Genetic relationships between resistances to Fusarium head blight and crown rot in bread wheat (Triticum aestivum L.)
Genetic relationships between resistances to Fusarium head blight and crown rot in bread wheat (Triticum aestivum L.)
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DOI：
10.1007/s00122-010-1363-0
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发表时间：
2010-09-01
影响因子：
5.4
通讯作者：
Liu, Chun Ji
中科院分区：
文献类型：
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作者：
Li, Hao Bing;Xie, Guo Qiang;Liu, Chun Ji
小麦赤霉病和冠腐病是由同一病原菌引起的两种小麦病害。如果相同的基因参与了对这两种不同疾病的抗性，则抗赤霉病种质可能会对CR抗性的进展有所裨益。为了研究寄主对这两种疾病的抗性之间的关系，进行了两项独立的研究。在第一项研究中，评估了32种基因型，发现他们对FHB的反应与CR之间没有明显的相关性。第二项研究是基于对一个对两种疾病都有抗性的品种产生的加倍单倍体群体进行的QTL分析。本研究结果表明，赤霉病和赤霉病抗性基因座位于不同的染色体上。综上所述，这些结果表明，尽管有共同的病原学，但不同的寄主基因参与了小麦对赤霉病和赤霉病的抗性。因此，虽然影响这两种疾病的基因可能存在于其他种质中或在不同的条件下，但在鉴定CR抗性来源时似乎需要单独筛选。
Fusarium head blight (FHB) and crown rot (CR) are two wheat diseases caused by the same Fusarium pathogens. Progress towards CR resistance could benefit from FHB-resistant germplasm if the same genes are involved in resistance to these two different diseases. Two independent studies were conducted to investigate the relationship between host resistances to these two diseases. In the first study 32 genotypes were assessed and no significant correlation between their reactions to FHB and CR was detected. The second study was based on a QTL analysis of a doubled haploid population derived from a variety with resistance to both diseases. Results from this study showed that loci conferring resistance to FHB and CR are located on different chromosomes. Together, these results suggest that, despite a common aetiology, different host genes are involved in the resistance against FHB and CR in wheat. Thus, although it is possible that genes affecting both diseases may exist in other germplasm or under different conditions, separate screening seems to be needed in identifying sources of CR resistance.