Rich J R, Olson S M
J Nematol. 1999 Dec;31(4S):715-8.
Three field trials were conducted to determine response of Meloidogyne javanica to tomato cultivars containing the Mi gene for resistance in sequential tests. Trials were conducted in spring and fall 1997 and spring 1998 on the same site. Tomatoes were grown on polyethylene mulch at a site initially treated with methyl bromide and then infested with M. javanica via drip tubing. Cultivars with the Mi gene were 'PSR 8991994' and 'Sanibel', and susceptible cultivars were 'Colonial' and 'Agriset 761'. The resistant cultivars greatly suppressed root galling in the three tests. Population densities of second-stage juveniles also were low in soil samples collected from resistant cultivars. Tomato fruit yields were significantly increased in only one test when using resistant cultivars. However, the susceptible cultivars are high-yielding and recommended for north Florida production, while the cultivars containing the Mi gene are not as well adapted. In the three successive crops, no evidence of resistance-breaking biotypes of M. javanica was observed. With further incorporation into adapted cultivars, the Mi gene resistance could be a valuable tool to manage M. javanica in north Florida stake tomato production.
进行了三项田间试验，以通过连续测试确定爪哇根结线虫对含有Mi抗性基因的番茄品种的反应。试验于1997年春季和秋季以及1998年春季在同一地点进行。番茄种植在聚乙烯地膜上，该地点最初用溴甲烷处理，然后通过滴灌管接种爪哇根结线虫。含有Mi基因的品种为“PSR 8991994”和“Sanibel”，感病品种为“Colonial”和“Agriset 761”。在三项测试中，抗性品种极大地抑制了根结形成。从抗性品种采集的土壤样本中，二龄幼虫的种群密度也很低。使用抗性品种时，仅在一次测试中番茄果实产量显著增加。然而，感病品种高产，推荐用于佛罗里达州北部的生产，而含有Mi基因的品种适应性较差。在连续三季作物中，未观察到爪哇根结线虫抗性突破生物型的证据。随着进一步融入适应性品种，Mi基因抗性可能成为佛罗里达州北部立柱式番茄生产中管理爪哇根结线虫的宝贵工具。
