Premium
A gene‐based SNP linkage map for pacific white shrimp, Litopenaeus vannamei
Author(s) -
Du Z.Q.,
Ciobanu D. C.,
Onteru S. K.,
Gorbach D.,
Mileham A. J.,
Jaramillo G.,
Rothschild M. F.
Publication year - 2010
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/j.1365-2052.2009.02002.x
Subject(s) - litopenaeus , shrimp , biology , genetics , linkage disequilibrium , daphnia pulex , single nucleotide polymorphism , snp , gene , fishery , genotype , daphnia , crustacean
Summary Pacific white shrimp ( Litopenaeus vannamei ) are of particular economic importance to the global shrimp aquaculture industry. However, limited genomics information is available for the penaeid species. We utilized the limited public information available, mainly single nucleotide polymorphisms (SNPs) and expressed sequence tags, to discover markers for the construction of the first SNP genetic map for Pacific white shrimp. In total, 1344 putative SNPs were discovered, and out of 825 SNPs genotyped, 418 SNP markers from 347 contigs were mapped onto 45 sex‐averaged linkage groups, with approximate coverage of 2071 and 2130 c m for the female and male maps, respectively. The average‐squared correlation coefficient ( r 2 ), a measure of linkage disequilibrium, for markers located more than 50 c m apart on the same linkage group, was 0.15. Levels of r 2 increased with decreasing inter‐marker distance from ∼80 c m , and increased more rapidly from ∼30 c m . A QTL for shrimp gender was mapped on linkage group 13. Comparative mapping to model organisms, Daphnia pulex and Drosophila melanogaster , revealed extensive rearrangement of genome architecture for L. vannamei , and that L. vannamei was more related to Daphnia pulex . This SNP genetic map lays the foundation for future shrimp genomics studies, especially the identification of genetic markers or regions for economically important traits.