Conclusions
In this study we explored the genetic diversity, population structure,
and host differentiation of 95 individuals from 10 populations ofO. crenata collected from different locations and crop
hosts in Algeria using GBS derived markers. A set of 8,004 high-quality
SNPs was generated for the genetic diversity analyses. The study
revealed low to moderate genetic differentiation between close and
geographically separated populations, respectively. Population
differentiation by geographic distance was more evident across crop
hosts as supported by phylogenetic and clustering analyses. Four genetic
pools were differentiated, clustered according to crop hosts. AT and BM
(Blida-Mouzaia) populations were shown to be spatially and genetically
isolated. This study suggests that O. crenata populations in
Algeria are adapting locally and that host specificity could arise in
some populations.