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The study investigates the genetic diversity of Caenorhabditis tropicalis and how it is influenced by geographic factors.

July 30, 2026Genetics

Global genomic diversity of the selfing nematode Caenorhabditis tropicalis correlates with geography

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The study investigates the genetic diversity of Caenorhabditis tropicalis and how it is influenced by geographic factors.
Collected 785 wild strains of Caenorhabditis tropicalis
Sequenced genomes and identified 622 distinct genotypes (isotypes)
Analyzed the correlation of genetic relatedness with geography and niche influences.
C. tropicalis shows substantial geographic association in genetic relatedness with higher diversity in Pacific populations
Identified hyper-divergent regions (HDRs) that are less than 6% of the genome but contain 73% of the variant sites
No evidence of transcontinental selective sweeps among isotypes.

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Randomized trial explores genetic variation in Caenorhabditis tropicalis, suggesting geographical impact on diversity.

Wang et al. (2026) studied this question.

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