|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Identification of an AFLP marker linked to the stripe rust resistance gene Yr10 in wheat显示文摘AFLP analysis of near-isogenic lines of the stripe rust resistance gene Yr10 was carried out with 6 Pst I -primers and 10 Taq I -primers with the donor parent of Yr1O gene as the check. A total of about 4200 distinguishable bands were amplified, of which 5 were stable. The genetic linkage of the 5 polymorphic DNA fragments with the target gene were tested preliminarily on a segregating F2 population derived from a cross between the gene donor parent 'Moro' and susceptible cultivar 'Mingxian 169'. The DNA fragment PT0502 was found closely linked to the Yr10 gene and cloned and sequenced. Based on the sequence specific primers for PCR were designed and synthesized. Genetic linkage analysis with 195 segregating F2 plants indicated that the genetic distance was 0.5 cM between the main product SC200 fragment produced by PCR with the primers and the Yr10 gene. The primers can be used to detect the Yr10 gene quickly, effectively and exactly. | SHAO Ymgtian NIU Yongchun ZHU Lihuang ZHAI Wenxue XU Shichang WU Liren | 2001 | Chinese Science Bulletin2001，46，17： | 9 |
| 2 | Wheat powdery mildew resistance gene Pm64 derived from wild emmer (Triticum turgidum var.dicoccoides) is tightly linked in repulsion with stripe rust resistance gene Yr5显示文摘Stripe rust and powdery mildew are both devastating diseases for durum and common wheat.Pyramiding of genes conferring resistance to one or more diseases in a single cultivar is an important breeding approach to provide broader spectra of resistances in wheat improvement. A new powdery mildew resistance gene originating from wild emmer(Triticum turgidum var.dicoccoides) backcrossed into common wheat(T. aestivum) line WE35 was identified. It conferred an intermediate level of resistance to Blumeria graminis f. sp. tritici isolate E09 at the seedling stage and a high level of resistance at the adult plant stage. Genetic analysis showed that the powdery mildew resistance in WE35 was controlled by a dominant gene designated Pm64. Bulked segregant analysis(BSA) and molecular mapping indicated that Pm64 was located in chromosome bin 2 BL4-0.50–0.89. Polymorphic markers were developed from the corresponding genomic regions of Chinese Spring wheat and wild emmer accession Zavitan to delimit Pm64 to a 0.55 cM genetic interval between markers WGGBH1364 and WGGBH612, corresponding to a 15 Mb genomic region on Chinese Spring and Zavitan 2 BL, respectively. The genetic linkage map of Pm64 is critical for fine mapping and cloning. Pm64 was completely linked in repulsion with stripe rust resistance gene Yr5. Analysis of a larger segregating population might identify a recombinant line with both genes as a valuable resource in breeding for resistance to powdery mildew and stripe rust. | Deyun Zhang Keyu Zhu Lingli Dong Yong Liang Genqiao Li Tilin Fang Guanghao Guo Qiuhong Wu Jingzhong Xie Yongxing Chen Ping Lu Miaomiao Li Huaizhi Zhang Zhenzhong Wang Yan Zhang Qixin Sun Zhiyong Liu | 2019 | The Crop Journal2019，7，6： | 8 |
| 3 | Effect of Ni on the corrosion resistance of bridge steel in a simulated hot and humid coastal-industrial atmosphere显示文摘The corrosion resistance of weathering bridge steels containing conventional contents of Ni(0.20 wt%, 0.42 wt%, 1.50 wt%) and a higher content of Ni(3.55 wt%) in a simulated hot and humid coastal-industrial atmosphere was investigated by corrosion depth loss, scanning electron microscopy–energy-dispersive X-ray spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical methods. The results showed that, with increasing Ni content, the mechanical properties of the bridge steel were markedly improved, the welding parameters were satisfactory at room temperature, and the corrosion resistance was enhanced. When the Ni content was low(≤0.42 wt%), the crystallization process of the corrosion products was substantially promoted, enhancing the stability of the rust layer. When the Ni content was higher(~3.55 wt%), the corrosion reaction of the steel quickly reached a balance, because the initial