Woodford Pathology Farm, Sugar Research Australia, Woodford, Queensland, Australia.
School of Agriculture and Food Sciences, University of Queensland, Gatton, Queensland, Australia.
Plant Dis. 2019 Sep;103(9):2288-2294. doi: 10.1094/PDIS-02-19-0385-RE. Epub 2019 Jul 8.
Root-lesion nematode () and root-knot nematode () are two important pathogens of sugarcane ( hybrid). No commercial cultivars are resistant to these nematodes in Australia. Twenty accession lines of , a wild relative of sugarcane, were tested against these two nematode species. lines were tested twice for resistance to root-lesion nematode and three times for root-knot nematode. Reproduction (final population/starting population) of root-lesion nematodes was significantly lower in 17 of the 20 accession lines tested in two experiments compared with two commercial cultivars. Four lines supported a significantly lower number of root-lesion nematodes per gram of root than that of two commercial sugarcane cultivars. Reproduction of root-knot nematodes was significantly lower in 16 lines compared with two commercial cultivars. Fourteen of the lines tested supported significantly fewer eggs per gram of root compared with two commercial cultivars. This study showed that lines possessed resistance for root-lesion and root-knot nematodes. Targeted crossing with commercial hybrid parental lines should be conducted to introduce nematode resistance into sugarcane cultivars for the Australian sugar industry.
根结线虫（）和根腐线虫（）是甘蔗（杂种）的两种重要病原体。在澳大利亚，没有商业品种对这些线虫具有抗性。对 20 个甘蔗野生近缘种（）的品系进行了这两种线虫的抗性测试。对根腐线虫进行了 2 次抗性测试，对根结线虫进行了 3 次抗性测试。与两个商业品种相比，在两个实验中，20 个品系中的 17 个品系的根腐线虫繁殖（最终种群/起始种群）明显较低。与两个商业甘蔗品种相比，有 4 个品系每克根中根腐线虫的数量明显减少。与两个商业品种相比，根结线虫的繁殖在 16 个品系中明显较低。与两个商业品种相比，14 个品系每克根中所含的卵数明显较少。本研究表明，品系具有抗根腐线虫和根结线虫的能力。应与商业杂交亲本品系进行有针对性的杂交，将线虫抗性引入甘蔗品种，以满足澳大利亚制糖业的需求。
