This document discusses a study on the genetic diversity and population structure of bay scallops in Massachusetts. It outlines that the study developed genetic markers to analyze populations and enhancement efforts. The study found population differences between wild scallops and those in enhancement areas, with most adults self-assigning to their native Chatham population. It also observed private alleles in enhanced populations that were not present originally, showing the effects of enhancement on genetic diversity.

1. Bay scallop genetic diversity
and population structure in
Massachusetts
Steven Roberts
School of Aquatic and Fishery Sciences
University of Washington

2. Outline
•Beginning
• Marker Development
• Populations / Enhancement
• Conclusions

6. NCBI Present Status
Library Characteristics
• ESTs = 7057
Individual clones sequenced
D-hinge 671
• CoreNucleotides = 85
Met 61
Set 932
Adductor 367
Gonad 58
8% sequences <200 bp
• Contigs 845
Average length - 719 bp
970 singletons
217 contigs
• Singletons 2746
• Unique Seqs 3591

14. Enhancement

20. Population Differences
Self-assignment
Only Adults
Random = 11%
Chatham = 60%

26. Assessing Enhancement
private alleles
showing up post
enhancement

27. Summary
• Identify markers that effectively identify
all potential parent populations
• functional markers (SSR-ESTs, SNPs)
• Isolation coupled with life history can
dramatically affect genetic diversity
• Temporal (yearly) variation is interesting
and critical for understanding diversity