Asian-Pacific Aquaculture 2024

July 2 - 5, 2024

Surabaya, Indonesia

IDENTIFICATION OF A POTENTIAL WSSV-RESISTANT SNP AND ITS POSSIBLE APPLICATION TO SELECTION OF WSSV-RESISTANT PACIFIC WHITE SHRIMP Litopenaeus vannamei

Bagus Rahmat Basuki1*, Alimuddin Alimuddin2, Dinar Tri Soelistyowati2, Sri Nuryati2, Wendy Tri Prabowo1

1National Broodstock Centre for Shrimp and Mollusk, Ministry of Marine Affairs and Fisheries, Karangasem, Bali, 80811. Indonesia

2Department of Aquaculture, Faculty of Fisheries and Marine Sciences, IPB University Bogor, West Java, 16680. Indonesia

*) E-mail: bagus.basuki@kkp.go.id



The Pacific white shrimp (Litopenaeus vannamei) is Indonesia’s main export commodity, but its production is constrained by the white spot syndrome virus (WSSV). Selective breeding of disease-resistant broodstock based on single nucleotide polymorphism (SNP) in the anti-lipopolysaccharide factor (ALF) gene is an alternative strategy for solving the disease problem. This study aimed to detect the SNP g.455 A>G in the anti-lipopolysaccharide factor (ALF) shrimp gene, evaluate the correlation of SNP with WSSV-resistance trait, analyze genotype frequencies of the WSSV-resistance population shrimp and analyze the SNP inheritance in the first generation of selected shrimp. A total of 120 individuals from 4 families were used to detect the SNP marker using tetra-primer amplification refractory mutation system-polymerase chain reaction (ARMS-PCR). The correlation of the SNP marker with survival rate (SR) was analyzed using a general linear model (GLM) between genotype frequencies and SR. Genotypic similarities between broodstock and pedigree were analyzed using Chi-square. SNP g.455 A>G was successfully detected using the ARMS-PCR method and had a strong correlation between the marker and SR (p-value of AA = 0.012; AG = 0.359, and GG = 0.001). The resistant population has significantly higher AA genotype frequency. The SNP marker was inherited, so the broodstock and pedigree have the same genotype frequencies according to chi-square analysis (χ2 = 0.46 and p-value = 0.497). These results suggested that the g.455 genotype AA could be selected to produce WSSV-resistant Pacific white shrimp.