The effect of different levels of beet cyst nematodes (Heterodera schachtii) and beet necrotic yellow vein virus (BNYVV) on single and double resistant sugar beet cultivars
The effect of different levels of beet cyst nematodes (Heterodera schachtii) and beet necrotic yellow vein virus (BNYVV) on single and double resistant sugar beet cultivars
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DOI：
10.1023/a:1020874511047
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发表时间：
2002-10-01
影响因子：
1.8
通讯作者：
van Swaaij, ACPM
中科院分区：
文献类型：
--
作者：
Heijbroek, W;Munning, RG;van Swaaij, ACPM
近年来引进的抗甜菜胞囊线虫品种均来源于纯合自交系B883。该易位产物不稳定，与感病品种杂交时抗性传递不超过94%。在气候箱中的抗性品种的测试表明，对Heterodera schachtii和甜菜坏死黄脉病毒（BNYVV）的各种抗性，表示为每株植物的平均感染单位数和抗性植物的百分比。在一系列不同感染水平的田间试验中，Schachtii的结果表明，它们在所有抗性品种上的增殖率取决于初始密度，这是由于存在少量的感病植株造成的。由于B883还具有抗萎蔫性，因此在H.沙赫蒂。然而，随着H. schachtii，产量大幅下降，因为侵入幼虫引起抗性植物的超敏反应。根据三个系列的田间试验结果，认为在500 ~ 2000粒卵和幼虫的种群密度下，宜选用抗病品种。每100毫升土壤中含有的小球藻。双抗品种对H. schachtii和BNYVV的行为与H.甜菜孢囊线虫感染的土壤中的schachtii抗性，但不是与BNYVV。在H.双抗品种BNYVV的为害程度远大于单抗品种，表现出明显的上级优势。沙赫蒂。土壤病原体之间没有实质性的相互作用，也没有检测到抗性类型。
Beet cyst nematode-resistant cultivars, which were introduced recently, originated from the homozygous inbred line B883. This translocation product was unstable and the transmission of resistance when crossed with a susceptible cultivar did not exceed 94%. Tests with the resistant cultivars in climate cabinets showed a wide variety of resistance against Heterodera schachtii and beet necrotic yellow vein virus (BNYVV), expressed as average numbers of infective units per plant and percentages of resistant plants. In a series of field trials at different levels of infection of H. schachtii, their multiplication rates on all resistant cultivars depended on the initial density, which was caused by the presence of small numbers of susceptible plants. Since tolerance to wilting was also incorporated in B883, reasonable yields were obtained in the presence of H. schachtii. However, at increasing initial densities of H. schachtii, yields decreased considerably, since penetrating juveniles cause a hypersensitivity reaction in resistant plants. Based upon the results of three series of field trials, it was concluded that resistant cultivars should preferably be applied at population densities between 500 and 2000 eggs and juveniles of H. schachtii per 100 ml of soil. Cultivars with double resistance against H. schachtii and BNYVV behaved like those with H. schachtii resistance in soils infected with beet cyst nematodes, but not with BNYVV. In soils with a combined infection of H. schachtii and BNYVV double resistant cultivars were far superior to single resistant ones, since damage caused by BNYVV was far more serious than damage caused by H. schachtii. No substantial interaction between soil pathogens nor types of resistance could be detected.