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Tracking invasion and invasiveness in Queensland fruit flies： From classical genetics to ＇omics＇

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Current Zoology 2015年第3期61卷 477-487页

作者： William B. SHERWIN Marianne FROMMER John A. SVED Kathryn A. RAPHAEL John G. OAKESHOTT Deborah C.A. SHEARMAN A. Stuart GILCHRIST Evolution and Ecology Research Centre University of NSW Sydney NSW 2052 Australia murdoch University Cetacean Research Unit Murdoch University South Road Murdoch WA 6150 Australia CSIRO Land & Water Flagship Cltmies Ross St Canberra ACT 2601 Australia

Three Australian tephritid fruit flies （Bactrocera tryoni - Q-fly, Bactrocera neohumeralis - NEO, and Bactrocera jarvisi - JAR） are promising models for genetic studies of pest status and invasiveness. The long history of ecological and physi- ological studies of the three species has been augmented by the development of a range of genetic and genomic tools, including the capacity for forced multigeneration crosses between the three species followed by selection experiments, a draft genome for Q-fly, and tissue- and stage-specific transcriptomes. The Q-fly and NEO species pair is of particular interest. The distribution of NEO is contained entirely within the wider distribution of Q-fly and the two species are ecologically extremely similar, with no known differences in pheromones, temperature tolerance, or host-fruit utilisation. However there are three clear differences be- tween them： humeral callus colour, complete pre-mating isolation based on mating time-of-day, and invasiveness. NEO is much less invasive, whereas in historical times Q-fly has invaded southeastern Australia and areas of Western Australia and the North- em Territory. In southeastern fruit-growing regions, microsatellites suggest that some of these outbreaks might derive from ge- netically differentiated populations overwintering in or near the invaded area. Q-fly and NEO show very limited genome diffe- rentiation, so comparative genomic analyses and QTL mapping should be able to identify the regions of the genome controlling mating time and invasiveness, to assess the genetic bases for the invasive strains of Q-fly, and to facilitate a variety of improve- ments to current sterile insect control strategies for that species

关键词： Bactrocera Genomics STERILE-insect-technique Interspecific-hybridisation

Application of Parzen Window estimation for incipient fault diagnosis in power transformers

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High Voltage 2018年第4期3卷 303-309页

作者： Md Mominul Islam Gareth Lee Sujeewa Nilendra Hettiwatte School of Engineering and Information Technology Murdoch UniversityMurdochPerthAustralia School of Engineering National School of Business ManagementHomagamaSri Lanka

Accurate faults diagnosis in power transformers is important for utilities to schedule maintenance and minimises the operation *** gas analysis(DGA)is one of the proven and widely accepted tools for incipient fault diagnosis in power *** improve the accuracy and solve the cases that cannot be classified using Rogers’Ratios,IEC ratios and Duval triangles methods,a novel DGA technique based on Parzen window estimation have been presented in this *** model uses the concentrations of five combustible hydrocarbon gases:methane,ethane,ethylene,acetylene and hydrogen to compute the probability of transformers fault *** of the proposed method has been evaluated against different conventional techniques and artificial intelligence-based approaches such as support vector machines,artificial neural networks,rough sets analysis and extreme learning machines for the same set of transformers.A comparison with other soft computing approaches shows that the proposed method is reliable and effective for incipient fault diagnosis in power transformers.

关键词： artificial diagnosis fault

Biochar and Compost Increase Crop Yields but the Effect is Short Term on Sandplain Soils of Western Australia

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Pedosphere 2015年第5期25卷 720-728页

作者： David J.M.HALL Richard W.BELL Department of Agriculture and Food School of Veterinary and Life Sciences Murdoch University

