Emerging technological developments to address pest resistance in Bt cotton

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外文摘要：Cotton plays a crucial role in shaping Indian economy and rural livelihoods.The cotton crop is prone to numerous insect pests,necessitating insecticidal application,which increases production costs.The advent of the expression of Bacillus thuringiensis(Bt)insecticidal protein in cotton has significantly reduced the burden of pest without compromising environmental or human health.After the introduction of transgenic cotton,the cultivated area expanded to 22 million hectares,with a 64％increase in adoption by farmers worldwide.Currently,Bt cotton accounts for 93％of the cultivated cotton area in India.However,extensive use of Bt cotton has accelerated resistance development in pests like the pink bollworm.Furthermore,the overreliance on Bt cotton has reduced the use of broad-spectrum pesticides,favouring the emergence of secondary pests with significant challenges.This emphasizes the urgent necessity for developing novel pest management strategies.The high-dose and refuge strategy was initially effective for managing pest resistance in Bt cotton,but its implementation in India faced challenges due to misunderstandings about the use of non-Bt refuge crops.Although gene pyramiding was introduced as a solution,combining mono toxin also led to instances of cross-resistance.Therefore,there is a need for further exploration of biotechnological approaches to manage insect resistance in Bt cotton.Advanced biotechnological strategies,such as sterile insect release,RNA interference(RNAi)-mediated gene silencing,stacking Bt with RNAi,and genome editing using clustered regularly interspaced short palindromic repeats/CRISPR-associated protein(CRISPR-Cas),offer promising tools for identifying and managing resistance genes in insects.Additionally,CRISPR-mediated gene drives and the development of novel biopesticides present potential avenues for effective pest management in cotton cultivation.These innovative approaches could significantly enhance the sustainability and efficacy of pest resistance management in Bt cotton.

外文关键词：

Bt CottonGene pyramidingRNAiModified toxinGenome editingPlant derived insecticidal proteinGene drive

作者：

NAGARAJ Selvarani、RAJASEKARAN Ravikesavan、PALANIAPPAN Jayamani、RANGASAMY Selvakumar、NARAYANASAMY Chitra、NARAYANAN Manikanda Booapathi

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作者单位：

Department of Genetics and Plant Breeding,Centre for Plant Breeding and Genetics(CPBG),Tamil Nadu Agricultural University(TNAU),Coimbatore 641003,India

Centre for Plant Breeding and Genetics,TNAU,Coimbatore 641003,India

Department of Pulses,CPBG,TNAU,Coimbatore 641003,India

Research and Development Centre,Rasi Seeds(P)Ltd.,Salem,Attur 636102,India

Department of Cotton,TNAU,Coimbatore 641003,India

Department of Plant Biotechnology,Centre for Plant Molecular Biology and Biotechnology(CPMB&B),TNAU,Coimbatore 641003,India.

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出版年：

2024

DOI：

10.1186/s42397-024-00192-z

棉花研究(英文)

中国农业科学院棉花研究所,中国农学会

棉花研究(英文)

ISSN：2096-5044

年,卷(期)：2024.7(3)