RNA sequencing Feed switch- Liver and Gut

Salmon farming in the future must navigate conflicting and shifting demands of sustainability, shifting feed prices, disease, and product quality. The industry needs to develop a flexible, integrated basis of knowledge for rapid response to new challenges. The Digital Salmon will be an ensemble of mathematical descriptions of salmon physiology, combining mathematics, high-dimensional data analysis, computer science and measurement technology with genomics and experimental biology into a concerted ...

Salmon farmed on modern feeds contains less of the healthy, long-chain fatty acids (EPA and DHA) than before. Up until the turn of the millennium, farmed salmon were fed fish oil as a replacement for their omega-3 rich natural prey. However, fish oil is now a scarce resource, and more than half of the fat in modern feeds comes from plant oils that are inexpensive, but devoid of long-chain omega-3 fatty acids. How can we increase the omega-3 content of salmon on sustainable feeds?

One option is ...

Atlantic salmon is a main source of essential ω-3 long-chain polyunsaturated fatty acids (LC-PUFA) in many Western diets, especially eicosapentaenoic acid (20:5n-3, EPA) and docosahexaenoic acid (22:6n-3, DHA). However, farmed salmon meat now contains less healthy ω-3 fatty acids (FA) than before, due to the shift from marine to vegetable lipid feed sources. An important future aquaculture challenge is therefore to maintain a healthy and high EPA/DHA content when farmed salmon is fed a vegetable ...

This experiment is designed to pinpoint where in the metabolic network there are differences between salmon of different genetic families and on different diets. Analyses of this material will help inform feeding and breeding strategies.

Salmon will be reared on feeds with contrasting levels of very-long-chain polyunsaturated fatty acids. Then some fish will be crossed over to the other diet while others remain as controls. This perturbation of diet should provoke changes in omega-3 metabolism ...

CPM is a descriptive measures for the expression level of a gene.

Information for salmon genes, including transcript length used for calculating transcrip per million (TPM) value

Read counts for each sample

FPKMs or Fragments Per Kilobase of exon per Million reads . Fragment means fragment of DNA, so the two reads that comprise a paired-end read count as one. Per kilobase of exon means the counts of fragments are then normalized by dividing by the total length of all exons in the gene (or transcript). This bit of magic makes it possible to compare Gene A to Gene B even if they are of different lengths. Per million reads means this value is then normalized against the library size. This bit of magic ...

Column 1: Row numbers Column 2: Sample id (See below) Column 3: Water (Fish from salt water or fresh water) Column 4: Tissue (Liver or Gut) Column 5: Feed (MA- Marine oil, VO- Vegetable oil) Column 6: Day Column 7: Count file location

Column 2 explained: The freshwater fish have no tank numbers and saltwater fish do have tank numbers eg : 69-D0-MA-G-1 - > 69 well position (id given when sequncing), Day 0, Marine oil, Gut, Fish number 1 147-D16-VO-MA-L-6 -> 147 well position, Day 16, Vegetable ...

Information on samples submitted for RNAseq

Rows are individual samples

Columns are: ID Sample Name Date sampled Species Sex Tissue Geographic location Date extracted Extracted by Nanodrop Conc. (ng/µl) 260/280 260/230 RIN Plate ID Position Index name Index Seq Qubit BR kit Conc. (ng/ul) BioAnalyzer Conc. (ng/ul) BioAnalyzer bp (region 200-1200) Submission reference Date submitted Conc. (nM) Volume provided PE/SE Number of reads Read length

A list of interesting lipid genes

FPKMs or Fragments Per Kilobase of exon per Million reads . Fragment means fragment of DNA, so the two reads that comprise a paired-end read count as one. Per kilobase of exon means the counts of fragments are then normalized by dividing by the total length of all exons in the gene (or transcript). This bit of magic makes it possible to compare Gene A to Gene B even if they are of different lengths. Per million reads means this value is then normalized against the library size. This bit of magic ...

Read counts for each sample

Source: Tom Harvey [E- mail from Jon Olav 19 May 2016]

Use this template when you upload RNA sequencing data. Email : 31 May 2016 More columns need to be added PE/SE etc?