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Wang J, Liu S, Tang X, Huang C, Wan K. A chromosome-level genome assembly of the legume pod borer, Maruca vitrata Fabricius (Lepidoptera: Crambidae). Sci Data 2024; 11:1010. [PMID: 39294198 PMCID: PMC11410823 DOI: 10.1038/s41597-024-03854-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Accepted: 09/04/2024] [Indexed: 09/20/2024] Open
Abstract
Maruca vitrata, a significant pest of legumes, impacts food security in Asia and Africa. This study presents a high-quality genome assembly of M. vitrata, utilizing advanced sequencing technologies including Nanopore long-read, MGI short-read, and Hi-C. The genome, totaling 482.3 Mb with a contig N50 of 2.91 Mb, features 41.58% repetitive sequences and encompasses 13,320 protein-coding genes. We performed comparative genomic analyses to affirm the accuracy and completeness of the protein sequences assembled, ensuring the assembly's integrity. Additionally, the annotation of 83 Cytochrome P450 (CYP) genes further confirms the comprehensive nature of the genome assembly and its annotations. This genome assembly not only deepens our understanding of M. vitrata biology but also supports the development of sustainable pest management strategies. This research highlights the importance of genomics in advancing sustainable agricultural solutions through innovative pest management approaches.
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Affiliation(s)
- Jiale Wang
- Institute of Quality Standard and Monitoring Technology for Agro- Products of Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou, Guangdong, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality of Ministry of Agriculture and Rural Affairs of the People's Republic of China, Guangzhou, Guangdong, China
| | - Shuai Liu
- Institute of Quality Standard and Monitoring Technology for Agro- Products of Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou, Guangdong, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality of Ministry of Agriculture and Rural Affairs of the People's Republic of China, Guangzhou, Guangdong, China
| | - Xuemei Tang
- Institute of Quality Standard and Monitoring Technology for Agro- Products of Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou, Guangdong, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality of Ministry of Agriculture and Rural Affairs of the People's Republic of China, Guangzhou, Guangdong, China
| | - Congling Huang
- Institute of Quality Standard and Monitoring Technology for Agro- Products of Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou, Guangdong, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality of Ministry of Agriculture and Rural Affairs of the People's Republic of China, Guangzhou, Guangdong, China
| | - Kai Wan
- Institute of Quality Standard and Monitoring Technology for Agro- Products of Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China.
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou, Guangdong, China.
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality of Ministry of Agriculture and Rural Affairs of the People's Republic of China, Guangzhou, Guangdong, China.
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Mahalle RM, Bosamia TC, Chakravarty S, Srivastava K, Meena RS, Kadam US, Srivastava CP. De Novo Mining and Validating Novel Microsatellite Markers to Assess Genetic Diversity in Maruca vitrata (F.), a Legume Pod Borer. Genes (Basel) 2023; 14:1433. [PMID: 37510337 PMCID: PMC10379186 DOI: 10.3390/genes14071433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/09/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
Maruca vitrata (Fabricius) is an invasive insect pest capable of causing enormous economic losses to a broad spectrum of leguminous crops. Microsatellites are valuable molecular markers for population genetic studies; however, an inadequate number of M. vitrata microsatellite loci are available to carry out population association studies. Thus, we utilized this insect's public domain databases for mining expressed sequence tags (EST)-derived microsatellite markers. In total, 234 microsatellite markers were identified from 10053 unigenes. We discovered that trinucleotide repeats were the most predominant microsatellite motifs (61.53%), followed by dinucleotide repeats (23.50%) and tetranucleotide repeats (14.95%). Based on the analysis, twenty-five markers were selected for validation in M. vitrata populations collected from various regions of India. The number of alleles (Na), observed heterozygosity (Ho), and expected heterozygosity (He) ranged from 2 to 5; 0.00 to 0.80; and 0.10 to 0.69, respectively. The polymorphic loci showed polymorphism information content (PIC), ranging from 0.09 to 0.72. Based on the genetic distance matrix, the unrooted neighbor-joining dendrogram differentiated the selected populations into two discrete groups. The SSR markers developed and validated in this study will be helpful in population-level investigations of M. vitrata to understand the gene flow, demography, dispersal patterns, biotype differentiation, and host dynamics.
