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Originally published as Genetics Published Articles Ahead of Print on December 18, 2006.
Genetics, Vol. 175, 907-915, February 2007, Copyright © 2007
doi:10.1534/genetics.106.059972
A Microsatellite Linkage Map of Barramundi, Lates calcarifer
Chun Ming Wang, Ze Yuan Zhu, Loong Chueng Lo, Felicia Feng, Grace Lin, Wen Tong Yang, Jian Li and Gen Hua Yue1
Molecular Population Genetics Group, Temasek Life Sciences Laboratory, National University of Singapore, 117604 Singapore, Republic of Singapore
1 Corresponding author: Molecular Population Genetics Group, Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, 117604 Singapore, Republic of Singapore.
E-mail: genhua{at}tll.org.sg
Barramundi (Lates calcarifer) is an important farmed marine food fish species. Its compact genome (
700 Mb) is among the smallest genomes of food fish species. We established a first-generation genetic linkage map of Barramundi with a mapping panel containing three parents (two males and one female) and 93 progeny. A total of 240 microsatellite markers were mapped into 24 linkage groups. Among these markers, 10 were located in ESTs and known genes. The total lengths of the female and male maps were 873.8 and 414.5 cM with an average marker spacing of 6.20 and 4.70 cM, respectively. Comparing the flanking sequences of the 240 Barramundi microsatellites with the assembled whole-genome sequences of Tetraodon nigrovidiris revealed 55 homologous sequences located in 19 of the 21 chromosomes of T. nigrovidiris. The map will not only enable the mapping of quantitative trait loci, but also provide new resources for understanding the evolution of fish genomes.
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