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Subhash Chander - One of the best experts on this subject based on the ideXlab platform.

  • Simulation of climatic change impact on Crop-Pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker)
    Climatic Change, 2015
    Co-Authors: Selvaraj Krishnan, Subhash Chander
    Abstract:

    As climatic change impacts would depend upon complex interactions between climatic and biological factors, Crop simulation models would play an important role in predicting such an impact. Present study thus aimed at simulating climatic change impacts on Crop-Pest interactions through a coupled Crop-Pest model. Based on temperature-dependent development of pink stem borer, Sesamia inferens (Walker) at six constant temperatures viz . , 18, 21, 24, 27, 30, 33 and 35 ± 1 °C, thermal constants for eggs, larvae and pupae were determined as 47.6, 700 and 166.7° days, respectively through a linear model with corresponding lower development thresholds being 13.8, 10.6 and 12.7 °C. Besides, optimum temperature and upper developmental threshold, respectively were found to be 34.6 and 36.2 °C for eggs, 34.5 and 36.4 °C for larvae, and 31.7 and 37.0 °C for pupae of the pink stem borer through a non-linear model. Based on the thermal requirements, and biotic and abiotic mortalities, a mechanistic holometabolous population simulation model for S. inferens was developed and coupled to InfoCrop-rice model. This coupled InfoCrop model could satisfactorily simulate the PSB dynamics and Crop-Pest interactions. Validated model was used to simulate the impacts of climatic change on S. inferens population and rice Crop in accordance with four ‘standard special report on emissions scenarios’, A1, A2, B1 and B2. Simulations revealed that S. inferens population would decline to the extent of 5.82–22.8 % by 2020 and 19.0–42.7 % by 2050 under Delhi conditions. Following decline in Pest population, S. inferens induced yield losses also revealed a declining trend under changed climate. The coupled Crop-Pest model can be easily adapted to diverse agro-environments and applied to simulate the Pest dynamics and Crop losses under location-specific situations.

  • Simulation of climatic change impact on Crop-Pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker)
    Climatic Change, 2015
    Co-Authors: Selvaraj Krishnan, Subhash Chander
    Abstract:

    As climatic change impacts would depend upon complex interactions between climatic and biological factors, Crop simulation models would play an important role in predicting such an impact. Present study thus aimed at simulating climatic change impacts on Crop-Pest interactions through a coupled Crop-Pest model. Based on temperature-dependent development of pink stem borer, Sesamia inferens (Walker) at six constant temperatures viz., 18, 21, 24, 27, 30, 33 and 35 ± 1 °C, thermal constants for eggs, larvae and pupae were determined as 47.6, 700 and 166.7° days, respectively through a linear model with corresponding lower development thresholds being 13.8, 10.6 and 12.7 °C. Besides, optimum temperature and upper developmental threshold, respectively were found to be 34.6 and 36.2 °C for eggs, 34.5 and 36.4 °C for larvae, and 31.7 and 37.0 °C for pupae of the pink stem borer through a non-linear model. Based on the thermal requirements, and biotic and abiotic mortalities, a mechanistic holometabolous population simulation model for S. inferens was developed and coupled to InfoCrop-rice model. This coupled InfoCrop model could satisfactorily simulate the PSB dynamics and Crop-Pest interactions. Validated model was used to simulate the impacts of climatic change on S. inferens population and rice Crop in accordance with four ‘standard special report on emissions scenarios’, A1, A2, B1 and B2. Simulations revealed that S. inferens population would decline to the extent of 5.82–22.8 % by 2020 and 19.0–42.7 % by 2050 under Delhi conditions. Following decline in Pest population, S. inferens induced yield losses also revealed a declining trend under changed climate. The coupled Crop-Pest model can be easily adapted to diverse agro-environments and applied to simulate the Pest dynamics and Crop losses under location-specific situations. Copyright Springer Science+Business Media Dordrecht 2015

Patricia Valle Pinheiro - One of the best experts on this subject based on the ideXlab platform.

