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Yuan, Ping-Rong,Kim, Hyun-Jung,Chen, Qiong-Hua,Ju, Hong-Guang,Lee, Seung-Joon,Ji, Shi-Dong,Ahn, Sang-Nag 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.4
The nearly isogenic nature of the introgression lines (ILs) provides a relative advantage over other segregating populations in the rapid implementation of pyramiding approach through crosses and marker analysis. A set of 126 ILs carrying various introgressed segments from a presumed wild progenitor, Oryza rufipogon Griff. Acc. W1944 in the background of an elite Korea japonica cultivar (O. sativa L.), Hwayeongbyeo, was constructed using the marker assisted selection (MAS) technique combined with repeated backcrosses. The 126 ILs have different W1944 segments on each chromosome, with 100% coverage of wild segments on chromosome 1, while for chromosome 10, the coverage was only 33.3%. The mean number of homozygous and heterozygous donor segments were 3 (ranging from 0 to 7) and 4.7 (ranging from 1 to 14.5), respectively, and 31.6% of introgressed segments had sizes of less than 10.5 cM. A total of 41 quantitative trait loci (QTLs) and two loci associated with pericarp coloration were identified. The number of QTLs per trait ranged from 2 to 6. Phenotypic variance associated with each QTL varied from 9.1 to 52.2%, with an average of 17.1%. For 11 (26.8%) of the QTLs detected in this study, the O. rufipogon-derived alleles contributed the desired agronomic effect despite the overall inferior characteristics of the wild phenotype. Favorable alleles from the O. rufipogon accession were identified for panicle number, panicle length, days to heading, secondary branches, spikelets per panicle, and 1,000-grain weight.
Ping-Rong Yuan,Shi-Dong Ji,안상낙,김현정,Qiong-Hua Chen,Hong-Guang Ju 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.4
Quantitative trait loci (QTL) associated with four milling recovery properties, two chemical properties, six paste properties of grain, and six textural parameters of cooked rice were identified using an introgression line (IL) population of rice developed from an interspecific cross over two years. The IL population consisted of 121 lines from a cross between wild rice (O. rufipogon Griff.) and a japonica cultivar. A total of 28 QTLs were identified for the 14 traits using inter mapping. Of these, 10 were significant over two years indicating that these QTLs are stable across years and environments. For eight (21%) of the QTLs identified, the O. rufipogonderived alleles contributed a desirable effect on amylose content, protein content, minimum viscosity, final viscosity, and consistency. Among these, pc3 for protein content and ac7 for amylose content were significant in both years and showed an R² value of 25.5and 30.9%, respectively. The markers closely associated with these useful alleles can be used to trace the inheritance of specific chromosome segments in the IL population and also offer a starting point for map-based cloning of genes underlying these traits.
Yuan, Ping-Rong,Kim, Hyun-Jung,Chen, Qiong-Hua,Ju, Hong-Guang,Ji, Shi-Dong,Ahn, Sang-Nag 한국작물학회 2010 Journal of crop science and biotechnology Vol.13 No.4
Quantitative trait loci (QTL) associated with four milling recovery properties, two chemical properties, six paste properties of grain, and six textural parameters of cooked rice were identified using an introgression line (IL) population of rice developed from an interspecific cross over two years. The IL population consisted of 121 lines from a cross between wild rice (O. rufipogon Griff.) and a japonica cultivar. A total of 28 QTLs were identified for the 14 traits using inter mapping. Of these, 10 were significant over two years indicating that these QTLs are stable across years and environments. For eight (21 %) of the QTLs identified, the O. rufipogon-derived alleles contributed a desirable effect on amylose content, protein content, minimum viscosity, final viscosity, and consistency. Among these, pc3 for protein content and ac7 for amylose content were significant in both years and showed an $R^2$ value of 25.5 and 30.9%, respectively. The markers closely associated with these useful alleles can be used to trace the inheritance of specific chromosome segments in the IL population and also offer a starting point for map-based cloning of genes underlying these traits.
Ping-Rong Yuan,Hyun-Jung Kim,Qiong-Hua Chen,Hong-Guang Ju,Seung-Joon Lee,Shi-Dong Ji,안상낙 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.4
The nearly isogenic nature of the introgression lines (ILs) provides a relative advantage over other segregating populations in therapid implementation of pyramiding approach through crosses and marker analysis. A set of 126 ILs carrying various introgressedsegments from a presumed wild progenitor, Oryza rufipogon Griff. Acc. W1944 in the background of an elite Korea japonica cultivar(O. sativa L.), Hwayeongbyeo, was constructed using the marker assisted selection (MAS) technique combined with repeatedbackcrosses. The 126 ILs have different W1944 segments on each chromosome, with 100% coverage of wild segments on chromosome1, while for chromosome 10, the coverage was only 33.3%. The mean number of homozygous and heterozygous donor segmentswere 3 (ranging from 0 to 7) and 4.7 (ranging from 1 to 14.5), respectively, and 31.6% of introgressed segments had sizes ofless than 10.5 cM. A total of 41 quantitative trait loci (QTLs) and two loci associated with pericarp coloration were identified. Thenumber of QTLs per trait ranged from 2 to 6. Phenotypic variance associated with each QTL varied from 9.1 to 52.2%, with an averageof 17.1%. For 11 (26.8%) of the QTLs detected in this study, the O. rufipogon-derived alleles contributed the desired agronomiceffect despite the overall inferior characteristics of the wild phenotype. Favorable alleles from the O. rufipogon accession were identifiedfor panicle number, panicle length, days to heading, secondary branches, spikelets per panicle, and 1,000-grain weight.