rapid corrosion induced the formation of a protective rust layer in the early stage. Simultaneously, NiO and NiFe_2O_4 were generated in large quantities; they not only formed a stable, compact, and continuous oxide protective layer, but also strongly inhibited the transformation process of the corrosion products. This inhibition reduced the structural changes in the rust layer, thereby enhancing the protection. However, when the Ni content ranged from 0.42 wt% to 1.50 wt%, the corrosion resistance of the bridge steel increased only slightly. | Dong-liang Li Gui-qin Fu Miao-yong Zhu Qing Li Cheng-xiang Yin | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，3： | 7 |
| 4 | Understanding the lifestyles and pathogenicity mechanisms of obligate biotrophic fungi in wheat:The emerging genomics era显示文摘Obligate biotrophic fungi cause serious and widespread diseases of crop plants, but are challenging to investigate because they cannot be cultured in vitro. The two economically important groups of biotrophic fungi parasitizing wheat are the rust and powdery mildew pathogens, but their obligate biotrophic lifestyles and pathogenicity mechanisms are not well understood at the molecular level. With the advent of next generation sequencing technology, increasing numbers of pathogen genomes are becoming available. Research in plant pathology has entered a new genomics era. This review summarizes recent progress in understanding the biology and pathogenesis of biotrophic fungal pathogens attacking wheat based on pathogen genomics. We particularly focus on the three wheat rust and the powdery mildew fungi in regard to genome sequencing, avirulence gene cloning, effector discovery, and pathogenomics. We predict that coordinated study of both wheat and its pathogens should reveal new insights in biotrophic adaptation, pathogenicity mechanisms,and population dynamics of these fungi that will assist in development of new strategies for breeding wheat varieties with durable resistance. | Chunlei Tang Qiang Xu Mengxin Zhao Xiaojie Wang Zhensheng Kang | 2018 | The Crop Journal2018，6，1： | 6 |
| 5 | 华山松疱锈病的重寄生真菌(深绿木霉)中几丁质酶基因cDNA片段的克隆(英文)显示文摘[Objective] The aim of this study was to isolate chitinase gene from Trichoderma atroviride strain SS003. [Method] With the aeciospore wall of armandii pine blister rust as inducer, chitinase gene was induced to express in Trichoderma atroviride cells. The cDNA fragment of chitinase gene was cloned by RT-PCR approach. [Result] The activity of chitinase induced reached 40.17 μg/10 min; and the specific fragment amplified was 834 bp in length and proved to be the fragment of chitinase gene by sequencing and sequence analysis. [Conclusion] The result showed the feasibility of isolating the full length of chitinase gene and its transformation, and further producing chitinase. | 马长乐 李靖 陈玉惠 刘小烛 | 2008 | Agricultural Science & Technology2008，9，6： | 5 |
| 6 | Seedling and adult plant resistance to leaf rust in 46 Chinese bread wheat landraces and 39 wheat lines with known Lr genes显示文摘Wheat leaf rust,caused by Puccinia triticina(Pt),is an important foliar disease that has an important influence on wheat yield.The most economic,safe and effective way to control the disease is growing resistant cultivars.In the present study,a total of 46 wheat landraces and 34 wheat lines with known Lr(leaf rust resistance)genes were inoculated with 16Pt pathotypes for postulating seedling resistance gene(s)in the greenhouse.These cultivars and five wheat differential lines with adult plant resistance(APR)genes(Lr12,Lr22b,Lr34,Lr35 and Lr37)were also evaluated for identification of slow rusting resistance in the field trials in Baoding,Hebei Province of China in the 2014–2015 and 2015–2016 cropping seasons.Furthermore,10 functional molecular markers closely linked to 10 known Lr genes were used to detect all the wheat genotypes.Results showed that most of the landraces were susceptible to most of the Pt pathotypes at seedling stage.Nonetheless,Lr1 was detected only in Hongtangliangmai.The field experimental test of the two environments showed that 38 landraces showed slow rusting