  • The draft genome of whitefly Bemisia tabaci MEAM1, a global Crop Pest, provides novel insights into virus transmission, host adaptation, and insecticide resistance
    BMC Biology, 2016
    Co-Authors: Wenbo Chen, Daniel K. Hasegawa, Patricia Valle Pinheiro, Marcus C. Stensmyr, Adi Kliot, Junbo Luan, Wenli Liu, Yi Zheng, Navneet Kaur, Honghe Sun
    Abstract:

    BackgroundThe whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is among the 100 worst invasive species in the world. As one of the most important Crop Pests and virus vectors, B. tabaci causes substantial Crop losses and poses a serious threat to global food security.ResultsWe report the 615-Mb high-quality genome sequence of B. tabaci Middle East-Asia Minor 1 (MEAM1), the first genome sequence in the Aleyrodidae family, which contains 15,664 protein-coding genes. The B. tabaci genome is highly divergent from other sequenced hemipteran genomes, sharing no detectable synteny. A number of known detoxification gene families, including cytochrome P450s and UDP-glucuronosyltransferases, are significantly expanded in B. tabaci. Other expanded gene families, including cathepsins, large clusters of tandemly duplicated B. tabaci-specific genes, and phosphatidylethanolamine-binding proteins (PEBPs), were found to be associated with virus acquisition and transmission and/or insecticide resistance, likely contributing to the global invasiveness and efficient virus transmission capacity of B. tabaci. The presence of 142 horizontally transferred genes from bacteria or fungi in the B. tabaci genome, including genes encoding hopanoid/sterol synthesis and xenobiotic detoxification enzymes that are not present in other insects, offers novel insights into the unique biological adaptations of this insect such as polyphagy and insecticide resistance. Interestingly, two adjacent bacterial pantothenate biosynthesis genes, panB and panC, have been co-transferred into B. tabaci and fused into a single gene that has acquired introns during its evolution.ConclusionsThe B. tabaci genome contains numerous genetic novelties, including expansions in gene families associated with insecticide resistance, detoxification and virus transmission, as well as numerous horizontally transferred genes from bacteria and fungi. We believe these novelties likely have shaped B. tabaci as a highly invasive polyphagous Crop Pest and efficient vector of plant viruses. The genome serves as a reference for resolving the B. tabaci cryptic species complex, understanding fundamental biological novelties, and providing valuable genetic information to assist the development of novel strategies for controlling whiteflies and the viruses they transmit.

  • the draft genome of whitefly bemisia tabaci meam1 a global Crop Pest provides novel insights into virus transmission host adaptation and insecticide resistance
    BMC Biology, 2016
    Co-Authors: Wenbo Chen, Daniel K. Hasegawa, Patricia Valle Pinheiro, Adi Kliot, Junbo Luan, Navneet Kaur, Marcus C. Stensmyr
    Abstract:

    The whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is among the 100 worst invasive species in the world. As one of the most important Crop Pests and virus vectors, B. tabaci causes substantial Crop losses and poses a serious threat to global food security. We report the 615-Mb high-quality genome sequence of B. tabaci Middle East-Asia Minor 1 (MEAM1), the first genome sequence in the Aleyrodidae family, which contains 15,664 protein-coding genes. The B. tabaci genome is highly divergent from other sequenced hemipteran genomes, sharing no detectable synteny. A number of known detoxification gene families, including cytochrome P450s and UDP-glucuronosyltransferases, are significantly expanded in B. tabaci. Other expanded gene families, including cathepsins, large clusters of tandemly duplicated B. tabaci-specific genes, and phosphatidylethanolamine-binding proteins (PEBPs), were found to be associated with virus acquisition and transmission and/or insecticide resistance, likely contributing to the global invasiveness and efficient virus transmission capacity of B. tabaci. The presence of 142 horizontally transferred genes from bacteria or fungi in the B. tabaci genome, including genes encoding hopanoid/sterol synthesis and xenobiotic detoxification enzymes that are not present in other insects, offers novel insights into the unique biological adaptations of this insect such as polyphagy and insecticide resistance. Interestingly, two adjacent bacterial pantothenate biosynthesis genes, panB and panC, have been co-transferred into B. tabaci and fused into a single gene that has acquired introns during its evolution. The B. tabaci genome contains numerous genetic novelties, including expansions in gene families associated with insecticide resistance, detoxification and virus transmission, as well as numerous horizontally transferred genes from bacteria and fungi. We believe these novelties likely have shaped B. tabaci as a highly invasive polyphagous Crop Pest and efficient vector of plant viruses. The genome serves as a reference for resolving the B. tabaci cryptic species complex, understanding fundamental biological novelties, and providing valuable genetic information to assist the development of novel strategies for controlling whiteflies and the viruses they transmit.

Marcus C. Stensmyr - One of the best experts on this subject based on the ideXlab platform.

