Ornat C, Verdejo-Lucas S, Sorribas F J
Departament Protecció Vegetal. IRTA. Crta. de Cabrils s/n. 08348 Cabrils, Barcelona, Spain.
Departament d'Agronomia. ESAB. Comte d'Urgell, 197, 08036 Barcelona.
Plant Dis. 2001 Mar;85(3):271-276. doi: 10.1094/PDIS.2001.85.3.271.
A population of Meloidogyne javanica virulent to Mi-gene in tomato was identified in Spain. It reproduced similarly on resistant and susceptible tomato cultivars in the greenhouse, microplots, and in the field. In monoxenic cultures, reproduction of the virulent M. javanica was higher than that of an avirulent population on resistant but not on susceptible tomatoes. The virulent population suppressed tomato yield of both resistant and susceptible tomatoes by 29% in microplots. Initial population density (Pi) was inversely correlated with Pf (final population density)/Pi on both resistant and susceptible tomatoes in the field. A negative correlation was found between Pi and tomato yield for the susceptible but not for the resistant cultivar.
在西班牙鉴定出了对番茄中Mi基因具有毒性的爪哇根结线虫群体。在温室、小区试验和田间，该群体在抗性和感病番茄品种上的繁殖情况相似。在单寄主培养中，有毒性的爪哇根结线虫在抗性番茄上的繁殖率高于无毒群体，但在感病番茄上并非如此。在小区试验中，有毒群体使抗性和感病番茄的产量均降低了29%。在田间，初始种群密度（Pi）与抗性和感病番茄上的Pf（最终种群密度）/Pi呈负相关。对于感病品种，Pi与番茄产量呈负相关，而对于抗性品种则未发现这种相关性。
