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首页> 外文期刊>The New Phytologist >A study on the susceptibility of rice cultivars to Striga hermonthica and mapping of Striga tolerance quantitative trait loci in rice.
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A study on the susceptibility of rice cultivars to Striga hermonthica and mapping of Striga tolerance quantitative trait loci in rice.

机译：水稻品种对Striga hermonthica的敏感性研究及水稻Striga耐性数量性状基因座的定位。

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摘要

Striga is a parasitic weed attacking mainly maize, sorghum, millet and cowpea. Studying the interaction between rice and Striga is valuable since rice is a model monocot. In this paper, the susceptibility of different rice cultivars to S. hermonthica was tested and quantitative trait loci (QTL) for Striga tolerance mapped on the Bala x Azucena F(6) population. Seven rice cultivars were grown with and without S. hermonthica for 14 wk. For the mapping experiment, 115 recombinant inbred lines (RILs), along with Azucena and Bala, were grown with and without Striga for 11 wk. Rice cultivars tested had different susceptibilities to Striga, ranging from highly susceptible to completely resistant. Azucena and Bala differed in the speed of Striga emergence and the impact on host growth. A genomic region between positions 139 and 166 cM on chromosome 1 was identified containing strong QTL (LOD = 4.9-15.7) for all traits measured. This indicates that genes for Striga tolerance exist in rice germplasm and the mapped QTL can be further studied to promote understanding of the nature of resistance/tolerance and breeding for Striga-resistant crop plants.
机译：Striga是一种寄生性杂草，主要侵害玉米，高粱，小米和cow豆。由于稻米是单子叶植物的典范，因此研究稻米和Striga之间的相互作用非常有价值。在本文中，测试了不同水稻品种对S.hermonthica的敏感性，并在Bala x Azucena F（6）种群上绘制了Striga耐性的数量性状基因座（QTL）。在有和没有沙门氏菌的情况下，共培育了七个水稻品种，持续了14周。对于作图实验，在有和没有Striga的情况下，将115个重组自交系（RIL）以及Azucena和Bala培育了11周。测试的水稻品种对Striga的敏感性不同，从高度敏感到完全抗药性不等。 Azucena和Bala在Striga出现的速度以及对寄主生长的影响方面有所不同。鉴定出在1号染色体上139和166 cM位点之间的基因组区域，其中包含针对所有测得性状的强QTL（LOD = 4.9-15.7）。这表明水稻种质中存在抗Striga的基因，可以进一步研究定位的QTL，以增进对抗Striga的作物的抗性/耐性和育种性质的了解。

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