resistance.Seven cultivars possessed Lr34 but none of the landraces contained Lr37 and Lr46.Lr genes namely,Lr9,Lr19,Lr24,Lr28,Lr29,Lr47,Lr51 and Lr53 were effective at the whole plant stage.Lr18,Lr36 and Lr45 had lost resistance to part of pathotypes at the seedling stage but showed high resistance at the adult plant stage.Lr34 as a slowing rusting gene showed good resistance in the field.Four race-specific APR genes Lr12,Lr13,Lr35 and Lr37 conferred good resistance in the field experiments.Seven race-specific genes,Lr2b,Lr2c,Lr11,Lr16,Lr26,Lr33 and LrB had lost resistance.The 38 landraces showed slow rusting resistance to wheat leaf rust can be used as resistance resources for wheat resistance breeding in China. | ZHANG Pei-pei Takele Weldu Gebrewahid ZHOU Yue LI Qing-luo LI Zai-feng LIU Da-qun | 2019 | Journal of Integrative Agriculture2019，18，5： | 5 |
| 7 | Mapping stripe rust resistance genes by BSR-Seq:YrMM58 and YrHY1 on chromosome 2AS in Chinese wheat lines Mengmai 58 and Huaiyang 1 are Yr17显示文摘Stripe rust(yellow rust), caused by Puccinia striiformis f. sp. tritici(PST),is one of the most devastating fungal diseases in common wheat(Triticum aestivum L.) in China and worldwide. Resistance breeding is the most effective strategy to control diseases in crop plants. Chinese wheat lines Mengmai 58 and Huaiyang 1 are highly resistant to PST race CYR34(V26) at the adult plant stage. To genetically map the underlying resistance genes we developed segregating populations by crossing Mengmai 58 and Huaiyang 1 with the susceptible cultivar Nongda 399. The stripe rust resistances in Mengmai 58 and Huaiyang 1 were both controlled by single dominant genes, provisionally designated YrMM58 and YrHY1, respectively. Bulked segregant RNA-Seq(BSR-Seq) analysis showed that YrMM58 and YrHY1 were located in the same distal ~16 Mb region on chromosome 2 AS.Comparative genomics analysis with the physical map of Aegilops tauschii proved useful for developing additional markers to saturate the genetic linkage map. YrMM58 and YrHY1 were mapped to the distal end of chromosome arm 2 AS, with the closest marker WGGB148 being 7.7 cM and 3.8 cM from the resistance gene, which was considered to be Yr17. These markers can be used in marker-assisted selection. | Yong Wang Huaizhi Zhang Jingzhong Xie Bingmin Guo Yongxing Chen Huaiyu Zhang Ping Lu Qiuhong Wu Miaomiao Li Deyun Zhang Guanghao Guo Jian Yang Panpan Zhang Yan Zhang Xicheng Wang Hong Zhao Tingjie Cao Zhiyong Liu | 2018 | The Crop Journal2018，6，1： | 5 |
| 8 | Effect of chloride ion on corrosion behavior of low carbon steel in 0.1 M NaHCO_3 solution with different dissolved oxygen concentrations显示文摘The corrosion behavior of low carbon steel in 0.1 M NaHCO_3+ 0.1 M NaCl solution with different dissolved oxygen concentrations was investigated with gravimetric tests and electrochemical measurements.Results show that the corrosion mass loss of steel is remarkably increased with the addition of chloride ion. In the initial stage, the carbon steel tends to active dissolution due to the dissolution effect of chloride ion on the oxide film; as a result, the corrosion potential maintains as low values. With the immersion time going by, the corrosion potential of the steel is promoted as a result of the accumulation of the corrosion products. However, the rust layer is loose and porous due to the deteriorating effect of chloride ion, which decreases the reduction resistance of oxygen. Meanwhile, the porous rust layer could be repaired by the depolarization of oxygen. Under the synergistic effect of chloride ion and oxygen, the corrosion of the steel is accelerated during the repeated process of dissolution and reparation of the oxide film. | Fang Xue Xin Wei Junhua Dong Changgang Wang Wei Ke | 2019 | Journal of Materials Science & Technology2019，35，4： | 5 |
| 9 | 近地高光谱和低空航拍数字图像遥感监测小麦条锈病的比较研究显示文摘分别利用近地高光谱和低空航拍数字图像同时对田间小麦条锈病的发生情况进行监测,结果表明近地高光谱遥感参数DVI、NDVI、GNDVI和低空航拍数字图像颜色特征值R、G、B与病情指数存在极显著相关性,整体上,所选近地高光谱参数与病情指数的相关性要优于低空航拍数字图像参数与病情指数的相关性,而且近地高光谱参数DVI、NDVI、GNDVI与低空航拍数字图像参数R、G、B之间均存在极显著负相关关系。分别建立了基于近地高光谱参数GNDVI和低空航拍数字图像参数R的田间小麦条锈病病情估计模型,模型均达到较好的拟合效果,其中近地高光谱参数GNDVI对小麦条锈病的监测效果好于低空航拍数字图像参数R,而低空航拍数字图像具有可以进行大面积快速监测的优势,因此在实际应用中可以根据需要选择其中一种方法或参数来估计田间小麦条锈病的发生和流行程度。 | 刘伟 杨共强 徐飞 乔红波 范洁茹 宋玉立 周益林 | 2018 | 植物病理学报2018，48，2： | 4 |
