Publications by authors named "Mireille Fargette"
Species delineation in parthenogenetic tropical species of Meloidogyne nematodes is particularly difficult although they are strictly apomictic. In fact, parthenogenesis in Meloidogyne nematodes is a recent phenomenon and the structure of the genetic diversity is mainly explained by crosses prior to the establishment of parthenogenesis. Under such hypothesis, increasing the size of a characterized sample by adding individuals should result in the decrease of the diversity structure.
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- Meloidogyne, a type of plant-parasitic nematode, poses significant risks to agriculture due to its diversity and reproductive methods, necessitating an understanding of their genetic structure and species identification for proper pest management.
- A study comparing mitochondrial and nuclear genetic data revealed distinct maternal lineages and inconsistencies between the two genetic markers, suggesting a complex evolutionary history involving hybridization and recent species formation through parthenogenesis.
- These findings indicate that phenotypic traits may be influenced by ancestral genetic backgrounds, complicating risk management efforts, as identifying nematode species may not accurately predict their impact on agriculture.
A number of different plant parasitic nematode species are found associated with sugarcane in South Africa. Of these, the root-knot nematode (Meloidogyne javanica), the lesion nematode (Pratylenchus zeae) and the dagger nematode (Xiphinema elongatum) are potentially the most damaging pests. Identification and enumeration of the number of these nematodes are necessary for providing advice to farmers as well as studying the effects of various treatments in field and glasshouse trials.
View Article and Find Full Text PDFM. chitwoodi and M. fallax populations are clustered and separated from the other species studied.
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