Diversity of Meloidogyne spp. from peri-urban areas of sub-Saharan Africa and their genetic similarity with populations from the Latin America

Publication date: Available online 21 September 2018Source: Physiological and Molecular Plant PathologyAuthor(s): Marcilene F.A.dos Santos, Vanessa da Silva Mattos, Jessica M.S. Monteiro, Maria R.A. Almeida, Aldemiro S. Jorge, Juvenil E. Cares, Philippe Castagnone Sereno, Danny Coyne, Regina.M.D.G. CarneiroAbstractIn Africa, peri-urban vegetable production systems supply perishable vegetables to the rapidly expanding urban centers. These highly intensive systems are characterized by high levels of pests and diseases and an excessive use of synthetic pesticides to reduce their population densities. Root-knot nematodes (RKN) are especially prevalent in these systems but are often not recognized, or diagnosed correctly. The limited ability to accurately identify these pathogens likely results in the inappropriate use and misuse of control measures, such as genetic resistance, crop rotation, or synthetic chemicals. Given the perceived importance of RKN, a species characterization study was conducted in peri-urban vegetable (amaranthus, cabbage, capsicum pepper, carrot, cassava, eggplant, okra, tomato) fields and some coffee plantations, in Benin, Kenya, Nigeria, Tanzania and Uganda. Meloidogyne spp. were characterized from 143 field samples using esterase phenotypes (EST) and SCAR markers. Five known species were identified: three phenotypes for M. javanica populations (EST J3, Rm: 1.0, 1.25, 1.4; EST J2a, Rm: 1.0, 1.4; EST J2b, Rm: 1.0, 1.25), two for M. incognita (EST I1, Rm: 1...
Source: Physiological and Molecular Plant Pathology - Category: Molecular Biology Source Type: research