Sandplain soils on the south coast of Western Australia have low inherent fertility, which is mainly due to poor nutrient retention caused by insufficient clay and organic colloidal material. Previous research has shown the benefits in nutrient levels and retention from adding clay to sandplain soils; however, there is almost no information on the addition of organic amendments. A field experiment was established at the Esperance Downs Research Station, Western Australian, in May 2010, to assess the effects of wheat straw(WS) and chicken manure(CM) biochars and compost with and without phosphorus(P) addition on soil properties and crop production over five growing seasons. The five seasons alternated between winter and summer crops. The CM and WS biochar and compost treatments significantly increased crop yields and P uptake in 3, 2 and 1 of the five seasons, respectively. The yield increases(P < 0.05) were no more than 8%. By the end of the third season, no differences in crop yields were found that could be attributed to the organic amendments. The addition of P increased crop yields in each winter cropping season. Phosphorus addition explained more than 30%of the variation in crop yields. Despite marginal P levels and summer drought conditions, arbuscular mycorrhizal root colonisation was not affected by the organic amendments. There were no significant interactions between the organic amendments and P addition in terms of crop yields, P uptake or P uptake efficiency. We conclude that much of the effect of the organic amendments was due to direct nutrient addition which dissipated over time.

关键词： mycorrhizal root colonisation nutrient retention organic amendments P addition P uptake

Genome-wide association studies reveal QTL hotspots for grain brightness and black point traits in barley

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The Crop Journal 2021年第1期9卷 154-167页

作者： Yong Jia Sharon Westcott Tianhua He Lee Anne McFawn Tefera Angessa Camila Hill Cong Tan Xiaoqi Zhang Gaofeng Zhou Chengdao Li Western Barley Genetics Alliance MurdochWA 6150Australia State Agricultural Biotechnology Centre(SABC) Murdoch UniversityMurdochWA 6150Australia Department of Primary Industries and Regional Development South PerthWA 6151Australia China National GeneBank Shenzhen 518120GuangdongChina

Grain kernel discoloration(KD)in cereal crops leads to down-grading grain quality and substantial economic losses *** KD tolerant varieties requires a clear understanding of the genetic basis underlying this ***,we generated a high-density single nucleotide polymorphisms(SNPs)map for a diverse barley germplasm and collected trait data from two independent field trials for five KD related traits:grain brightness(TL),redness(Ta),yellowness(Tb),black point impact(Tbpi),and total black point in percentage(Tbpt).Although grain brightness and black point is genetically correlated,the grain brightness traits(TL,Ta,and Tb)have significantly higher heritability than that of the black point traits(Tbpt and Tbpi),suggesting black point traits may be more susceptible to environmental *** genome-wide association studies(GWAS),we identified a total of 37 quantitative trait loci(QTL),including two major QTL hotspots on chromosomes 4H and 7H,*** two QTL hotspots are associated with all five KD *** genetic linkage and gene transcription analyses identified candidate genes for the grain KD,including several genes in the flavonoid pathway and plant *** study provides valuable insights into the genetic basis for the grain KD in barley and would greatly facilitate future breeding programs for improving grain KD resistance.

关键词： Barley Black point Grain brightness GWAS Kernel discoloration SNP markers

A fuzzy risk assessment model used for assessing the introduction of African swine fever into Australia from overseas

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Artificial Intelligence in Agriculture 2023年第1期7卷 27-34页

作者： Hongkun Liu YongLin Ren Huanhuan Chu Hu Shan Kok Wai Wong College of Veterinary Medicine Qingdao Agriculture UniversityQingdaoPR China murdoch University 90 South StreetMurdochWestern Australia 6150Australia