An Improved Variable Step Size MPPT Algorithm Based on INC
Zhi-rong Xu,Ping Yang,Dong-bao Zhou,Peng Li,Jin-yong Lei,Yuan-rui Chen 전력전자학회 2015 JOURNAL OF POWER ELECTRONICS Vol.15 No.2
In order to ensure that photovoltaic (PV) systems work at the maximum power point (MPP) and maximize the economic benefits, maximum power point tracking (MPPT) techniques are normally applied to these systems. One of the most widely applied MPPT methods is the incremental conductance (INC) method. However, the choice of the step size still remains controversial. This paper presents an improved variable step size INC MPPT algorithm that uses four different step sizes. This method has the advantages of INC but with the ability to validly adjust the step size to adapt to changes of the PV’s power curve. The presented algorithm also simultaneously achieves increased rapidity and accuracy when compared with the conventional fixed step size INC MPPT algorithm. In addition, the theoretical derivation and specific applications of the proposed algorithm are presented here. This method is validated by simulation and experimental results.
Prognostic Significance of CD44v6/v7 in Acute Promyelocytic Leukemia
Chen, Ping,Huang, Hui-Fang,Lu, Rong,Wu, Yong,Chen, Yuan-Zhong Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8
CD44v, especially splice variants containing exon v6, has been shown to be related closely to development of different tumors. High levels of CD44v6/v7 have been reported to be associated with invasiveness and metastasis of many malignancies. The objective of this study was to detect expression of CD44v6-containing variants in patients with acute promyelocytic leukemia (APL) and evaluate the potential of CD44v6/v7 for risk stratification. Reverse transcription polymerase chain reaction (RT-PCR) followed by PCR product purification, ligation into T vectors and positive clone sequencing were used to detect CD44 v6-containing variant isoforms in 23 APL patients. Real-time quantitative PCR of the CD44v6/v7 gene was performed in patients with APL and in NB4 cells that were treated with all-trans retinoic acid (ATRA) or arsenic trioxide ($As_2O_3$). Sequencing results identified four isoforms (CD44v6/v7, CD44v6/v8/v10, CD44v6/v8/v9/v10, and CD44v6/v7/v8/v9/v10) in bone marrow mononuclear cells of 23 patients with APL. The level of CD44v6/v7 in high-risk cases was significantly higher than those with low-risk. Higher levels of CD44v6/v7 were found in three patients with central nervous system relapse than in other patients inthe same risk group. Furthermore, in contrast to ATRA, only $As_2O_3$ could significantly down-regulate CD44v6/v7 expression in NB4 cells. Our data suggest that CD44v6/v7 expression may be a prognostic indicator for APL.
TOSS: Telecom Operations Support Systems for Broadband Services
Chen, Yuan-Kai,Hsu, Chang-Ping,Hu, Chung-Hua,Lin, Rong-Syh,Lin, Yi-Bing,Lyu, Jian-Zhi,Wu, Wudy,Young, Hey-Chyi Korea Information Processing Society 2010 Journal of information processing systems Vol.6 No.1
Due to the convergence of voice, data, and video, today's telecom operators are facing the complexity of service and network management to offer differentiated value-added services that meet customer expectations. Without the operations support of well-developed Business Support System/Operations Support System (BSS/OSS), it is difficult to timely and effectively provide competitive services upon customer request. In this paper, a suite of NGOSS-based Telecom OSS (TOSS) is developed for the support of fulfillment and assurance operations of telecom services and IT services. Four OSS groups, TOSS-P (intelligent service provisioning), TOSS-N (integrated large-scale network management), TOSS-T (trouble handling and resolution), and TOSS-Q (end-to-end service quality management), are organized and integrated following the standard telecom operation processes (i.e., eTOM). We use IPTV and IP-VPN operation scenarios to show how these OSS groups co-work to support daily business operations with the benefits of cost reduction and revenue acceleration.
Novel Anticandidal Activity of a Recombinant Lampetra japonica RGD3 Protein
( Cai Ping Wu ),( Li Lu ),( Yuan Yuan Zheng ),( Xin Liu ),( Rong Xiao ),( Ji Hong Wang ),( Qing Wei Li ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.7
Lj-RGD3, an RGD (Arg-Gly-Asp) toxin protein from the salivary gland of Lampetra japonica,exhibits antifungal activity against Candida albicans. Lj-RGD3 has three RGD motifs and shows homology to histidine-rich glycoprotein. We synthesised two mutant derivatives of Lj-RGD3: Lj-26, which lacks all three RGD motifs and contains no His residues; and Lj-112, which lacks only the three RGD motifs. We investigated the effects of the wild-type and mutated toxins on a gram-positive bacterium (Escherichia coli), a gram-negative bacterium (Staphylococcus aureus), and a fungus (C. albicans). rLj-RGD3 and its mutants exhibited antifungal but not antibacterial activity, as measured by a radial diffusion assay. The C. albicans inhibition zone induced by rLj-112 was larger than that induced by the other proteins, and its inhibitory effect on C. albicans was dose-dependent. In viable-count assays, the rLj-112 MIC was 7.7 μM, whereas the MIC of the positive control (ketoconazole) was 15 μM. Time-kill kinetics demonstrated that rLj-112 effectively killed C. albicans at 1× and 2× MIC within 12 and 6 h, respectively. Electron microscopy analysis showed that rLj-RGD3 and rLj-112 induced C. albicans lysis. Our results demonstrate a novel anticandidal activity for rLj-RGD3 and its mutant derivatives.