Based on the parentage identification results using 4 polymorphic short sequence repeats (SSRs) with both parents known, we assessed the accuracy of parentage identification for a single known parent using the same 4 SSRs and 4 other additional SSRs for 2507 Chinese shrimp Fenneropenaeus chinensis recaptured from Jiaozhou Bay in a 'molecular marker recapture' program. We detected a high variability in the 4 SSR loci EN0033, RS0622, FCKR002, and FCKR013. The 4 polymorphic loci produced a ≥99.99% cumulative exclusion probability for both known parents. We identified 8 parentage relationships with a logarithm (base 10) of odds (LOD) score of ≥3.0. Similar results were obtained when the 4 additional SSR loci were included. The cumulative exclusion probability decreased to 99.42% for a single known parent using the old 4 SSR loci, which enabled detection of 30 and 44 parentage relationships with a ≥3.0 LOD score for known paternity and maternity, respectively. Inclusion of the additional 4 SSR loci raised, the cumulative exclusion probability to ≥99.99%. However, the number of parentage relationships detected with an LOD score of ≥3.0 was reduced to 8 for the groups with known paternity or maternity, similar to the result obtained with both parents known. In this study, the accuracy of single-parent parentage identification using SSR loci was confirmed. Authentic parentage identification with a single known parent should incorporate both the cumulative exclusion probability and LOD score. Our research provides an alternative method for parentage identification in Chinese shrimp.
KEY WORDS: Fenneropenaeus chinensis · Microsatellites · Parentage identification
Resale or republication not permitted without written consent of the publisherAquat Biol 20: [45][46][47][48][49][50][51] 2014 physical tagging methods used for aquatic animals, such as shrimp, fish, and crab, either hurt the tagged individuals or are impractical for large-scale applications. Further, the tagging process is labor-intensive (Soula et al. 2007).The power and accuracy of molecular markers, especially short sequence repeats (SSRs), for individual identification and pedigree tracing have been validated in animals. Bai et al. (2010) successfully traced the pedigree of 61 blue foxes Alopex lagopus based on 15 microsatellite markers and GeneScan techno logy. Qian et al. (2010) demonstrated the accuracy of 10 microsatellite loci in estimating genetic relationships in standard triplet and single parent investigations of Wenshan cattle Bos taurus. Compared with terrestrial species, most aquatic animals are fecund. The filial origin of the larvae is not easy to trace using a physical tag, and thus it is difficult to meet the requirements of breeding programs or marker-recapture assessment in hatchery release . Parentage identification based on molecular markers is a promising approach. In aquatic animals, SSR markers have also been widely used in genetic diversity studies, individual or family tracing, and linkage mapping (Hulak et al. 2010, Rua...