African swine fever(ASF)is a contagious and lethal hemorrhagic disease with a high case fatality *** 2007,ASF has been spreading into many countries,especially in Europe and *** that there is no effective vaccine and treatment to deal with ASF,prevention is an important way for a country to avoid the effects of the *** is currently ASF-free but the disease has been reported in many neighboring countries,such as Indonesia,Timor-Leste,and Papua New ***,it is necessary for Australia to maintain hypervigilance to prevent the ASF *** this paper,we propose the use of fuzzy concepts to establish a fuzzy risk assessment model to predict the ASF introduction risk in *** the analysis,the international passengers(IP)and international import trade(IIT)are concluded as the two main ASF introduction factors based on transmission features and past *** the established fuzzy risk assessment model based on the analysis of the 2019 and 2020 data,the risks of ASF introduction into Australia are considered to be *** model further deduced that the Asian region was the major source of potential ***,in order to validate the effectiveness of the established fuzzy risk assessment model,the qualitative data from the Department for Environment,Food&Rural Affairs of the United Kingdom was *** the validation results,it has shown that the results were consistent when the same data is adopted,and thus proved that the functionality of the established fuzzy risk assessment model for assessing the risk in Australia.

关键词： Risk assessment Fuzzy model African swine fever(ASF) ASF introduction Australia

Pleiotropy Structures Plant Height and Seed Weight Scaling in Barley despite Long History of Domestication and Breeding Selection

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Plant Phenomics 2023年第1期5卷 85-93页

作者： Tianhua He Tefera Tolera Angessa Chengdao Li Western Crop Genetics Alliance Agricultural SciencesCollege of ScienceHealthEngineering and EducationMurdoch UniversityMurdochWAAustralia Agriculture and Food Department of Primary Industries and Regional DevelopmentSouth PerthWAAustralia

Size scaling describes the relative growth rates of different body parts of an organism following a positive *** and crop breeding often target the scaling traits in the opposite *** genetic mechanism of the size scaling influencing the pattern of size scaling remains ***,we revisited a diverse barley(Hordeum vulgare L.)panel with genome-wide single-nucleotide polymorphisms(SNPs)profile and the measurement of their plant height and seed weight to explore the possible genetic mechanisms that may lead to a correlation of the two traits and the influence of domestication and breeding selection on the size *** height and seed weight are heritable and remain positively correlated in domesticated barley regardless of growth type and *** structural equation modeling systematically evaluated the pleiotropic effect of individual SNP on the plant height and seed weight within a trait correlation *** discovered seventeen novel SNPs(quantitative trait locus)conferring pleiotropic effect on plant height and seed weight,involving genes with function in diverse traits related to plant growth and *** disequilibrium decay analysis revealed that a considerable proportion of genetic markers associated with either plant height or seed weight are closely linked in the *** conclude that pleiotropy and genetic linkage likely form the genetic bases of plant height and seed weight scaling in *** findings contribute to understanding the heritability and genetic basis of size scaling and open a new venue for seeking the underlying mechanism of allometric scaling in plants.

关键词： breeding scaling Plant

Drought can offset potential water use efficiency of forest ecosystems from rising atmospheric CO2

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Journal of Environmental Sciences 2020年第4期32卷 262-274页

作者： Ning Liu Jatin Kala Shirong Liu Vanessa Haverd Bernard Dell Keith R.J.Smettem Richard J.Harper Environmental and Conservation Sciences Murdoch UniversityMurdochWA 6150 Australia Research Institute of Forest Ecology Environment and ProtectionChinese Academy of ForestryBeijing 10091 China CSIRO Oceans&Atmosphere ACT 2600 Australia

Increasing atmospheric CO2 is both leading to climate change and providing a potential fertilisation effect on plant ***,southern Australia has also experienced a significant decline in rainfall over the last 30 years,resulting in increased vegetative water *** better understand the dynamics and responses of Australian forest ecosystems to drought and elevated CO2,the magnitude and trend in water use efficiency(WUE)of forests,and their response to drought and elevated CO2 from 1982 to 2014 were analysed,using the best available model estimates constrained by observed fluxes from simulations with fixed and time-varying *** ratio of gross primary productivity(GPP)to evapotranspiration(ET)(WUEe)was used to identify the ecosystem scale WUE,while the ratio of GPP to transpiration(Tr)(WUEc)was used as a measure of canopy scale *** increased significantly in northern Australia(p<0.001)for woody savannas(WSA),whereas there was a slight decline in the WUE of evergreen broadleaf forests(EBF)in the southeast and southwest of *** lag of WUEc to drought was consistent and relatively short and stable between biomes(<3 months),but notably varied for WUEe,with a long time-lag(mean of 10 months).The dissimilar responses of WUEe and WUEc to climate change for different geographical areas result from the different proportion of Tr in ***2 fertilization and a wetter climate enhanced WUE in northern Australia,whereas drought offset the CO2 fertilization effect in southern Australia.

