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Transcriptome analysis reveals genes associated with late blight resistance in potato
Nisha Bhatia1,2, Jagesh Kumar Tiwari3,4, Chandresh Kumari2
1ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India.
Scientific Reports
|July 5, 2024
Summary
This study identified key genes, including CC-NBS-LRR proteins and MYB transcription factors, that confer late blight resistance in potato. These findings aid in developing better disease management strategies for this vital crop.
Area of Science:
- Plant Pathology
- Genomics
- Molecular Biology
Background:
- Late blight, caused by *Phytophthora infestans*, poses a significant threat to global potato production.
- Understanding the genetic basis of potato resistance is crucial for developing durable disease management strategies.
Purpose of the Study:
- To identify and characterize genes associated with late blight resistance in potato using RNA sequencing.
- To explore the functional roles of differentially expressed genes (DEGs) in conferring resistance.
Main Methods:
- RNA sequencing (RNA-seq) was performed on potato somatic hybrids and varieties after artificial inoculation with *Phytophthora infestans*.
- Differentially expressed genes (DEGs) were identified, functionally annotated using Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathways.
- Sequence diversity and motif analysis were conducted, and key genes were validated using real-time quantitative polymerase chain reaction (RT-qPCR).
Main Results:
- Transcriptome analysis revealed numerous up-regulated and down-regulated DEGs in resistant potato genotypes.
- Key resistance-associated genes identified include CC-NBS-LRR proteins, ankyrin repeat family proteins, cytochrome P450, leucine-rich repeat family proteins, and MYB transcription factors.
- Sequence analysis showed variations and conserved motifs in resistance genes, and gene expression markers for resistance were developed.
Conclusions:
- The study elucidates the genetic mechanisms underlying late blight resistance in potato.
- Identified genes and developed markers provide valuable resources for breeding resistant potato varieties and improving disease management strategies.