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Affiliation(s)
- Rashmi Manohar Mahalle
- Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221005, India
- Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Tejas C Bosamia
- Plant Omics Division, Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, India
| | - Snehel Chakravarty
- Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221005, India
| | - Kartikeya Srivastava
- Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221005, India
| | - Radhe S Meena
- Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221005, India
| | - Ulhas Sopanrao Kadam
- Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Division of Life Science and Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Chandra P Srivastava
- Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221005, India
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Cha WH, Kim B, Lee DW. Functional Analysis of Pheromone Biosynthesis Activating Neuropeptide Receptor Isoforms in Maruca vitrata. Cells 2023; 12:1410. [PMID: 37408245 DOI: 10.3390/cells12101410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/08/2023] [Accepted: 05/15/2023] [Indexed: 07/07/2023] Open
Abstract
Insect sex pheromones are volatile chemicals that induce mating behavior between conspecific individuals. In moths, sex pheromone biosynthesis is initiated when pheromone biosynthesis-activating neuropeptide (PBAN) synthesized in the suboesophageal ganglion binds to its receptor on the epithelial cell membrane of the pheromone gland. To investigate the function of PBAN receptor (PBANR), we identified two PBANR isoforms, MviPBANR-B and MviPBANR-C, in the pheromone glands of Maruca vitrata. These two genes belong to G protein-coupled receptors (GPCRs) and have differences in the C-terminus but share a 7-transmembrane region and GPCR family 1 signature. These isoforms were expressed in all developmental stages and adult tissues. MviPBANR-C had the highest expression level in pheromone glands among the examined tissues. Through in vitro heterologous expression in HeLa cell lines, only MviPBANR-C-transfected cells responded to MviPBAN (≥5 µM MviPBAN), inducing Ca2+ influx. Sex pheromone production and mating behavior were investigated using gas chromatography and a bioassay after MviPBANR-C suppression by RNA interference, which resulted in the major sex pheromone component, E10E12-16:Ald, being quantitatively reduced compared to the control, thereby decreasing the mating rate. Our findings indicate that MviPBANR-C is involved in the signal transduction of sex pheromone biosynthesis in M. vitrata and that the C-terminal tail plays an important role in its function.
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Affiliation(s)
- Wook Hyun Cha
- Department of SmartBio, Kyungsung University, Busan 48434, Republic of Korea
| | - Boyun Kim
- Department of SmartBio, Kyungsung University, Busan 48434, Republic of Korea
| | - Dae-Weon Lee
- Department of SmartBio, Kyungsung University, Busan 48434, Republic of Korea
- Metabolomics Research Center for Functional Materials, Kyungsung University, Busan 48434, Republic of Korea
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Srinivasan R, Tamò M, Subramanian S. The case for integrated pest management in Africa: transition from a pesticide-based approach. CURRENT OPINION IN INSECT SCIENCE 2022; 54:100970. [PMID: 36126875 DOI: 10.1016/j.cois.2022.100970] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 09/05/2022] [Accepted: 09/12/2022] [Indexed: 06/15/2023]
Abstract
Pest management in major cropping systems has long been dominated by chemical pesticides in Africa. Smallholder farmers have perceived pesticides as insurance to protect their crops. Consumers are less aware of pesticide-related food-safety issues, and markets providing economic incentives to producers who adopt alternatives to pesticides have been slow to emerge. Hence, overuse of pesticides has been constantly increasing. Although African countries have a number of pesticide-related policies, they are inadequately implemented. However, significant investment has been made on integrated pest management (IPM) innovations in recent decades. Resistant cultivars, agroecological approaches, biological control, and biopesticides have been developed against key biotic constraints in major cropping systems. They have been adopted at several pilot sites, where significant economic and ecological impacts have been documented. However, concerted efforts are necessary to harmonize policies and regulations across the continent to enhance the availability, accessibility, and affordability of IPM innovations to smallholder farmers.
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Affiliation(s)
| | - Manuele Tamò
- Benin Research Station, International Institute of Tropical Agriculture (IITA), Cotonou, Benin
| | - Sevgan Subramanian
- International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772-00100, Nairobi, Kenya
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Tamò M, Glitho I, Tepa-Yotto G, Muniappan R. How does IPM 3.0 look like (and why do we need it in Africa)? CURRENT OPINION IN INSECT SCIENCE 2022; 53:100961. [PMID: 35961493 DOI: 10.1016/j.cois.2022.100961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 06/15/2023]
Abstract
The concept of Integrated Pest Management (IPM) was introduced sixty years ago to curb the overuse of agricultural pesticides, whereby its simplest version (IPM 1.0) was aiming at reducing the frequency of applications. Gradually, agro-ecological principles, such as biological control and habitat management, were included in IPM 2.0. However, throughout this time, smallholder farmers did not improve their decision-making skills and continue to use hazardous pesticides as their first control option. We are therefore proposing a new paradigm - IPM 3.0 - anchored on 3 pillars: 1) real-time farmer access to decision-making, 2) pest-management options relying on science-driven and nature-based approaches, and 3) the integration of genomic approaches, biopesticides, and habitat-management practices. We are convinced that this new paradigm based on technological advances, involvement of youth, gender-responsiveness, and climate resilience will be a game changer. However, this can only become effective through redeployment of public funding and stronger policy support.