关键词： Water use efficiency Elevated CO2 Carbon sequestration,drought Forest Australia

CurveNet:Curvature-Based Multitask Learning Deep Networks for 3D Object Recognition

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IEEE/CAA Journal of Automatica Sinica 2021年第6期8卷 1177-1187页

作者： A.A.M.Muzahid Wanggen Wan Ferdous Sohel Lianyao Wu Li Hou School of Communications and Information Engineering Institute of Smart CityShanghai UniversityShanghai 200444China Discipline of Information Technology Murdoch UniversityMurdoch WA 6150Australia School of Information Engineering Huangshan UniversityHuangshan 245041China

In computer vision fields,3D object recognition is one of the most important tasks for many real-world ***-dimensional convolutional neural networks(CNNs)have demonstrated their advantages in 3D object *** this paper,we propose to use the principal curvature directions of 3D objects(using a CAD model)to represent the geometric features as inputs for the 3D *** framework,namely CurveNet,learns perceptually relevant salient features and predicts object class *** directions incorporate complex surface information of a 3D object,which helps our framework to produce more precise and discriminative features for object *** learning is inspired by sharing features between two related tasks,where we consider pose classification as an auxiliary task to enable our CurveNet to better generalize object label *** results show that our proposed framework using curvature vectors performs better than voxels as an input for 3D object *** further improved the performance of CurveNet by combining two networks with both curvature direction and voxels of a 3D object as the inputs.A Cross-Stitch module was adopted to learn effective shared features across multiple *** evaluated our methods using three publicly available datasets and achieved competitive performance in the 3D object recognition task.

关键词： 3D shape analysis convolutional neural network DNNs object classification volumetric CNN

Wheat leaf senescence and its regulatory gene network

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The Crop Journal 2021年第4期9卷 703-717页

作者： Nigarin Sultana Shahidul Islam Angela Juhasz Wujun Ma State Agriculture Biotechnology Centre Murdoch UniversityPerthWA 6150Australia

Wheat leaf senescence is a developmental process that involves expressional changes in thousands of genes that ultimately impact grain protein content(GPC), grain yield(GY), and nitrogen use *** onset and rate of senescence are strongly influenced by plant hormones and environmental factors e.g. nitrogen availability. At maturity, decrease in nitrogen uptake could enhance N remobilization from leaves and stem to grain, eventually leading to leaf senescence. Early senescence is related to high GPC and somewhat low yield whereas late senescence is often related to high yield and somewhat low GPC. Early or late senescence is principally regulated by up and down-regulation of senescence associated genes. Integration of external and internal factors together with genotypic variation influence senescence associated genes in a developmental age dependent manner. Although regulation of genes involved in senescence has been studied in rice, Arabidopsis, maize, and currently in wheat, there are genotypespecific variations yet to explore. A major effort is needed to understand the interaction of positive and negative senescence regulators in determining the onset of senescence. In wheat, increasing attention has been paid to understand the role of positive senescence regulator, e.g. GPC-1, regulated gene network during early senescence time course. Recently, gene regulatory network involved early to late senescence time course revealed important senescence regulators. However, the known negative senescence regulator Ta NAC-S gene has not been extensively studied in wheat and little is known about its value in breeding. Existing data on senescence-related transcriptome studies and gene regulatory network could effectively be used for functional study in developing nitrogen efficient wheat varieties.

关键词： Wheat(Triticum aestivum L.) Senescence Nitrogen use efficiency NAC transcription factor Stay-green