Genetic parameters and response to selection in blue mussel (Mytilus galloprovincialis) using a SNP-based pedigree

Nguyen, Thuy T. T., Hayes, Ben J. and Ingram, Brett A. (2014) Genetic parameters and response to selection in blue mussel (Mytilus galloprovincialis) using a SNP-based pedigree. Aquaculture, 420-421 295-301. doi:10.1016/j.aquaculture.2013.11.021


Author Nguyen, Thuy T. T.
Hayes, Ben J.
Ingram, Brett A.
Title Genetic parameters and response to selection in blue mussel (Mytilus galloprovincialis) using a SNP-based pedigree
Formatted title
Genetic parameters and response to selection in blue mussel (Mytilus galloprovincialis) using a SNP-based pedigree
Journal name Aquaculture   Check publisher's open access policy
ISSN 0044-8486
1873-5622
Publication date 2014-01-15
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.aquaculture.2013.11.021
Open Access Status Not yet assessed
Volume 420-421
Start page 295
End page 301
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
In this study, we estimated genetic parameters and realised response to selection in the second generation of a breeding programme of the blue mussel (Mytilus galloprovincialis). A total of 77 full-sib families were produced and reared communally after the fertilisation stage. To assist the reconstruction of a pedigree from these families, a panel of single nucleotide polymorphisms (SNPs) was developed de novo from genomic sequences. A total of 227 out of 432 SNPs were validated. We used only SNPs with polymorphic information content greater than or equal to 0.10 (i.e. 179 SNPs) for family identification. The Bayesian approach using Cervus-type model could assign 92.5% of offspring to the intended parent pairs, which is a significant improvement compared to previously used microsatellites. Likely as a result of both improved parentage assignment and greater depth of pedigree, estimates of heritability of economic traits increased compared to that reported in the first generation. In the second generation, estimates for heritability of total weight (TW), shape (SH), meat yield as ratio between meat weight and total weight (MY1), and meat yield as ratio between meat weight and the sum of meat weight and shell weight (MY2) were 0.35. ±. 0.09, 0.64. ±. 0.10, 0.23. ±. 0.08 and 0.46. ±. 0.10, respectively. Realised selection response (compared to wild-wild matings) from the selection decisions in the first generation of the breeding programme were positive and up to 10%, indicating that further genetic gains can be achieved through this family-based breeding programme.
Keyword Blue mussel
Breeding programme
Genetic parameters
Heritability
Selection response
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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