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Genetic Detection of Clubroot Resistance Loci in a New Population of Brassica rapa
Wenxing Pang,Shan Liang,Xiaonan Li,Pengpeng Li,Sha Yu,임용표,Zhong Yun Piao 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.6
Clubroot is one of the most serious diseases affecting Brassica crop production worldwide. In order toidentify the location of clubroot resistance genes in Chinese cabbage, we constructed a linkage map for an F2 populationderived from a cross between a resistant turnip inbred line, ‘Siloga’ (B. rapa ssp. rapifera), and a susceptible Chinesecabbage inbred line, ‘BJN3’ (B. rapa ssp. pekinensis). The newly developed genetic map included 207 markers andcovered 1151.7 cM. In combination with clubroot resistance tests from the field, the data allowed us to identify threequantitative trait loci of clubroot resistance, using a composite interval mapping method. Clubroot resistance genesQS_B1.1, QS_B3.1, and QS_B8.1 were located on chromosomes A1, A3, and A8, respectively, of B. rapa. Theircontribution rates were 8.18%, 70.55%, and 7.28%, respectively. QS_B1.1 was a novel locus of clubroot resistance,independent of any published clubroot-resistance loci. QS_B3.1 was first detected in ‘Siloga,’ mapped to the previousCRb and CRa region, whereas QS_B8.1 was closely linked to Crr1b. Epistatic interactions with additive effects weredetected between QS_B3.1 and QS_B8.1.
Tissue Culture and Micropropagation of Tree Peony (Paeonia suffruticosa Andr.)
da Silva, Jaime A. Teixeira,Shen, Miaomiao,Yu, XiaoNan 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Tree peony (Paeonia suffruticosa) is one of China's most traditional flowers. It is also one of the most remarkable flowering ornamentals with a rich history of breeding. The speed and success of propagation have always been a major concern for breeders and cultivators. Tissue culture is one of the few effective methods to overcome these inherent difficulties. This article reviews advances made on various aspects of tree peony tissue culture and micropropagation, including the in vitro culture of buds, stem apex, leaves and petioles, sexual embryos and ovules, somatic embryos, anther and callus. Since the vast majority of literature is published in Chinese, this review provides a unique and valuable resource and spring-board from which to initiate or further studies related to in vitro culture of tree peony.
Tissue Culture and Micropropagation of Tree Peony (Paeonia suffruticosa Andr.)
Jaime A Teixeira da Silva,Miaomiao Shen,XiaoNan Yu 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.3
Tree peony (Paeonia suffruticosa) is one of China’s most traditional flowers. It is also one of the most remarkable flowering ornamentals with a rich history of breeding. The speed and success of propagation have always been a major concern for breeders and cultivators. Tissue culture is one of the few effective methods to overcome these inherent difficulties. This article reviews advances made on various aspects of tree peony tissue culture and micropropagation, including the in vitro culture of buds, stem apex, leaves and petioles, sexual embryos and ovules, somatic embryos, anther and callus. Since the vast majority of literature is published in Chinese, this review provides a unique and valuable resource and spring-board from which to initiate or further studies related to in vitro culture of tree peony.
Ramchiary, Nirala,Nguyen, Van Dan,Li, Xiaonan,Hong, Chang Pyo,Dhandapani, Vignesh,Choi, Su Ryun,Yu, Ge,Piao, Zhong Yun,Lim, Yong Pyo Oxford University Press 2011 DNA research Vol.18 No.5
<P>Genic microsatellite markers, also known as functional markers, are preferred over anonymous markers as they reveal the variation in transcribed genes among individuals. In this study, we developed a total of 707 expressed sequence tag-derived simple sequence repeat markers (EST-SSRs) and used for development of a high-density integrated map using four individual mapping populations of <I>B. rapa</I>. This map contains a total of 1426 markers, consisting of 306 EST-SSRs, 153 intron polymorphic markers, 395 bacterial artificial chromosome-derived SSRs (BAC-SSRs), and 572 public SSRs and other markers covering a total distance of 1245.9 cM of the <I>B. rapa</I> genome. Analysis of allelic diversity in 24 <I>B. rapa</I> germplasm using 234 mapped EST-SSR markers showed amplification of 2 alleles by majority of EST-SSRs, although amplification of alleles ranging from 2 to 8 was found. Transferability analysis of 167 EST-SSRs in 35 species belonging to cultivated and wild <I>brassica</I> relatives showed 42.51% (<I>Sysimprium leteum</I>) to 100% (<I>B. carinata, B. juncea</I>, and <I>B. napus</I>) amplification. Our newly developed EST-SSRs and high-density linkage map based on highly transferable genic markers would facilitate the molecular mapping of quantitative trait loci and the positional cloning of specific genes, in addition to marker-assisted selection and comparative genomic studies of <I>B. rapa</I> with other related species.</P>
Transparent Lamellar Porous Material and Its Greatly Reduced Dielectric Constant
Lili Liu,Cuijiao Zhao,Yawen Huang,Xiaonan Wei,Hongtao Yu,Junxiao Yang 한국고분자학회 2017 Macromolecular Research Vol.25 No.10
One trend for low dielectric materials is to reach low dielectric constant values at as low porosity as possible. In this work, a lamellar porous material was prepared by spin-coating of poly(vinyl alcohol) (PVA)/manganese dioxide (MnO2) nanosheet composited film, followed by cross-linking of PVA and removing nanosheets. FTIR, XRD and TGA measurement results demonstrate that the templates were almost completely removed. SEM image shows that the etched PVA film has a lamellar porous structure. Dielectric test results indicate that at the porosity of only 17.5%, the dielectric constant of porous PVA is reduced to approximately half that of neat cross-linked PVA. The serial model shows a good consistence with experimental dielectric constant value. This explains well the high efficiency of lamellar porous structure in reducing dielectric constant.
( Lixiang Chen ),( Cong Wang ),( Shun Li ),( Xin Yu ),( Xue Liu ),( Rongrong Ren ),( Wenwen Liu ),( Xiaojing Zhou ),( Xiaonan Zhang ),( Xiaohui Zhou ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.4
Chlamydiae, obligate intracellular bacteria, are associated with a variety of human diseases. The chlamydial life cycle undergoes a biphasic development: replicative reticulate bodies (RBs) phase and infectious elementary bodies (EBs) phase. At the end of the chlamydial intracellular life cycle, EBs have to be released to the surrounded cells. Therefore, the interactions between Chlamydiae and cell death pathways could greatly influence the outcomes of Chlamydia infection. However, the underlying molecular mechanisms remain elusive. Here, we investigated host cell death after Chlamydia infection in vitro, in L929 cells, and showed that Chlamydia infection induces cell necrosis, as detected by the propidium iodide (PI)-Annexin V double-staining flow-cytometric assay and Lactate dehydrogenase (LDH) release assay. The production of reactive oxygen species (ROS), an important factor in induction of necrosis, was increased after Chlamydia infection, and inhibition of ROS with specific pharmacological inhibitors, diphenylene iodonium (DPI) or butylated hydroxyanisole (BHA), led to significant suppression of necrosis. Interestingly, live-cell imaging revealed that Chlamydia infection induced lysosome membrane permeabilization (LMP). When an inhibitor upstream of LMP, CA-074-Me, was added to cells, the production of ROS was reduced with concomitant inhibition of necrosis. Taken together, our results indicate that Chlamydia infection elicits the production of ROS, which is dependent on LMP at least partially, followed by induction of host-cell necrosis. To our best knowledge, this is the first live-cell-imaging observation of LMP post Chlamydia infection and report on the link of LMP to ROS to necrosis during Chlamydia infection.