Effect and breeding potential of qSB-11LE, a sheath blight resistance quantitative trait loci from a susceptible rice cultivar
Effect and breeding potential of qSB-11LE, a sheath blight resistance quantitative trait loci from a susceptible rice cultivar
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DOI：
10.1139/cjps10093
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发表时间：
2011
影响因子：
1.2
通讯作者：
S. Zuo;Yuejun Yin;Li Zhang;Ya-fang Zhang;Zongxiang Chen;S. Gu;Lihuang Zhu;Xuebiao Pan
中科院分区：
文献类型：
--
作者：
S. Zuo;Yuejun Yin;Li Zhang;Ya-fang Zhang;Zongxiang Chen;S. Gu;Lihuang Zhu;Xuebiao Pan
左S.、尹Y.、张L.、张Y.、陈Z.、顾S.、朱L.和潘X. 2011。qSB-11LE（易感水稻品种的纹枯病抗性QTL）的效果和育种潜力。能。 J.植物科学。 91：191-198。由立枯丝核菌引起的纹枯病（SB）是全世界水稻最重要的病害之一。 QTL qSB-11LE 位于 SB 易感粳稻品种 Lemont 的 11 号染色体上，在之前的研究中已被鉴定。在这项研究中，使用一组在 qSB-11LE 基因座上表现出三种不同基因型的近等基因系 (NIL) 和七个回交群体来评估其对 SB 抗性的影响及其在育种计划中的潜力。人工接种田间病害评价结果表明，qSB-11LE对SB的抗性遗传是受基因加性作用控制的，且基因对SB的抗性具有剂量效应。在温室评价中，qSB-11LE的抗性效应在分蘖期接种后11和14 d表现出来。对 Lemont 作为供体亲本和 6 个商业籼稻品种作为轮回亲本回交产生的 6 个 BC1F1 群体和 1 个 BC2F1 群体的田间抗性分析表明，qSB-11LE 可有效增强这些品种的 SB 抗性。这些观察结果表明，qSB-11LE 在水稻抗 SB 育种中具有相当大的潜力，并且其侧翼分子标记可用于实际育种计划中进行标记辅助选择。
Zuo, S., Yin, Y., Zhang, L., Zhang, Y., Chen, Z., Gu, S., Zhu, L. and Pan, X. 2011. Effect and breeding potential of qSB-11LE, a sheath blight resistance QTL from a susceptible rice cultivar. Can. J. Plant Sci. 91: 191-198. Sheath blight (SB) caused by Rhizoctonia solani is one of the most important diseases of rice worldwide. The QTL qSB-11LE, located on chromosome 11 of an SB-susceptible Oryza japonica rice cultivar Lemont, was identified in previous studies. In this study, its effect on SB resistance and its potential in breeding programs were evaluated using a set of near-isogenic lines (NILs) that exhibit three different genotypes at the qSB-11LE locus and seven backcross populations. Results of field disease evaluation under artificial inoculation showed that the inheritance of resistance of qSB-11LE to SB is controlled by additive gene action and that the genes have a dosage effect on SB resistance. In greenhouse evaluations, the resistance effect of qSB-11LE was expressed at 11 and 14 d after inoculation at the tillering stage. Analysis of field resistance of six BC1F1 populations and one BC2F1 population, developed from the backcrosses between Lemont as the donor parent and six commercial O. indica rice cultivars as recurrent parents, indicated that qSB-11LE could be effectively used to enhance these cultivars' SB resistance. These observations suggest that the qSB-11LE has considerable potential in rice breeding for resistance to SB, and that its flanking molecular markers could be employed in practical breeding programs for marker-assisted selection.