  • The draft genome of whitefly Bemisia tabaci MEAM1, a global Crop Pest, provides novel insights into virus transmission, host adaptation, and insecticide resistance
    BMC Biology, 2016
    Co-Authors: Wenbo Chen, Daniel K. Hasegawa, Patricia Valle Pinheiro, Marcus C. Stensmyr, Adi Kliot, Junbo Luan, Wenli Liu, Yi Zheng, Navneet Kaur, Honghe Sun
    Abstract:

    BackgroundThe whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is among the 100 worst invasive species in the world. As one of the most important Crop Pests and virus vectors, B. tabaci causes substantial Crop losses and poses a serious threat to global food security.ResultsWe report the 615-Mb high-quality genome sequence of B. tabaci Middle East-Asia Minor 1 (MEAM1), the first genome sequence in the Aleyrodidae family, which contains 15,664 protein-coding genes. The B. tabaci genome is highly divergent from other sequenced hemipteran genomes, sharing no detectable synteny. A number of known detoxification gene families, including cytochrome P450s and UDP-glucuronosyltransferases, are significantly expanded in B. tabaci. Other expanded gene families, including cathepsins, large clusters of tandemly duplicated B. tabaci-specific genes, and phosphatidylethanolamine-binding proteins (PEBPs), were found to be associated with virus acquisition and transmission and/or insecticide resistance, likely contributing to the global invasiveness and efficient virus transmission capacity of B. tabaci. The presence of 142 horizontally transferred genes from bacteria or fungi in the B. tabaci genome, including genes encoding hopanoid/sterol synthesis and xenobiotic detoxification enzymes that are not present in other insects, offers novel insights into the unique biological adaptations of this insect such as polyphagy and insecticide resistance. Interestingly, two adjacent bacterial pantothenate biosynthesis genes, panB and panC, have been co-transferred into B. tabaci and fused into a single gene that has acquired introns during its evolution.ConclusionsThe B. tabaci genome contains numerous genetic novelties, including expansions in gene families associated with insecticide resistance, detoxification and virus transmission, as well as numerous horizontally transferred genes from bacteria and fungi. We believe these novelties likely have shaped B. tabaci as a highly invasive polyphagous Crop Pest and efficient vector of plant viruses. The genome serves as a reference for resolving the B. tabaci cryptic species complex, understanding fundamental biological novelties, and providing valuable genetic information to assist the development of novel strategies for controlling whiteflies and the viruses they transmit.

  • the draft genome of whitefly bemisia tabaci meam1 a global Crop Pest provides novel insights into virus transmission host adaptation and insecticide resistance
    BMC Biology, 2016
    Co-Authors: Wenbo Chen, Daniel K. Hasegawa, Patricia Valle Pinheiro, Adi Kliot, Junbo Luan, Navneet Kaur, Marcus C. Stensmyr
    Abstract:

    The whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is among the 100 worst invasive species in the world. As one of the most important Crop Pests and virus vectors, B. tabaci causes substantial Crop losses and poses a serious threat to global food security. We report the 615-Mb high-quality genome sequence of B. tabaci Middle East-Asia Minor 1 (MEAM1), the first genome sequence in the Aleyrodidae family, which contains 15,664 protein-coding genes. The B. tabaci genome is highly divergent from other sequenced hemipteran genomes, sharing no detectable synteny. A number of known detoxification gene families, including cytochrome P450s and UDP-glucuronosyltransferases, are significantly expanded in B. tabaci. Other expanded gene families, including cathepsins, large clusters of tandemly duplicated B. tabaci-specific genes, and phosphatidylethanolamine-binding proteins (PEBPs), were found to be associated with virus acquisition and transmission and/or insecticide resistance, likely contributing to the global invasiveness and efficient virus transmission capacity of B. tabaci. The presence of 142 horizontally transferred genes from bacteria or fungi in the B. tabaci genome, including genes encoding hopanoid/sterol synthesis and xenobiotic detoxification enzymes that are not present in other insects, offers novel insights into the unique biological adaptations of this insect such as polyphagy and insecticide resistance. Interestingly, two adjacent bacterial pantothenate biosynthesis genes, panB and panC, have been co-transferred into B. tabaci and fused into a single gene that has acquired introns during its evolution. The B. tabaci genome contains numerous genetic novelties, including expansions in gene families associated with insecticide resistance, detoxification and virus transmission, as well as numerous horizontally transferred genes from bacteria and fungi. We believe these novelties likely have shaped B. tabaci as a highly invasive polyphagous Crop Pest and efficient vector of plant viruses. The genome serves as a reference for resolving the B. tabaci cryptic species complex, understanding fundamental biological novelties, and providing valuable genetic information to assist the development of novel strategies for controlling whiteflies and the viruses they transmit.

