Abstract:
:ABSTRACT Meloidogyne chitwoodi and M. fallax are serious pests of potato, and both species have been recently designated as quarantine organisms in the European Community and in Canada. The sympatric and less damaging species M. hapla is often found associated with both of them under temperate climates. Here, we describe the use of satellite DNA (satDNA) sequences previously isolated from these three root-knot nematode species for the development of specific diagnostic procedures. In dot-blot experiments, it was unambiguously possible to separate M. chitwoodi and M. fallax from M. hapla using satDNA monomers as probes. In squash-blot experiments, satDNAs allowed discrimination between single individuals of M. chitwoodi or M. fallax from M. hapla, even within root tissues, without the need for DNA purification. The same results were obtained with radioactive or digoxigenin-labeled probes with no loss of sensitivity in detection. M. fallax and M. chitwoodi could not be distinguished. From this study, it is concluded that such cloned satDNA sequences may constitute a powerful tool for the identification and management of Meloidogyne spp. populations in the field and for the implementation of quarantine regulations against these pests.
journal_name
Phytopathologyjournal_title
Phytopathologyauthors
Castagnone-Sereno P,Leroy F,Bongiovanni M,Zijlstra C,Abad Pdoi
10.1094/PHYTO.1999.89.5.380subject
Has Abstractpub_date
1999-05-01 00:00:00pages
380-4issue
5eissn
0031-949Xissn
1943-7684journal_volume
89pub_type
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