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Disease control

机译：疾病控制

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Smut is an important disease of sugarcane and was first reported in Australia in 1998. Since then, BSES Limited has been conducting smut screening programs in Indonesia, the Ord River Irrigation Area (ORIA) and in Bundaberg. In smut screening trials, stalks of clones from various stages of breeding programs are dip-inoculated with a smut spore suspension (106 spores/mL water) and planted in the field. Two methods of rating smut resistance screening trials were compared in a series of eight trials in 2008 and seven trials in 2009 in Bundaberg. Disease incidence (percent of infected stools) and disease severity (visual assessment of the severity of stunting and smut whip production) were measured in the plant and ratoon crops. A set of standard varieties with known field resistance was included in all trials. Regressions of the log transformed percent smut incidence and disease severity and the long term rating of the standard varieties were highly significant for both characters in both years. The resistance ratings for 2090 clones in 2008 series of trials and 2268 clones in 2009 series were calculated from the regression equations of the log transformed incidence or severity and the long term rating of the standard varieties. The ratings based on incidence would have discarded 4.7% of clones in 2008 and 6% of clones in 2009 that would have been retained if the disease severity rating had been used. Only 0.6% of clones in 2008 and 1.8% of clones in 2009 would have been discarded by the disease severity method that would have been retained if the incidence ratings had been used. Overall, the disease severity method would retain more clones but the differences between the two methods were small. Further research is required to better understand the relationship between the artificial smut resistance screening methods and field reaction of varieties in the different regions of Australia. The implications of the results on current and future screening trials are discussed.
机译：黑穗病是一种重要的甘蔗病，于1998年在澳大利亚首次报道。从那时起，BSES Limited一直在印度尼西亚，奥尔德河灌溉区（ORIA）和班德堡进行黑穗病筛查计划。在黑穗病筛选试验中，将来自育种程序各个阶段的克隆茎用黑穗病孢子悬浮液（106孢子/ mL水）浸入接种并在田间种植。在2008年和2009年在邦德堡进行的一系列八项试验和2009年的七项试验中，比较了两种评估黑穗病抗性筛选试验的方法。在植物和再生作物中测量了疾病发生率（感染粪便的百分比）和疾病严重程度（目视评估发育迟缓和黑穗病鞭产生的严重程度）。所有试验均包括一组具有已知田间抗性的标准品种。对数转换的黑穗病发病率和疾病严重程度的回归以及两个品种的标准品种的长期评级对于这两个年份都非常重要。根据对数转化的发生率或严重性的回归方程以及标准品种的长期评级，计算出2008年试验系列中2090个克隆和2009年系列中2268个克隆的抗性等级。如果使用疾病严重性等级，则基于发病率的等级将在2008年丢弃4.7％的克隆，在2009年丢弃6％的克隆。如果使用发病率等级，那么疾病严重程度方法将仅丢弃2008年的0.6％的克隆和2009年的1.8％的克隆。总体而言，疾病严重程度方法将保留更多克隆，但两种方法之间的差异很小。需要做进一步的研究，以更好地了解人工抗黑穗病筛选方法与澳大利亚不同地区品种的田间反应之间的关系。讨论了结果对当前和未来筛查试验的影响。

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  • 来源
    《International Sugar Journal》 |2011年第1350期|p.457-458|共2页
  • 作者

    S.A. Bhuiyan; B.J. Croft;

  • 作者单位

    BSES Limited, Bundaberg;

    BSES Limited, Woodford;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
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