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Association between single nucleotide polymorphisms of nLvALF1 and PEN2-1 genes and resistance to Vibrio parahaemolyticus in the Pacific white shrimp Litopenaeus vannamei

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Aquaculture and Fisheries 2022年第4期7卷 373-381页

作者： Pawapol Kongchum suphavadee chimtong Naparat Prapaiwong Faculty of Animal Sciences and Agricultural Technology Silpakorn UniversityPhetchaburi CampusCha-amPhetchaburi76120Thailand Samut Sakhon Coastal Aquaculture Research and Development Center MueangSamut Sakhon74000Thailand

Vibrio parahaemolyticus carrying a plasmid encoding the PirAvp and PirBvp toxins is the causative agent of acute hepatopancreatic necrosis disease(AHPND)in penaeid *** the Pacific white shrimp farming industry,one possible strategy to reduce economic loss due to AHPND is the development of a shrimp line resistant to the *** this study,we identified single nucleotide polymorphisms(SNPs)in the Litopenaeus vannamei anti-lipopolysaccharide factor 1(nLvALF1)and penaeidin 2-1(PEN2-1)genes,and we analyzed the associations between these SNPs and resistance/susceptibility to *** infection in the Pacific white ***(PL20)shrimp from a local hatchery in Prachuap Khiri Khan Province were challenged with an isolate of VPAHPND and mortality was observed for 14 *** was extracted from susceptible(died within 6 days)and resistant(survived the challenge)shrimp(45 individuals/group)and used for PCR amplifications of nLvALF1(397 bp)and PEN2-1(637 bp)gene *** products were sequenced by direct sequencing and SNPs were identified from sequencing *** and seven SNPs were identified in nLvALF1 and PEN2-1 gene fragments,*** of allele frequencies in susceptible and resistant samples using Chi-square tests revealed that four and six SNPs in nLvALF1 and PEN2-1,respectively,were associated with resistance/susceptibility to *** infection(P<0.05).The SNPs in the candidate genes identified here are potential DNA markers for breeding ***-resistant Pacific white shrimp in the study population;however,further validation will be required if these SNPs are to be used across populations.

关键词： Single nucleotide polymorphisms Anti-lipopolysaccharide factor Penaeidin Early mortality syndrome Acute hepatopancreatic necrosis disease

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