A high-density linkage map and sex-linked markers for the Amazon Tambaqui Colossoma macropomum.

ABSTRACT:

Background

Tambaqui (Colossoma macropomum, Cuvier, 1818) is the most economically important native freshwater fish species in Brazil. It can reach a total length of over 1 m and a weight of over 40 kg. The species displays a clear sex dimorphism in growth performance, with females reaching larger sizes at harvest. In aquaculture, the production of monosex populations in selective breeding programmes has been therefore identified as a key priority.

Results

In the present study, a genetic linkage map was generated by double digest restriction-site associated DNA (ddRAD) sequencing from 248 individuals sampled from two F1 families. The map was constructed using 14,805 informative SNPs and spanned 27 linkage groups. From this, the tambaqui draft genome was improved, by ordering

SUBMITTER: Varela ES 

PROVIDER: S-EPMC8487117 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature