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Title: Neurospora discreta : Neurospora discreta Raw sequence reads      
keywords:
raw sequence reads
ID:
PRJNA295117
description:
Previous population genomic studies provided insights into the environmental factors that may be driving lineage divergence in Neurospora. They also evidenced divergence-with-gene-flow of Neurospora populations and an important role of genomic novelties of trans-specific origin as sources of adaptive change. Ellison et al. (2011) discovered two cryptic and recently diverged populations of N. crassa, endemic to Louisiana and the Caribbean basin, and genome scans revealed at least two ‘islands’ of extreme divergence between them, with growth-rate assays suggesting that divergence islands may be the result of local adaption to latitudinally distinct environments, an hypothesis validated by gene deletion. Analyses also suggested that the divergent haplotype observed at one of the islands of divergence in the Louisiana population has been introgressed from another, unknown, Neurospora species. Phylogenomics of mating type chromosomes also revealed the existence of large introgression tracts in three phylogenetic lineages of the selfing species Neurospora tetrasperma, and analyses showed that the introgression likely originated from two closely related outcrossing species (Strandberg et al. 2010; Sun et al. 2012). To extend these findings, and to address their universality, we conducted a population genomic study of another species of Neurospora: the Phylogenetic Species 4 of the N. discreta species complex (=PS4). This species has the greatest latitudinal distribution of any Neurospora species, from central Africa, through Europe and western North America, as far north as Alaska (Dettman et al. 2006). The broad distribution of PS4, and the frequent coexistence of multiple N. discreta phylogenetic species in sympatry make them ideal systems to study the general processes involved in the build up or maintenance of population differentiation. We used deep-coverage, and genome-scale DNA sequence data from 52 genomes of PS4 and experimental measures of reproductive isolation to address the following questions: What is the population structure? What is the genealogical history of population subdivision? What are the genome-wide patterns of divergence? What is the degree and genomic distribution of gene flow between related lineages? What is the degree of reproductive isolation between lineages caused by intrinsic prezygotic barriers and intrinsic early post-zygotic barriers? What is the degree and genomic distribution of introgression from other lineages? What are the genomic features harboring signatures of recent selective sweeps?
accesstypes:
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landingpage: http://www.ncbi.nlm.nih.gov/bioproject/PRJNA295117
authentication:
none
authorization:
none
name:
Neurospora discreta
ncbiID:
ncbitax:29879
abbreviation:
NCBI
homePage: http://www.ncbi.nlm.nih.gov
ID:
SCR:006472
name:
National Center for Biotechnology Information
homePage: http://www.ncbi.nlm.nih.gov/bioproject
ID:
SCR:004801
name:
NCBI BioProject

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