Daniel K. Hasegawa - One of the best experts on this subject based on the ideXlab platform.

  • The draft genome of whitefly Bemisia tabaci MEAM1, a global Crop Pest, provides novel insights into virus transmission, host adaptation, and insecticide resistance
    BMC Biology, 2016
    Co-Authors: Wenbo Chen, Daniel K. Hasegawa, Patricia Valle Pinheiro, Marcus C. Stensmyr, Adi Kliot, Junbo Luan, Wenli Liu, Yi Zheng, Navneet Kaur, Honghe Sun
    Abstract:

    BackgroundThe whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is among the 100 worst invasive species in the world. As one of the most important Crop Pests and virus vectors, B. tabaci causes substantial Crop losses and poses a serious threat to global food security.ResultsWe report the 615-Mb high-quality genome sequence of B. tabaci Middle East-Asia Minor 1 (MEAM1), the first genome sequence in the Aleyrodidae family, which contains 15,664 protein-coding genes. The B. tabaci genome is highly divergent from other sequenced hemipteran genomes, sharing no detectable synteny. A number of known detoxification gene families, including cytochrome P450s and UDP-glucuronosyltransferases, are significantly expanded in B. tabaci. Other expanded gene families, including cathepsins, large clusters of tandemly duplicated B. tabaci-specific genes, and phosphatidylethanolamine-binding proteins (PEBPs), were found to be associated with virus acquisition and transmission and/or insecticide resistance, likely contributing to the global invasiveness and efficient virus transmission capacity of B. tabaci. The presence of 142 horizontally transferred genes from bacteria or fungi in the B. tabaci genome, including genes encoding hopanoid/sterol synthesis and xenobiotic detoxification enzymes that are not present in other insects, offers novel insights into the unique biological adaptations of this insect such as polyphagy and insecticide resistance. Interestingly, two adjacent bacterial pantothenate biosynthesis genes, panB and panC, have been co-transferred into B. tabaci and fused into a single gene that has acquired introns during its evolution.ConclusionsThe B. tabaci genome contains numerous genetic novelties, including expansions in gene families associated with insecticide resistance, detoxification and virus transmission, as well as numerous horizontally transferred genes from bacteria and fungi. We believe these novelties likely have shaped B. tabaci as a highly invasive polyphagous Crop Pest and efficient vector of plant viruses. The genome serves as a reference for resolving the B. tabaci cryptic species complex, understanding fundamental biological novelties, and providing valuable genetic information to assist the development of novel strategies for controlling whiteflies and the viruses they transmit.

  • the draft genome of whitefly bemisia tabaci meam1 a global Crop Pest provides novel insights into virus transmission host adaptation and insecticide resistance
    BMC Biology, 2016
    Co-Authors: Wenbo Chen, Daniel K. Hasegawa, Patricia Valle Pinheiro, Adi Kliot, Junbo Luan, Navneet Kaur, Marcus C. Stensmyr
    Abstract:

    The whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is among the 100 worst invasive species in the world. As one of the most important Crop Pests and virus vectors, B. tabaci causes substantial Crop losses and poses a serious threat to global food security. We report the 615-Mb high-quality genome sequence of B. tabaci Middle East-Asia Minor 1 (MEAM1), the first genome sequence in the Aleyrodidae family, which contains 15,664 protein-coding genes. The B. tabaci genome is highly divergent from other sequenced hemipteran genomes, sharing no detectable synteny. A number of known detoxification gene families, including cytochrome P450s and UDP-glucuronosyltransferases, are significantly expanded in B. tabaci. Other expanded gene families, including cathepsins, large clusters of tandemly duplicated B. tabaci-specific genes, and phosphatidylethanolamine-binding proteins (PEBPs), were found to be associated with virus acquisition and transmission and/or insecticide resistance, likely contributing to the global invasiveness and efficient virus transmission capacity of B. tabaci. The presence of 142 horizontally transferred genes from bacteria or fungi in the B. tabaci genome, including genes encoding hopanoid/sterol synthesis and xenobiotic detoxification enzymes that are not present in other insects, offers novel insights into the unique biological adaptations of this insect such as polyphagy and insecticide resistance. Interestingly, two adjacent bacterial pantothenate biosynthesis genes, panB and panC, have been co-transferred into B. tabaci and fused into a single gene that has acquired introns during its evolution. The B. tabaci genome contains numerous genetic novelties, including expansions in gene families associated with insecticide resistance, detoxification and virus transmission, as well as numerous horizontally transferred genes from bacteria and fungi. We believe these novelties likely have shaped B. tabaci as a highly invasive polyphagous Crop Pest and efficient vector of plant viruses. The genome serves as a reference for resolving the B. tabaci cryptic species complex, understanding fundamental biological novelties, and providing valuable genetic information to assist the development of novel strategies for controlling whiteflies and the viruses they transmit.