| 10 | 黄淮麦区小麦资源中高温抗条锈性品种的筛选(英文)显示文摘[Objective] The study aimed to screen wheat cultivars with high temperature resistance to stripe rust from the wheat resources in Huanghuai growth area. [Method] Seedlings of 165 wheat cultivars from Huanghuai growth area were identified by wheat stripe rust under high temperature; then the wheat cultivars showing stripe rust at seedling stage were further used to identify the same resistance in field. [Results] 13 cultivars were proved to be stripe rust resistant under high temperature, and the expression stages of stripe rust in the 13 cultivars were revealed. The field identification results confirmed the identification results at seedling stage via inoculation of mixed stripe rust of physiological races. The stripe resistances of wheat cultivars were also proved to be non-race-specific. [Conclusion] Wheat resources in Huanghuai growth area are abundant in wheat cultivars with high temperature resistance to stripe rust. | 杨炜迪 陈宏灏 王美南 | 2008 | Agricultural Science & Technology2008，9，3： | 4 |
| 11 | Corrosion behavior of high-strength spring steel for high-speed railway显示文摘The corrosion resistance and evolution of corrosion products in medium-carbon high-strength spring steels were investigated in a neutral salt spray(5 wt% Na Cl solution). A formation model of γ-Fe OOH and a transformation model describing the conversion of γ-Fe OOH to α-Fe OOH were constructed. The results indicated that, at the initial corrosion stage, the corrosion resistance was gradually improved with the addition of Cr; however, with the addition of alloying element V, the corrosion resistance decreased. These results were attributed mainly to the initial corrosion stage being closely related to the matrix microstructure parameters such as grain-boundary character and dislocation density. After the rust layer was formed at a later corrosion stage, the corrosion resistance was reinforced with the addition of Cr and V because Cr strongly influenced the composition, structure, and morphology of the corrosion products. The results presented herein show that Cr was conducive to the transformation of γ-Fe OOH into α-Fe OOH. Moreover, V and Cr exhibited obvious synergy and were enriched in the inner layer of the corrosion products. | Gang Niu Yin-li Chen Hui-bin Wu Xuan Wang Di Tang | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，5： | 4 |
| 12 | Molecular mapping of stripe rust resistance gene YrH9017 in wheat-Psathyrostachys huashanica introgression line H9017-14-16-5-3显示文摘Several new stripe rust pathogen races emerged in the wheat growing regions of China in recent years.These races were virulent to most of the designated wheat seedling resistance genes.Thus,it is necessary and worthwhile to identify new valuable resistant materials for the sake of diversifying resistant sources,pyramiding different resistance genes and achieving durable resistance.Here,we identified the resistance gene,temporarily designated as YrH9017,in wheat-Psathyrostachys huashanica introgression line H9017-14-16-5-3.A total of 146 F2 plants and their derived F2:3 families in a cross of Mingxian 169 and H9017-14-16-5-3 were used to evaluate seedling stripe rust response and as a mapping population.Finally,we constructed a genetic map including eight simple sequence repeat(SSR) markers and expressed sequence tag(EST) markers.YrH9017 was located on the long arm of chromosome 2A and closely linked with two EST-sequence tagged site(EST-STS) markers BG604577 and BE471201 at 1.3 and 1.8 cM distance,respectively.The two closest markers could be used for marker-assisted selection of YrH9017 in breeding. | MA Dong-fang HOU Lu SUN Cai ZHANG Xing YIN Jun-liang GUO Qing-yun ZHU Yong-xing | 2019 | Journal of Integrative Agriculture2019，18，1： | 3 |
