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Onivaldo Randig Frédéric Leroy Philippe Castagnone-Sereno 《European journal of plant pathology / European Foundation for Plant Pathology》2001,107(6):639-643
Random amplified polymorphic DNA fingerprinting was performed on single females of root-knot nematodes, Meloidogyne spp., using a new procedure for DNA isolation. One-fourth of the total DNA amount isolated from a single female proved to be sufficient as a template in a polymerase chain reaction. Electrophoretic patterns of the amplified fragments were reproducible between replicates from a single female or sister females from the same progeny, and identical to those obtained with genomic DNA purified from a large number of nematodes. Moreover, a comparative analysis over three successive generations showed stability of the amplification patterns, thus demonstrating the utility of this procedure for epidemiological and ecological studies on root-knot nematodes. 相似文献
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Onivaldo Randig Florence Deau Marcilene F. A. dos Santos Myrian S. Tigano Regina M. D. G. Carneiro Philippe Castagnone-Sereno 《European journal of plant pathology / European Foundation for Plant Pathology》2009,125(3):485-495
The root-knot nematode (RKN) Meloidogyne mayaguensis is considered as one of the most damaging RKN species because of its extremely wide host range. Recent surveys have shown
the rapid spread of this parasite in agro-ecosytems, often making crop cultivation not viable in the heavily infested areas.
Here, we report the identification, molecular cloning, genomic organisation and sequence analysis of a new satellite DNA (satDNA)
family from M. mayaguensis (named pMmPet). It is comprised of two groups of A+T rich, tandemly repeated units of 174 and 180 bp, respectively. Using
these sequences as targets, hybridisation and PCR experiments performed on a wide collection of 44 populations belonging to
15 RKN species showed that the pMmPet family could only be detected in the 16 M. mayaguensis populations tested. In addition, because of their repetitive nature, positive detection of pMmPet sequences was achieved
in single individual nematodes. Therefore, the repeated sequence described here possesses features that make it an excellent
candidate for use as a specific and extremely sensitive tool for the accurate detection and identification of this invasive
pest on a routine basis. Clearly, monitoring the occurrence and spread of M. mayaguensis at the domestic and international levels are needed to avoid wholesale loss of agricultural resources in the infested regions. 相似文献
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