Selvaraj Krishnan - One of the best experts on this subject based on the ideXlab platform.

  • Simulation of climatic change impact on Crop-Pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker)
    Climatic Change, 2015
    Co-Authors: Selvaraj Krishnan, Subhash Chander
    Abstract:

    As climatic change impacts would depend upon complex interactions between climatic and biological factors, Crop simulation models would play an important role in predicting such an impact. Present study thus aimed at simulating climatic change impacts on Crop-Pest interactions through a coupled Crop-Pest model. Based on temperature-dependent development of pink stem borer, Sesamia inferens (Walker) at six constant temperatures viz . , 18, 21, 24, 27, 30, 33 and 35 ± 1 °C, thermal constants for eggs, larvae and pupae were determined as 47.6, 700 and 166.7° days, respectively through a linear model with corresponding lower development thresholds being 13.8, 10.6 and 12.7 °C. Besides, optimum temperature and upper developmental threshold, respectively were found to be 34.6 and 36.2 °C for eggs, 34.5 and 36.4 °C for larvae, and 31.7 and 37.0 °C for pupae of the pink stem borer through a non-linear model. Based on the thermal requirements, and biotic and abiotic mortalities, a mechanistic holometabolous population simulation model for S. inferens was developed and coupled to InfoCrop-rice model. This coupled InfoCrop model could satisfactorily simulate the PSB dynamics and Crop-Pest interactions. Validated model was used to simulate the impacts of climatic change on S. inferens population and rice Crop in accordance with four ‘standard special report on emissions scenarios’, A1, A2, B1 and B2. Simulations revealed that S. inferens population would decline to the extent of 5.82–22.8 % by 2020 and 19.0–42.7 % by 2050 under Delhi conditions. Following decline in Pest population, S. inferens induced yield losses also revealed a declining trend under changed climate. The coupled Crop-Pest model can be easily adapted to diverse agro-environments and applied to simulate the Pest dynamics and Crop losses under location-specific situations.

  • Simulation of climatic change impact on Crop-Pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker)
    Climatic Change, 2015
    Co-Authors: Selvaraj Krishnan, Subhash Chander
    Abstract:

    As climatic change impacts would depend upon complex interactions between climatic and biological factors, Crop simulation models would play an important role in predicting such an impact. Present study thus aimed at simulating climatic change impacts on Crop-Pest interactions through a coupled Crop-Pest model. Based on temperature-dependent development of pink stem borer, Sesamia inferens (Walker) at six constant temperatures viz., 18, 21, 24, 27, 30, 33 and 35 ± 1 °C, thermal constants for eggs, larvae and pupae were determined as 47.6, 700 and 166.7° days, respectively through a linear model with corresponding lower development thresholds being 13.8, 10.6 and 12.7 °C. Besides, optimum temperature and upper developmental threshold, respectively were found to be 34.6 and 36.2 °C for eggs, 34.5 and 36.4 °C for larvae, and 31.7 and 37.0 °C for pupae of the pink stem borer through a non-linear model. Based on the thermal requirements, and biotic and abiotic mortalities, a mechanistic holometabolous population simulation model for S. inferens was developed and coupled to InfoCrop-rice model. This coupled InfoCrop model could satisfactorily simulate the PSB dynamics and Crop-Pest interactions. Validated model was used to simulate the impacts of climatic change on S. inferens population and rice Crop in accordance with four ‘standard special report on emissions scenarios’, A1, A2, B1 and B2. Simulations revealed that S. inferens population would decline to the extent of 5.82–22.8 % by 2020 and 19.0–42.7 % by 2050 under Delhi conditions. Following decline in Pest population, S. inferens induced yield losses also revealed a declining trend under changed climate. The coupled Crop-Pest model can be easily adapted to diverse agro-environments and applied to simulate the Pest dynamics and Crop losses under location-specific situations. Copyright Springer Science+Business Media Dordrecht 2015