| 13 | YR36/WKS1-Mediated Phosphorylation of PsbO,an Extrinsic Member of Photosystem Ⅱ,Inhibits Photosynthesis and Confers Stripe Rust Resistance in Wheat显示文摘Wheat stripe rust,due to infection by Puccinia striiformis f.sp.tritici(Pst),is a devastating disease that causes significant global grain yield losses.Yr36,which encodes Wheat Kinase START1(WKS1),is an effec-tive high-temperature adult-plant resistance gene and confers resistance to a broad spectrum of Pst races.We previously showed that WKS1 phosphorylates the thylakoid ascorbate peroxidase protein and reduces its ability to detoxify peroxides,which may contribute to the accumulation of reactive oxygen species(ROS).WKS1-mediated Pst resistance is accompanied by leaf chlorosis in Pst-infected regions,but the un-derlying mechanisms remain elusive.Here,we show that WKS1 interacts with and phosphorylates PsbO,an extrinsic member of photosystem Ⅱ(PS Ⅱ),to reduce photosynthesis,regulate leaf chlorosis,and confer Pst resistance.A point mutation in PsbO-A1 or reduction in its transcript levels by RNA interference resulted in chlorosis and reduced Pst sporulation.Biochemical analyses revealed that WKS1 phosphorylates PsbO at two conserved amino acids involved in physical interactions with PS Ⅱ and reduces the binding affinity of PsbO with PS Ⅱ.Presumably,phosphorylated PsbO proteins dissociate from the PS Ⅱ complex and then un-dergo rapid degradation by cysteine and aspartic proteases.Taken together,these results demonstrate that perturbations of wheat PsbO by point mutation or phosphorylation by WKS1 reduce the rate of photo-synthesis and delay the growth of Pst pathogen before the induction of ROS. | Shuai Wang Qiu-Ping Li Jianfeng Wang Yan Yan Guo-Liang Zhang Yan Yan Huifei Zhang Jiajie Wu Feng Chen Xiaojie Wang Zhensheng Kang Jorge Dubcovsky Jin-Ying Gou | 2019 | Molecular Plant2019，12，12： | 3 |
| 14 | POTENTIAL'S FLUCTUATION OF RUST PREVENTING OIL FILM DURING ITS DEGRADATION显示文摘Potential’s fluctuation of rust preventing oil film during its degradation was studied using wirebeam electrode. Being non-destructive and simple, potential measurement is a very repetitive method. Otherelectrochemical testing method, e. g., polarization resistance, can breakdown the integrity of oil coating byDC current; EIS is time consuming. As a special electrochemical sensor, wire beam electrode contains 101wires of mild steel wires, and it is helpful to improve the reproducibility of electrochemical test evidently.Using this electrode, the electrochemical parameters and their distribution which was related to under filmcorrosion process are measured directly so as to describe potential’s fluctuation of rust preventing oil film. Itis pointed out that there is potential’s fluctuation on rust preventing oil film during its degradation, and thischaracteristic has direct effect on the self-repairing ability of rust preventing oil film. However, for the uncoated metal electrode and base oil film, there is no such behavior. It is also pointed out that inhibitors in theoil film have direct effect on its self-repairing ability. | Jiang Hanying Zhong Qingdong Shu Yude(Institute of Metallurgical Physicochemistry and Materials, Central SouthUniversity of Technology, Changsha 410083, China) | 1997 | Journal of Central South University1997，9，1： | 2 |
| 15 | Insight into the triggering effect of(Al,Mg,Ca,Mn)-oxy-sulfide inclusions on localized corrosion of weathering steel显示文摘The surface properties of weathering steel(WS)is very important for its service performance and safety,and the localized corrosion induced by inclusions is closely related to the surface properties of WS and its application.In the current work,a common spherical(Al,Mg,Ca,Mn)-oxy-sulfide inclusion was selected to investigate the corrosion evolution of complex inclusion and its effect on localized corrosion on WS surface.The results indicate the inclusion in WS consists of(Ca,Mn)sulfides part and(Ca,Al,Mg)oxides part with complex core-shell structure.Locally preferential dissolution occurs in(Ca,Mn)sulfides part as well as metal matrix around the inclusions.Furthermore,both parts of the inclusions with poor conductivity and high-density dislocation at metal matrix around the inclusions was found,which suggests that traditional micro-galvanic corrosion cell may not be the cause of inclusion-induced localized corrosion on WS surface at initial stage of corrosion.The variation in maximum and average depth around the inclusion or selected region with immersion time indicates that localized corrosion induced by inclusions is overwhelmed by uniform corrosion of WS in the latter stage of immersion,then the rust formed on WS surface consists of two layers. | Pan Liu Qinhao Zhang Xinran Li Jiming Hu Fahe Cao | 2021 | Journal of Materials Science & Technology2021，，5： | 2 |
