Nguye P. V. auteur aut IRD Tran T. B. auteur aut IRD Nguyen P. T. auteur aut IRD Nguyen L. N. T. auteur aut IRD Bien T. L. T. auteur aut IRD Ton L. B. auteur aut IRD Le T. T. H. auteur aut IRD Ton A. T. auteur aut IRD Nguyen Q. C. B. auteur aut IRD Huynh B. V. auteur aut IRD Le D. D. auteur aut IRD Bellafiore Stéphane auteur aut IRD text journalArticle eng text/pdf born digital access The rice root-knot nematode, Meloidogyne graminicola, is a serious pathogen of rice production worldwide. In Vietnam, scientific information on the rice root-knot nematode is limited. In this circumstance, our study aimed to investigate the characteristics of M. graminicola from rice fields in southern Vietnam and to evaluate the reaction of 20 rice varieties to this soil-borne pathogen in a glasshouse experiment. Ten populations of root-knot nematode collected from rice fields at different geographical regions in the Mekong Delta were identified as M. graminicola based on the perineal configuration of females and species-specific molecular markers. The morphological, morphometric and molecular characteristics of ten nematode isolates were defined, and the variations observed between these isolates were not significantly different. The pathogenicity of these isolates was examined in the susceptible Indica rice, Oryza sativa 'IR64', with a reproduction factor ranging from 18.1 to 37.8. Of the 20 Indica rice varieties tested in response to the nematode population MG-PN08, the 'Tetep' variety showed moderate resistance to the nematode (reproductive factor = 11.7; galling index = 2.4), while others were ranked at levels ranging from moderately susceptible to highly susceptible. The life cycle of M. graminicola in 'Tetep' root is 28 days compared to 21 in 'IR64' ,Tetep-nematode interaction at the histological and molecular levels needs further investigation to develop new rice varieties resistant to rice root-knot nematode. specialized Indica rice 'IR64' Oryza sativa pathogenicity resistance 'Tetep' VIET NAM MEKONG DELTA 076 23 10 1153-1170 2021 1388-5545 https://www.documentation.ird.fr/hor/fdi:010083402 10.1163/15685411-bja10102 1388-5545 [F B010083402] https://www.documentation.ird.fr/hor/fdi:010083402 https://www.documentation.ird.fr/intranet/publi/2022-01/010083402.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2022-01-12 2025-02-24 fdi:010083402 fre