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Breeding for brown plant hopper resistance in rice: recent updates and future perspectives
Monday, 2024/12/16 | 08:01:22

Muthukumarasamy SriramSwaminathan ManonmaniChellapan GopalakrishnanVenugopal SheelaAravindan ShanmugamK M Revanna SwamyRamalingam Sures

Mol Biol Rep.; 2024 Oct 4; 51(1):1038. doi: 10.1007/s11033-024-09966-9.

Abstract

Rice yield is often threatened by various stresses caused by biotic and abiotic agents. Many biotic stress factors are known to cause crop growth and yield from seedling to maturity. The brown plant hopper (BPH) can potentially reduce the rice yield to an extent of up to 80%. Intensive research efforts in 1972 led to a better understanding of pathogens/insect and host-plant resistance. This resulted in the identification of about 70 BPH-resistant genes and quantitative trait loci (QTLs) from diversified sources including wild germplasm. However, the BPH-resistant improved varieties with a single resistant gene lose the effectiveness of the gene because of the evolution of new biotypes. This review inferred that the level of resistance durable when incorporating multiple 'R' gene combinations when compared to a single gene. Breeding tools like wide hybridization, biparental crosses, marker-assisted introgression, pyramiding, and genetic engineering have been widely employed to breed rice varieties with single or combination of 'R' genes conferring durable resistance to BPH. Many other genes like receptor-like kinase genes, transcriptional factors, etc., were also found to be involved in the resistant mechanisms of 'R' genes. Due to this, the durability of the resistance can be improved and the level of resistance of the 'R' genes can be increased by adopting newer breeding tools like genome editing which hold promise to develop rice varieties with stable resistance.

 

See https://pubmed.ncbi.nlm.nih.gov/39365503/

 

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