Unconfigured Ad

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts
  • jpac1984
    Junior Member
    • Jul 2018
    • 1

    ddRAD project suggestions and comments

    Hi Folks,
    I am interested in doing population genomic analysis using Stacks for a species with a reference genome. My plan is to use a lane of HiSeq 4000 to multiplex around 300 individuals.
    Since a lane of HiSeq 4000 generates over 320 - 390M reads, a 300 plex will mean 1.16 M reads per individual (350M reads). Then, I assumed the following parameters: 1 SNP every 1000 bps, coverage of 30X and an average read length of 120 (paired-end read of 60 bp for each side). With those parameters, I will get ~ 4666 SNPs.

    I have used the R Package SimRAD to select the best RE combinations that will get me around that N of SNPs- I AM VERY LUCKY THAT MY ORGANISM HAS A SEQUENCED GENOME. EcoRI and HindIII will get me around ~4K Snps using a size selection range of 150-300 bps.

    Generating around 100 -120 GB of data brings me some bold/hard concerns: how much computer power do I need for each dataset?
    On the protocol: Deriving genotypes from RAD-seq short-read data using Stacks, the Hardware and software SECTION says: "Access to a computing cluster running under Linux, preferably with at least 8–16 cores and 64-Gb of memory...". This is why I am concerned of perhaps not having enough resources to run the analysis.

    I will appreciate any suggestions or tips you may have for my project. I am seeing that projects based on RAD-seq have a strong component of computer resources. Thus, I am looking for any advice to maximize the probability of success! and not miss important aspects that I am not aware of.

    Thank you very much!

Latest Articles

Collapse

  • SEQadmin2
    Advanced Sequencing Platforms Tackle Neuroscience’s Toughest Genomics Problems
    by SEQadmin2



    Genomics studies in neuroscience face a special challenge due to the brain’s complexity and scarcity of samples. Mapping changes in cell type and state using conventional next-generation sequencing methods remains challenging. Advances in technologies like single-cell sequencing, spatial transcriptomics, and long-read sequencing have opened the door to deeper studies of the brain and diseases like Alzheimer’s, amyotrophic lateral sclerosis (ALS), and schizophrenia.
    ...
    07-09-2026, 11:10 AM
  • SEQadmin2
    Cancer Drug Resistance: The Lingering Barrier to Rising Survival
    by SEQadmin2



    Cancer survival rates have significantly increased in the last few decades in the United States, reaching a combined 70% 5-year survival rate by 2021. Behind this number, there are years of research to find new therapies, drug targets, and early detection methods. But there is one core challenge that keeps slowing down these advances, and it’s about drug resistance.

    There is no single reason why many patients don’t respond to treatment as expected. Cancer is...
    07-08-2026, 05:17 AM
  • GATTACAT
    Reply to Nine Things a Sample Prep Scientist Thinks About Before Sequencing
    by GATTACAT
    Love this - good data definitely starts from good input, and poor input can only give relatively poor data. I particularly like the mention of Nanodrop/absorbance based methods for quantification. It's such a toss up if you'll get an accurate reading or what amounts to a randomly generated number, and a lot of library/sequencing related issues can be traced back to poor quant.
    07-01-2026, 11:43 AM

ad_right_rmr

Collapse

News

Collapse

Topics Statistics Last Post
Started by SEQadmin2, 07-13-2026, 10:26 AM
0 responses
18 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 07-09-2026, 10:04 AM
0 responses
30 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 07-08-2026, 10:08 AM
0 responses
16 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 07-07-2026, 11:05 AM
0 responses
34 views
0 reactions
Last Post SEQadmin2  
Working...