| bioproject id |
PRJEB5920
to NCBI
|
| key word |
food habit transition; MOLECULAR CHARACTERIZATION; EXPRESSION ANALYSIS; ORGAN SIZE; GENE; ZEBRAFISH; IDENTIFICATION; FISH; DUPLICATION; DISCOVERY; SEQUENCE |
| experiment type |
food habit transition |
| publication |
Wang Y et al., "The draft genome of the grass carp (Ctenopharyngodon idellus) provides insights into its evolution and vegetarian adaptation", Nature genetics, 2015; 47(6):625-631. |
| description |
Grass carp is a species of the Cyprinidae family, which is one of most important freshwater food fishes and has great commercial value in the world. In present study, we report a 0.9-Gb draft genome of a gynogenetic female and a 1.07-Gb genome of a wild male adult.Genome annotation identified 32,811 protein-coding gene models. Transcriptome study illuminates resetting of circadian phase in gut and activation of mevalonate pathway and steroid biosynthesis in liver occur during the period of food habit transition from carnivorous to herbivorous. |
| abstract |
The grass carp is an important farmed fish, accounting for similar to 16% of global freshwater aquaculture, and has a vegetarian diet. Here we report a 0.9-Gb draft genome of a gynogenetic female adult and a 1.07-Gb genome of a wild male adult. Genome annotation identified 27,263 protein-coding gene models in the female genome. A total of 114 scaffolds consisting of 573 Mb are anchored on 24 linkage groups. Divergence between grass carp and zebrafish is estimated to have occurred 49-54 million years ago. We identify a chromosome fusion in grass carp relative to zebrafish and report frequent crossovers between the grass carp X and Y chromosomes. We find that transcriptional activation of the mevalonate pathway and steroid biosynthesis in liver is associated with the grass carp's adaptation from a carnivorous to an herbivorous diet. We believe that the grass carp genome could serve as an initial platform for breeding better-quality fish using a genomic approach. |
Gene
RNA