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Affiliation(s)
- Manuele Tamò
- Biorisk Management Facility, International Institute of Tropical Agriculture IITA-Benin, Cotonou, Benin.
| | | | - Ghislain Tepa-Yotto
- Biorisk Management Facility, International Institute of Tropical Agriculture IITA-Benin, Cotonou, Benin
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Unfolding the mitochondrial genome structure of green semilooper (Chrysodeixis acuta Walker): An emerging pest of onion (Allium cepa L.). PLoS One 2022; 17:e0273635. [PMID: 36040876 PMCID: PMC9426943 DOI: 10.1371/journal.pone.0273635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 08/12/2022] [Indexed: 11/19/2022] Open
Abstract
Onion is the most important crop challenged by a diverse group of insect pests in the agricultural ecosystem. The green semilooper (Chrysodeixis acuta Walker), a widespread tomato and soybean pest, has lately been described as an emergent onion crop pest in India. C. acuta whole mitochondrial genome was sequenced in this work. The circular genome of C. acuta measured 15,743 base pairs (bp) in length. Thirteen protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes, and one control region were found in the 37 sequence elements. With an average 395 bp gene length, the maximum and minimum gene length observed was 1749 bp and 63 bp of nad5 and trnR, respectively. Nine of the thirteen PCGs have (ATN) as a stop codon, while the other four have a single (T) as a stop codon. Except for trnS1, all of the tRNAs were capable of producing a conventional clover leaf structure. Conserved ATAGA motif sequences and poly-T stretch were identified at the start of the control region. Six overlapping areas and 18 intergenic spacer regions were found, with sizes ranged from 1 to 20 bp and 1 to 111 bp correspondingly. Phylogenetically, C. acuta belongs to the Plusiinae subfamily of the Noctuidae superfamily, and is closely linked to Trichoplusia ni species from the same subfamily. In the present study, the emerging onion pest C. acuta has its complete mitochondrial genome sequenced for the first time.
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Cha WH, Lee DW. Suppression of pheromone biosynthesis and mating behavior by RNA interference of pheromone gland-specific fatty acyl reductase in Maruca vitrata. INSECT SCIENCE 2022; 29:1135-1144. [PMID: 34971127 DOI: 10.1111/1744-7917.12999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 12/24/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
In moths, various enzymes, such as fatty acid synthases, fatty acyl desaturases, and fatty acyl reductases (FARs), are involved in pheromone biosynthesis. In particular, pheromone gland-specific FAR (pgFAR) plays an important role in converting the functional group from carboxylic to alcohol during pheromone biosynthesis. A novel pgFAR of Maruca vitrata, Mvi-pgFAR, was identified through transcriptome sequencing of its pheromone gland. To investigate the involvement of Mvi-pgFAR in pheromone biosynthesis, Mvi-pgFAR was cloned from the pheromone gland and suppressed by RNA interference (RNAi). Mvi-pgFAR harbored several conserved motifs related to NAD(P)H-binding, N-glycosylation, and adenosine / guanosine triphosphate binding. Phylogenetic analysis revealed that Mvi-pgFAR with other lepidopteran pgFARs formed an independent clade. Mvi-pgFAR was specifically expressed only in the pheromone gland. Quantitative real-time polymerase chain reaction showed that the diurnal expression levels of Mvi-pgFAR in the pheromone gland were the highest at 2 h before the scotophase. After primarily confirming Mvi-pgFAR suppression by RNAi, (E,E)-10,12-hexadecadienal (E10E12-16:Ald), a major sex pheromone component, was quantified by gas chromatography. When Mvi-pgFAR was successfully suppressed, E10E12-16:Ald production was reduced by up to half of that of the control, and the mating rate was subsequently decreased. Our results demonstrate that Mvi-pgFAR downregulation can suppress mating behavior by changing the relative sex pheromone component ratio, suggesting that Mvi-pgFAR can be used as a novel control target.
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Affiliation(s)
- Wook Hyun Cha
- Department of Biosafety, Kyungsung University, Busan, Republic of Korea
| | - Dae-Weon Lee
- Department of Biosafety, Kyungsung University, Busan, Republic of Korea
- Metabolomics Research Center for Functional Materials, Kyungsung University, Busan, Republic of Korea
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Van den Berg J, Greyvenstein B, du Plessis H. Insect resistance management facing African smallholder farmers under climate change. CURRENT OPINION IN INSECT SCIENCE 2022; 50:100894. [PMID: 35247642 DOI: 10.1016/j.cois.2022.100894] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 02/18/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
Changes in climatic conditions affect pest populations and ultimately result in increased pest status and yield losses. While pesticide application is usually the first defensive tool used to control pest species that threaten crop production, genetically modified (GM) crops with insecticidal traits (Bt crops) are becoming more common. The indiscriminate and over use of insecticides, and absence of insect resistance management (IRM) strategies ultimately lead to evolution of resistance against these technologies. IRM faces significant challenges in the African context. In this paper we use examples of cotton, maize, cowpea and tomato pests to illustrate their potential to evolve resistance to insecticides and also highlight the importance of IRM strategies, both with regard to the use of pesticides and the cultivation of Bt cotton, Bt maize and Bt cowpea.
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Affiliation(s)
- Johnnie Van den Berg
- IPM Program, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, 2520, South Africa.
| | - Bianca Greyvenstein
- IPM Program, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, 2520, South Africa
| | - Hannalene du Plessis
- IPM Program, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, 2520, South Africa
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