| 16 | Identification of three Berberis species as potential alternate hosts for Puccinia striiformis f. sp. tritici in wheat-growing regions of Xinjiang, China显示文摘Since the recent discovery of barberry(Berberis spp.)as an alternate host for the stripe rust pathogen Puccinia striiformis,many Chinese Berberis species have been identified as alternate hosts for P.striiformis f.sp.tritici.However,little is known about Berberis species and their distribution in wheat-growing regions in Xinjiang,China,where stripe rust is endemic.As the largest province or autonomous region,Xinjiang represents a relatively independent epidemic region for wheat stripe rust in China.In this study,we con ducted a survey of barberry plants in the main wheat-growi ng areas of Xinjiang.We iden tified three Berberis species,B.heteropoda,B.nummularia and B.kaschgarica,and con firmed their roles as potential alternate hosts for P.striiformis f.sp.tritici in the laboratory. | ZHUANG Hua ZHAO Jing HUANG Li-li KANG Zhen-sheng ZHAO Jie | 2019 | Journal of Integrative Agriculture2019，18，12： | 2 |
| 17 | Comparative FISH and molecular identification of new stripe rust resistant wheat-Thinopyrum intermedium ssp. trichophorum introgression lines显示文摘Thinopyrum intermedium(2 n = 6 x = 42, JJJ^sJ^sStSt) has been hybridized extensively with common wheat and has proven to be a valuable germplasm source for improving disease resistance, quality attributes, and yield potential in wheat. We characterized new disease resistant wheat-Th. intermedium derivatives A1082 and A5-5 using sequential multi-color fluorescence in situ hybridization(mc-FISH), genomic in situ hybridization(GISH), PCRbased landmark unique gene(PLUG) and intron targeting(IT) markers. A1082 was identified as a wheat-Th. intermedium 3J disomic addition line, and A5-5 was a T4BS·5J^sL homozygous Robertsonian translocation line. Seventy-one and 106 pairs of primers amplified Th.intermedium-specific bands allowing chromosomes 3J and 5J^s to be tracked, respectively. A new oligonucleotide probe, Oligo-6 H-2-100, was developed for FISH labeling of the subterminal region of the long arm of chromosome 5J^s. Both lines were highly resistant to stripe rust pathogen races prevalent in Chinese field screening nurseries. A5-5 also displayed a significant increase in tiller number compared to its wheat parent. The new lines can be exploited as useful germplasms for wheat improvement. | Jianbo Li Qiheng Chen Peng Zhang Tao Lang Sami Hoxha Guangrong Li Zujun Yang | 2019 | The Crop Journal2019，7，6： | 2 |
| 18 | Progress in breeding for resistance to Ug99 and other races of the stem rust fungus in CIMMYT wheat germplasm显示文摘Races belonging to the Ug99(TTKSK) lineage of the wheat stem rust fungus, carrying complex virulence combinations, and their migration to countries in Africa,Middle East and Asia continue to pose a significant threat to global wheat production.The rapid spread of additional races, e.g., TKTTF or the Digalu lineage, in several countries causing localized epidemics reminds us of the vulnerability of wheat germplasm to stem rust disease, a formidable foe referenced as early as biblical times.A global rust monitoring system reflecting increased surveillance efforts has identified 13 races within the Ug99 lineage in 13 countries and unrelated lineages are emerging, spreading and posing serious threats to wheat production.Race TKTTF has caused localized epidemics in Ethiopia and its variants have been recently implicated in stem rust outbreaks in Europe.Concerted research efforts have resulted in the identification of several new resistance genes and gene combinations for use in breeding.Combining multiple adult