Young L D
J Nematol. 1996 Dec;28(4S):604-7.
Yields of four soybean cultivars were measured for 4 years in a field infested with Heterodera glycines race 3 and in a field infested with H. glycines race 14. Cultivars included Hutcheson (susceptible to both races), Deltapine 415 (resistant to race 3 and susceptible to race 14), Asgrow 5979 (resistant to both races), and Harwig (resistant to both races as well as most other known races of H. glycines). Although no above-ground symptoms of nematode infection were visible, mean yield was 16-32% greater for Asgrow 5979 than for Hutcheson. Yield for Dehpiue 415 was similar to that of Asgrow 5979 in the field infested with race 3 and similar to that of Hutcheson in the race 14-infested field. Hartwig produced lower yields than Asgrow 5979 in both fields. Yield differences, particularly between Asgrow 5979 and Hutcheson, were attributed primarily to nematodes because both cultivars have been shown to produce similar yields in the absence of H. glycines. This study illustrates the importance of knowing which race of the nematode is prevalent in a field and demonstrates that the nematode can cause significant yield loss in the absence of visible symptoms of infection.
在一块受到大豆孢囊线虫3号生理小种侵染的田地以及一块受到大豆孢囊线虫14号生理小种侵染的田地中，对四个大豆品种进行了为期4年的产量测定。品种包括哈奇森（对两个生理小种均易感）、三角洲松415（对3号生理小种抗病，对14号生理小种易感）、阿斯格罗5979（对两个生理小种均抗病）和哈维格（对两个生理小种以及大豆孢囊线虫的大多数其他已知生理小种均抗病）。尽管未观察到线虫感染的地上部症状，但阿斯格罗5979的平均产量比哈奇森高16% - 32%。在受到3号生理小种侵染的田地中，三角洲松415的产量与阿斯格罗5979相似，而在受到14号生理小种侵染的田地中，其产量与哈奇森相似。在两块田地中，哈维格的产量均低于阿斯格罗5979。产量差异，尤其是阿斯格罗5979和哈奇森之间的差异，主要归因于线虫，因为在没有大豆孢囊线虫的情况下，这两个品种已被证明产量相似。这项研究说明了了解田地中流行的线虫生理小种的重要性，并证明了在没有可见感染症状的情况下，线虫也会导致显著的产量损失。
