Emergence of wheat blast in Bangladesh was caused by a South American lineage of Magnaporthe oryzae.

Emergence of wheat blast in Bangladesh was caused by a South American lineage of Magnaporthe oryzae.
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DOI:
10.1186/s12915-016-0309-7
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发表时间:
2016-10-03
期刊:
影响因子:
5.4
通讯作者:
Kamoun S
Kamoun S
中科院分区:
生物学2区
文献类型:
--
作者:
Islam MT;Croll D;Gladieux P;Soanes DM;Persoons A;Bhattacharjee P;Hossain MS;Gupta DR;Rahman MM;Mahboob MG;Cook N;Salam MU;Surovy MZ;Sancho VB;Maciel JL;NhaniJúnior A;Castroagudín VL;Reges JT;Ceresini PC;Ravel S;Kellner R;Fournier E;Tharreau D;Lebrun MH;McDonald BA;Stitt T;Swan D;Talbot NJ;Saunders DG;Win J;Kamoun S

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2016年2月,孟加拉国8个地区的麦田发现了一种新的真菌疾病。据估计,疫情蔓延至15 000公顷,约占孟加拉国小麦种植面积的16%,产量损失高达100%。在疫情发生的几周内,我们对直接从孟加拉国田间采集的有症状的叶片样本进行了转录组测序。用从感染小麦籽粒中分离的菌株重新接种幼苗,小麦叶片出现小麦瘟病症状,而水稻没有。我们的系统基因组学和群体基因组学分析显示,孟加拉国的小麦瘟病暴发很可能是由侵染小麦的南美瘟病真菌Magnaporthe oryzae谱系引起的。我们的研究结果表明,基因组监测可以快速应用于监测植物病害的爆发,并提供有关病原的身份和来源的有价值的信息。本文的在线版本(doi:10.1186/s12915-016-0309-7)包含补充材料,可供授权用户使用。
In February 2016, a new fungal disease was spotted in wheat fields across eight districts in Bangladesh. The epidemic spread to an estimated 15,000 hectares, about 16 % of the cultivated wheat area in Bangladesh, with yield losses reaching up to 100 %. Within weeks of the onset of the epidemic, we performed transcriptome sequencing of symptomatic leaf samples collected directly from Bangladeshi fields. Reinoculation of seedlings with strains isolated from infected wheat grains showed wheat blast symptoms on leaves of wheat but not rice. Our phylogenomic and population genomic analyses revealed that the wheat blast outbreak in Bangladesh was most likely caused by a wheat-infecting South American lineage of the blast fungus Magnaporthe oryzae. Our findings suggest that genomic surveillance can be rapidly applied to monitor plant disease outbreaks and provide valuable information regarding the identity and origin of the infectious agent. The online version of this article (doi:10.1186/s12915-016-0309-7) contains supplementary material, which is available to authorized users.
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