Journal of Tropical Oceanography ›› 2025, Vol. 44 ›› Issue (3): 141-147.doi: 10.11978/2024175CSTR: 32234.14.2024175

• Marine Biology • Previous Articles     Next Articles

Establishment of parentage assignment techniques in Acanthopagrus latus and its applications in stock enhancement assessment

LU Youjun1(), CHEN Qiang1, HUANG Liangmin1, YOU Songyuan1, LIU Dingyu1, MA Chao2, WU Shuiqing2, LIU Xiande1()   

  1. 1. Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-environment, Fisheries College of Jimei University, Xiamen 361021, China
    2. Fisheries Research Institute of Fujian, Xiamen 361013, China
  • Received:2024-09-11 Revised:2024-10-22 Online:2025-05-10 Published:2025-06-04
  • Contact: LIU Xiande
  • Supported by:
    Science and Technology Planning Project of Fujian Province, China(2023N0011); Project of Fujian Institute of Fisheries(S23311); Open Project of the Fujian Province Key Laboratory of Marine Fisheries Resources and Ecological Environment

Abstract:

To evaluate the stock enhancement effectiveness of Acanthopagrus latus, this study employed highly polymorphic microsatellite markers developed by our research group using the species' genome and established a parentage assignment technology. Based on this, we assessed the stock enhancement effectiveness of A. latus in Xiamen Bay sampled in 2023-2024. The specific findings are as follows: (1) Polymorphic primer screening: from 110 randomly selected microsatellite loci in the A. latus genome, we designed primers and preliminarily screened 9 loci with high polymorphism using a wild A. latus population. (2) Establishment of parentage assignment technology: using known pedigree families of A. latus, including 20 parental fish and 72 offspring, we performed parentage analysis with the 9 selected microsatellite loci. As shown by the results, a total of 145 alleles were detected across the loci, with an average allele number (Na) of 16.11, an average observed heterozygosity (Ho) of 0.788, an average expected heterozygosity (He) of 0.810, and an average polymorphic information content (PIC) of 0.785, indicating high polymorphism. The analysis using the Cervus 3.0.7 software showed that under a 95% confidence level, the parentage assignment success rate was 98.61% when the sex of both parents was known, and 97.22% when the sex was unknown. (3) Stock enhancement evaluation: the parentage assignment technology was applied to 114 released parental fish and 264 recaptured individuals. Among the 264 recaptured A. latus, 8 were identified as offspring of the released parents, indicating a resource contribution rate of 3.03% to the wild A. latus population. The results provide reliable technical methods for future genetic resource identification and stock enhancement evaluation of A. latus.

Key words: Acanthopagrus latus, microsatellite, parentage assignment, stock enhancement

CLC Number: 

  • S931.9