TY - JOUR
T1 - X-treme loss of sequence diversity linked to neo-X chromosomes in filarial nematodes
AU - Mattick, John
AU - Libro, Silvia
AU - Bromley, Robin
AU - Chaicumpa, Wanpen
AU - Chung, Matthew
AU - Cook, Darren
AU - Khan, Mohammad Behram
AU - Kumar, Nikhil
AU - Lau, Yeeling
AU - Misra-Bhattacharya, Shailja
AU - Rao, Ramakrishna
AU - Sadzewicz, Lisa
AU - Saeung, Atiporn
AU - Shahab, Mohd
AU - Sparklin, Benjamin C.
AU - Steven, Andrew
AU - Turner, Joseph
AU - Tallon, Luke J.
AU - Taylor, Mark
AU - Moorhead, Andrew R.
AU - Michalski, Michelle
AU - Foster, Jeremy M.
AU - Hotopp, Julie C.Dunning
PY - 2021/10/27
Y1 - 2021/10/27
N2 - The sequence diversity of natural and laboratory populations of Brugia pahangi and Brugia malayi was assessed with Illumina resequencing followed by mapping to identify single nucleotide variants and insertions/deletions. In natural and laboratory Brugia populations, there is a lack of sequence diversity on chromosome X relative to the autosomes (πX/πA = 0.2), which is lower than the expected πX/πA = 0.75). A reduction in diversity is also observed in other filarial nematodes with neo-X chromosome fusions in the genera Onchocerca and Wuchereria, but not those without neo-X chromosome fusions in the genera Loa and Dirofilaria. In the species with neo-X chromosome fusions, chromosome X is abnormally large, containing a third of the genetic material such that a sizable portion of the genome is lacking sequence diversity. Such profound differences in genetic diversity can be consequential, having been associated with drug resistance and adaptability, with the potential to affect filarial eradication.
AB - The sequence diversity of natural and laboratory populations of Brugia pahangi and Brugia malayi was assessed with Illumina resequencing followed by mapping to identify single nucleotide variants and insertions/deletions. In natural and laboratory Brugia populations, there is a lack of sequence diversity on chromosome X relative to the autosomes (πX/πA = 0.2), which is lower than the expected πX/πA = 0.75). A reduction in diversity is also observed in other filarial nematodes with neo-X chromosome fusions in the genera Onchocerca and Wuchereria, but not those without neo-X chromosome fusions in the genera Loa and Dirofilaria. In the species with neo-X chromosome fusions, chromosome X is abnormally large, containing a third of the genetic material such that a sizable portion of the genome is lacking sequence diversity. Such profound differences in genetic diversity can be consequential, having been associated with drug resistance and adaptability, with the potential to affect filarial eradication.
U2 - 10.1371/journal.pntd.0009838
DO - 10.1371/journal.pntd.0009838
M3 - Article
SN - 1935-2727
VL - 15
SP - e0009838
JO - PLoS Neglected Tropical Diseases
JF - PLoS Neglected Tropical Diseases
IS - 10
M1 - e0009838
ER -