 0.92) was a protective factor for URE. Conclusions URE is highly prevalent among the elderly urban Chinese population, which should raise awareness of the URE burden in China to meet the Vision 2020 goal to eliminate preventable blindness.
    Keywords: Open access, Epidemiology
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 8
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    Optimal Thromboprophylaxis in Elderly Chinese Patients with Atrial Fibrillation (ChiOTEAF) registry: protocol for a prospective, observational nationwide cohort study (2018)
    BMJ Publishing
    In: BMJ Open
    Details
    Publication Date: 2018-05-07
    Description: Introduction Atrial fibrillation (AF) is a worldwide healthcare burden that is associated with the ageing population. Elderly patients with AF with multiple comorbidities usually present with a high risk of thromboembolism and bleeding. Limited prospective data are available from Asian cohorts on the epidemiology and complications of AF. The present prospective cohort study aims to explore contemporary antithrombotic strategies among the elderly Chinese population in the new era of non-vitamin K antagonist oral anticoagulants and to compare the clinical characteristics and outcomes between Chinese and European AF populations. Methods and analysis The Optimal Thromboprophylaxis in Elderly Chinese Patients with Atrial Fibrillation (ChiOTEAF) registry will recruit 5000 patients with AF over 65 years of age in China. AF-related risks, including stroke/systemic thromboembolism and bleeding outcomes, will be assessed. Medical history, risk factors, demographic information and management will be collected at baseline, and clinical events during 1 year follow-up will be recorded. Follow-up will be conducted for at least 1 year and then annually thereafter. As our registry has a common protocol to the European Society of Cardiology EURObservational Research Programme AF general registry programme, preplanned analyses comparing the clinical profiles and outcomes will be performed. The ChiOTEAF registry offers an opportunity to provide a better understanding of the clinical profiles and adverse outcomes of patients with AF in China and allow for comparisons with a contemporary European population. Ethics and dissemination Ethics approval was granted by the Central Medical Ethic Committee of Chinese PLA General Hospital (approval no S2014-065-01). The (inter)national research presentations, peer-reviewed publications and media coverage of the research will be sued for dissemination of the results.
    Keywords: Open access, Epidemiology
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 9
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    The epidemiological profile of hysterectomy in rural Chinese women: a population-based study (2017)
    BMJ Publishing
    In: BMJ Open
    Details
    Publication Date: 2017-07-01
    Description: Objectives Hysterectomy is one of the most common surgical procedures performed on women in developed countries; however, little is known about the epidemiology of hysterectomy in low-income to middle-income regions. This study seeks to evaluate the prevalence of hysterectomy and its risk factors in rural China. Methods Questionnaires were collected from 3328 female adults aged 25â"69 years in rural Anyang, China, in 2009â"2011. Hysterectomy status was ascertained by the gynaecologist at the time of cytological test. Univariate and multivariate regression analyses were performed to assess the risk factors for hysterectomy. Results The overall prevalence of hysterectomy was 3.31% (110/3328). Women above the age of 40 years had a higher prevalence of prior hysterectomy, compared with those aged 25â"39 years (5.01% vs 0.33%). Obesity was marginally related with a higher risk of hysterectomy (adjusted OR=1.59; 95%âCI 0.99 to 2.56; body mass index (BMI) â¥28.0 vs 18.5 ⤠BMI 〈24.0). History of prior pregnancy loss conferred a greater risk for hysterectomy (adjusted OR=1.51; 95%âCI 1.02 to 2.23). Of the 75 (68.18%, 75/110) cases who provided further information on hysterectomy, 84.00% (63/75) had undergone total abdominal hysterectomy and 70.67% (53/75) had received surgery for leiomyoma. Conclusions Rural Chinese women had a relatively low prevalence of hysterectomy, and the majority of reported hysterectomies were performed abdominally for leiomyoma. Hysterectomy prevalence differed significantly by age, BMI and history of pregnancy loss. This study expands the current understanding of the epidemiology of hysterectomy in lower resource areas.
    Keywords: Open access, Epidemiology
    Electronic ISSN: 2044-6055
    Topics: Medicine
    Published by BMJ Publishing
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  • 10
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    Universal boundary entropies in conformal field theory: A quantum Monte Carlo study (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-09-20
    Description: Author(s): Wei Tang, Lei Chen, Wei Li, X. C. Xie, Hong-Hao Tu, and Lei Wang In addition to the celebrated Affleck-Ludwig entropy originating from the open boundaries of the path-integral manifold, recent research has shown that the entropy correction on nonorientable manifolds such as the Klein bottle is also a universal characterization of critical systems with an emergent conformal field theory (CFT). Here, the authors show that the Klein bottle entropy can be interpreted as a boundary effect by transforming the Klein bottle into an orientable manifold, whereby the Klein bottle entropy bears a resemblance to the Affleck-Ludwig entropy. The authors then propose a generic scheme to extract these universal boundary entropies from lattice models. Numerical results for the q -state Potts model are compared with the CFT predictions. [Phys. Rev. B 96, 115136] Published Tue Sep 19, 2017
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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