Identification of Fusarium head blight resistance loci in two Brazilian wheat mapping populations.
Identification of Fusarium head blight resistance loci in two Brazilian wheat mapping populations.
复制标题
两个巴西小麦作图群体抗赤霉病位点的鉴定。
DOI：
10.1371/journal.pone.0248184
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Nicholson P
中科院分区：
文献类型：
--
作者：
Goddard R;Steed A;Scheeren PL;Maciel JLN;Caierão E;Torres GAM;Consoli L;Santana FM;Fernandes JMC;Simmonds J;Uauy C;Cockram J;Nicholson P
小麦赤霉病（Fusarium Head Blight，FHB）是小麦的一种重要病害。这导致南美以及世界上许多其他小麦种植区的主要产量损失。FHB由于产生诸如脱氧雪腐镰刀菌烯醇（DON）的真菌毒素而导致低质量、受污染的谷物。在巴西，FHB爆发的频率正在增加，目前通过昂贵且可能对更广泛的环境有害的杀真菌剂来控制。为了明确巴西小麦赤霉病抗性的遗传基础，对两个赤霉病抗性分离的作图群体（Anahuac 75 × BR 18-Terena和BR 18-Terena × BRS 179）进行了表型分析，并进行了数量性状位点（QTL）分析，以确定与赤霉病相关性状相关的基因组区域。共检测到14个与赤霉病视觉症状相关的QTL，每个QTL解释的表型方差为3.7-17.3%。这些QTL中有两个在不同环境下是稳定的。这表明Anahuac 75、BR 18-Terena和BRS 179中的FHB抗性受多个遗传位点控制，这些遗传位点赋予抗性相对较小的差异。一个主要的，新的QTL与DON积累也被确定在染色体4 B（17.8%的表型方差），以及一个主QTL与千粒重染色体6 B（16.8%的表型方差）。这些QTL可能是有用的育种目标，当与主要的抗性来源，如Fhb 1，以改善粮食品质和减少对杀菌剂的依赖，在巴西和其他国家受FHB影响。
Fusarium head blight (FHB) is a disease of wheat (Triticum aestivum L.) that causes major yield losses in South America, as well as many other wheat growing regions around the world. FHB results in low quality, contaminated grain due to the production of mycotoxins such as deoxynivalenol (DON). In Brazil, FHB outbreaks are increasing in frequency and are currently controlled by fungicides which are costly and potentially harmful to the wider environment. To identify the genetic basis of resistance to FHB in Brazilian wheat, two mapping populations (Anahuac 75 × BR 18-Terena and BR 18-Terena × BRS 179) segregating for FHB resistance were phenotyped and quantitative trait loci (QTL) analysis was undertaken to identify genomic regions associated with FHB-related traits. A total of 14 QTL associated with FHB visual symptoms were identified, each of which explained 3.7–17.3% of the phenotypic variance. Two of these QTL were stable across environments. This suggests FHB resistance in Anahuac 75, BR 18-Terena and BRS 179 is controlled by multiple genetic loci that confer relatively minor differences in resistance. A major, novel QTL associated with DON accumulation was also identified on chromosome 4B (17.8% of the phenotypic variance), as well as a major QTL associated with thousand-grain weight on chromosome 6B (16.8% phenotypic variance). These QTL could be useful breeding targets, when pyramided with major sources of resistance such as Fhb1, to improve grain quality and reduce the reliance on fungicides in Brazil and other countries affected by FHB.
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影响因子：
2.5
作者：
Cruz, Maria Fernanda A.;Prestes, Ariano M.;Scheeren, Pedro L.
通讯作者：
Scheeren, Pedro L.
影响因子：
7.4
作者：
Chandler, PM;Marion-Poll, A;Gubler, F
通讯作者：
Gubler, F
影响因子：
5.4
作者：
Draeger, R.;Gosman, N.;Nicholson, P.
通讯作者：
Nicholson, P.
影响因子：
2
作者：
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通讯作者：
Gale, MD
影响因子：
3.2
作者：
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通讯作者：
von Tiedemann, Andreas