Genetic diversity of <i>Meloidogyne</i> spp. from rice and identification of multiresistant sources in <i>Oryza</i> spp. accessions

نویسندگان

چکیده

Recently a Meloidogyne species complex was detected parasitizing and causing damage to irrigated rice in southern Brazil, highlighting the need study genetic diversity of these their pathogenicity Oryza spp. order select genotypes with multiple resistance. This compared Brazilian isolates from evaluated reaction four wild accessions (O. glumaepatula, O. longistaminata, grandiglumis, alta) two cultivated species, glaberrima sativa (control) M. ottersoni, oryzae, variants graminicola (Est G2 Est G3). Genetic variability assessed using RAPD AFLP markers. ottersoni showed high intraspecific variability: 83.76% 41.14%, respectively. Cluster analysis clear separation among root-knot nematodes (RKNs) into subclades according esterase phenotypes 100% bootstrap. For resistance screening, plants were inoculated 5,000 eggs, nematode reproduction factor 90–120 days postinoculation. an American highly resistant or all RKNs tested is valuable source Overall, other also different levels Conversely, longistaminata exhibited low G3 most aggressive isolate. Sources against RKN genotypes, especially AA genome like may be great interest for future breeding programmes rice.

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ژورنال

عنوان ژورنال: Plant Pathology

سال: 2021

ISSN: ['0032-0862', '1365-3059']

DOI: https://doi.org/10.1111/ppa.13438