Publications by authors named "Sebastian A Espinoza-Ulloa"
Article Synopsis
- Some genes can cross species boundaries while others, related to reproductive barriers, cannot, leading to "genomic islands of speciation."
- High differentiation areas, primarily on the X chromosome, were identified in hybridizing field crickets, thought to indicate restricted gene flow.
- However, our findings showed that these areas do not have the expected high absolute differentiation, with divergence times based on nuclear DNA being much older than those based on mtDNA, challenging the islands model and prompting a reconsideration of gene exchange dynamics.
Article Synopsis
- - The research focuses on the Galapagos sea lion, an endangered species that helps scientists understand ecosystem dynamics in the Galapagos, by analyzing its mitochondrial DNA using advanced sequencing techniques.
- Researchers collected DNA from a fresh scat sample of the sea lion and used the Illumina NextSeq platform for shotgun sequencing, which successfully filtered and assembled a complete mitochondrial genome.
- The study generated a full mitogenome of 16,676 base pairs and confirmed the sea lion's phylogenetic position within a related group of species, providing insight into its evolutionary history dating back 0.65 million years.
Article Synopsis
- - The study investigates the use of root tissues as an alternative source of nucleic acids for genetic studies in palm trees, especially when access to young leaves is limited due to species-specific challenges.
- - It compares DNA quality and concentration between root and leaf tissues, as well as different storage and extraction methods, finding no significant differences between the two tissue sources or extraction techniques.
- - Results indicate that root tissues, particularly when stored in 70% and 90% alcohol, can yield higher concentrations of DNA compared to leaf tissues, suggesting root tissue could enhance sampling in population studies and potentially be applied to other plants facing similar issues.
