Sheath blight disease of rice causes substantial crop losses and resistance sources are rare. A moderately resistant genotype CR 1014 was identified and hybridized with highly susceptible genotype Swarna-Sub1. In the F2 and F2:3 generations, three QTLs (qShB-1.1, qShB-1.2 and qShB-1.3) were mapped in chromosome-1. In F5 generation of the same cross and F4 generation of an alternative mapping population (Tapaswini/CR 1014), only the major QTL qShB-1.1 was recorded consistently with high LOD score (> 5.0). This stable QTL was co-localized with qShB1 reported earlier from Oryza nivara. A typical leucine rich repeat (LRR) motif containing gene (LOC_Os01g65650) and a chitin-inducible gibberellin-responsive protein coding non-LRR gene (LOC_Os01g65900) located within qShB-1.1 with high expression levels in leaf and shoot were predicted as putative candidate genes among others. Nearly 27.8% reduction in relative lesion height was recorded among several near isogenic lines of Swarna-Sub1 carrying the QTL region from CR 1014.

中文翻译：

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水稻品种 CR 1014 抗纹枯病的稳定数量性状位点 (QTL)

水稻纹枯病导致大量作物损失，抗性来源很少。鉴定出中等抗性基因型 CR 1014 并与高度敏感的基因型 Swarna-Sub1 杂交。在 F2 和 F2:3 代中，3 个 QTL（qShB-1.1、qShB-1.2 和 qShB-1.3）定位在 1 号染色体上。在相同杂交的 F5 代和替代作图群体 (Tapaswini/CR 1014) 的 F4 代中，只有主要 QTL qShB-1.1 的记录始终具有高 LOD 分数 (> 5.0)。这个稳定的 QTL 与早先从 Oryza nivara 报道的 qShB1 共定位。包含基因 (LOC_Os01g65650) 和编码非 LRC 基因 (LOC_Os01g65900) 的几丁质诱导赤霉素响应蛋白的典型富含亮氨酸重复序列 (LRR) 基序位于 qShB-1 中。在叶和芽中具有高表达水平的 1 被预测为推定的候选基因等。在携带来自 CR 1014 的 QTL 区域的 Swarna-Sub1 的几个近等基因系中，相对病灶高度降低了近 27.8%。