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Resistance of macadamia walnut against Meloidogyne enterolobii and Meloidogyne javanica
Phytoparasitica ( IF 1.4 ) Pub Date : 2020-05-26 , DOI: 10.1007/s12600-020-00808-5
M. G. S. Costa , M. J. D. M. Garcia , M. J. Perdoná , S. R. S. Wilcken

Nematodes of the genus Meloidogyne are included amongst the main plant pathogens of various worldwide economical important crops. Despite the expansion of macadamia walnut crop in various Brazilian regions, studies regarding the parasitism by this genus of nematode are still scarce. The objective of this study was to evaluate the response of progenies from seven varieties of macadamia walnut (HAES 344, HAES 660, HAES 816, IAC 4-12B, IAC 9–20, IAC 4–20 and Aloha 10–14,) against Meloidogyne enterolobii and M. javanica; and to study the life cycle of these nematodes in ‘Aloha 10–14’ which is the most commonly rootstock variety in Brazil. In the response experiment each macadamia walnut plant was inoculated with approximately 5,000 eggs and juveniles of each species of nematode. ‘Rutgers’ tomatoes were used as control treatment. The experiment was set in a completely random design with eight treatments and five replicates for each nematode species. Evaluation of the index of galls, index of egg masses and reproduction factor of the nematode were performed 120 days after inoculation. To study the life cycle of M. enterolobii and M. javanica in ‘Aloha 10–14’ variety, each plant was separately infested with 300 juvenile nematodes. The experiment was performed in B.O.D. chamber at 26 °C. The experiment was set in a completely random design with four treatments and four replicates. Evaluations were accomplished 5, 15, 25 and 35 days after inoculation. All progenies form the seven macadamia walnut varieties showed high level of resistance against M. enterolobii and M. javanica.

中文翻译:

澳洲坚果对肠根结线虫和爪哇根结线虫的抗性

根结线虫属的线虫包括在世界范围内各种重要经济作物的主要植物病原体中。尽管巴西各个地区的澳洲坚果种植面积有所扩大,但关于这种线虫属寄生的研究仍然很少。本研究的目的是评估 7 个澳洲坚果品种(HAES 344、HAES 660、HAES 816、IAC 4-12B、IAC 9-20、IAC 4-20 和 Aloha 10-14)的后代对Meloidogyne enterolobii 和 M. javanica; 并研究这些线虫在 'Aloha 10-14' 中的生命周期,这是巴西最常见的砧木品种。在响应实验中,每个澳洲坚果植物都接种了大约 5,000 个线虫的卵和每种线虫的幼虫。'Rutgers'番茄用作对照处理。实验设置为完全随机设计,每个线虫物种有 8 个处理和 5 个重复。接种后120天对线虫的瘿指数、卵块指数和繁殖因子进行评价。为了研究 'Aloha 10-14' 品种中 M. enterolobii 和 M. javanica 的生命周期,每株植物分别感染了 300 条幼年线虫。实验在 26 °C 的 BOD 室中进行。试验采用完全随机设计,有四个处理和四个重复。在接种后 5、15、25 和 35 天完成评估。七个澳洲坚果核桃品种的所有后代都对 M. enterolobii 和 M. javanica 表现出高水平的抗性。接种后120天对线虫的瘿指数、卵块指数和繁殖因子进行评价。为了研究 'Aloha 10-14' 品种中 M. enterolobii 和 M. javanica 的生命周期,每株植物分别感染了 300 条幼年线虫。实验在 26 °C 的 BOD 室中进行。试验采用完全随机设计,有四个处理和四个重复。在接种后 5、15、25 和 35 天完成评估。七个澳洲坚果核桃品种的所有后代都对 M. enterolobii 和 M. javanica 表现出高水平的抗性。接种后120天对线虫的瘿指数、卵块指数和繁殖因子进行评价。为了研究 'Aloha 10-14' 品种中 M. enterolobii 和 M. javanica 的生命周期,每株植物分别感染了 300 条幼年线虫。实验在 26 °C 的 BOD 室中进行。试验采用完全随机设计,有四个处理和四个重复。在接种后 5、15、25 和 35 天完成评估。七个澳洲坚果核桃品种的所有后代都对 M. enterolobii 和 M. javanica 表现出高水平的抗性。每株植物分别感染了 300 条幼年线虫。实验在 26 °C 的 BOD 室中进行。试验采用完全随机设计,有四个处理和四个重复。在接种后 5、15、25 和 35 天完成评估。七个澳洲坚果核桃品种的所有后代都对 M. enterolobii 和 M. javanica 表现出高水平的抗性。每株植物分别感染了 300 条幼年线虫。实验在 26 °C 的 BOD 室中进行。试验采用完全随机设计,有四个处理和四个重复。在接种后 5、15、25 和 35 天完成评估。七个澳洲坚果核桃品种的所有后代都对 M. enterolobii 和 M. javanica 表现出高水平的抗性。
更新日期:2020-05-26
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