plant resistance(APR) genes in high-yielding backgrounds and discovery of new quantitative trait loci conferring stem rust resistance has progressed in the recent years, enhancing the durability of resistance.Effective gene stewardship and new generation breeding materials and cultivars that combine multiple race-specific or minor to intermediate effect APR genes,complemented by active surveillance and monitoring, have helped to limit major epidemics and increase grain yield potential in key target environments. | Sridhar BHAVANI David PHODSON Julio HUERTA-ESPINO Mandeep SRANDHAWA Ravi PSINGH | 2019 | Frontiers of Agricultural Science and Engineering2019，6，3： | 1 |
| 19 | Influence of chromium on the initial corrosion behavior of low alloy steels in the CO_2–O_2–H_2S–SO_2 wet–dry corrosion environment of cargo oil tankers显示文摘The influence of Cr on the initial corrosion behavior of low-alloy steels exposed to a CO2–O2–H2S–SO2 wet–dry corrosion environment was investigated using weight-loss measurements, scanning electron microscopy, N2 adsorption tests, X-ray diffraction analysis, and electrochemical impedance spectroscopy. The results show that the corrosion rate increases with increasing Cr content in samples subjected to corrosion for 21 d. However, the rust grain size decreases, its specific surface area increases, and it becomes more compact and denser with increasing Cr content, which indicates the enhanced protectivity of the rust. The results of charge transfer resistance(Rct) calculations indicate that higher Cr contents can accelerate the corrosion during the first 7 d and promote the formation of the enhanced protective inner rust after 14 d; the formed protective inner rust is responsible for the greater corrosion resistance during long-term exposure. | Qing-he Zhao Wei Liu Jie Zhao Dong Zhang Peng-cheng Liu Min-xu Lu | 2015 | International Journal of Minerals,Metallurgy and Materials2015，22，8： | 1 |
| 20 | Effects of UV-B radiation intensity and timing on epidemiological components of wheat stripe rust显示文摘Stripe rust caused by Puccinia striiformis f. sp. tritici is an important wheat disease worldwide that is greatly influenced by environmental conditions. Ultraviolet B(UV-B) radiation is one important environmental factor affecting the occurrence and epidemiology of wheat stripe rust. Investigating UV-B radiation effects on the epidemiology of stripe rust may be conducive to monitoring and predicting this disease. In this study, wheat seedlings were exposed to UV-B radiation during different periods under laboratory conditions and radiation effects on epidemiological components of wheat stripe rust were investigated. Results showed that incubation period was shortened, and the infection efficiency, sporulation quantity and disease index increased when UV-B radiation was performed only pre-inoculation. When the UV-B radiation was performed only postinoculation or both pre-and post-inoculation, the incubation period was prolonged, and the infection efficiency, sporulation quantity and disease index were reduced. When healthy wheat seedlings were inoculated using urediospores collected from wheat leaves irradiated by UV-B only post-inoculation or both pre-and post-inoculation, infection efficiency, sporulation quantity and disease index were also reduced. However, in the latter, the disease incubation period did not differ under varying UV-B radiation intensities compared to that when wheat leaves were not treated with UV-B radiation. Overall, the effects of direct exposure of wheat plants to UV-B radiation with different intensities in different periods on epidemiological components of wheat stripe rust were systematically explored, and the results suggest that the effects of UV-B radiation increased gradually with the increase of UV-B radiation intensity. This information provides a basis for monitoring and predicting this disease as well as for conducting further studies on pathogen virulence variation. | WANG Hui QIN Feng CHENG Pei MA Zhan-hong WANG Hai-guang | 2018 | Journal of Integrative Agriculture2018，17，12： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员