小麦–黑麦易位系T1BL·1RS在小麦品种中的分布及其与小麦赤霉病抗性的关联

小麦–黑麦易位系T1BL·1RS在小麦品种中的分布及其与小麦赤霉病抗性的关联
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DOI：
10.3724/sp.j.1006.2016.00320
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发表时间：
2016
期刊：
Acta Agronomica Sinica
影响因子：
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通讯作者：
李韬;郑飞;秦胜男;李磊;顾世梁
李韬;郑飞;秦胜男;李磊;顾世梁
中科院分区：
其他
文献类型：
--
作者：
李韬;郑飞;秦胜男;李磊;顾世梁

文献摘要

相似文献

黑麦1 R染色体短臂（1 RS）携带抗条锈病、叶锈病、茎锈病、白粉病和蚜虫的基因。为了了解1 RS是否也介导了对小麦赤霉病（Fusarium header bilight，FHB）的抗性，本研究利用1 RS-232对来自不同地理区域的192份小麦材料和由宁7840和Chokwang杂交得到的184个重组自交系（RIL）群体进行了基因分型。并采用单小花接种法对温室连续3个季节的FHB严重程度进行了评价。结果表明，在192份材料中，有22份材料携带T1 BL 1 RS易位，且3个试验中，携带T1 BL 1 RS易位的材料的平均FHB严重度（PSS）显著低于未携带该易位的材料（P < 0.05），表明1 RS可能对降低FHB严重度有积极作用。1 RS特异性标记Xscm 9和基因组原位杂交（Genome in situ hybridization，GISH）结果表明，宁7840携带T1 BL 1 RS易位。在RILs群体中，无论Fhb 1基因座如何，易位系的平均PSS均显著低于非易位系。Fhb 1和1 RS对FHB抗性的影响是加性的，两者之间的交互作用不显著（P = 0.48）。因此认为，黑麦1RS染色体很可能携带赤霉病扩展抗性相关基因，与Fhb1基因有累加效应。
The short arm of 1R chromosome (1RS) of rye carries resistant genes to stripe rust, leaf rust, stem rust, powdery mil- dew and aphids. To understand if 1RS also mediates resistance to wheat Fusarium head blight (FHB), we genotyped a panel of 192 wheat accessions from diverse geographic regions and a population of recombinant inbred lines (RIL) consisting of 184 lines developed from the cross of Ning 7840 and Chokwang by 1RS-specific molecular marker Xscm9 and evaluated FHB severities in three consecutive seasons in greenhouses using single floret inoculation method. The results demonstrated that 22 of 192 acces- sions carried a T1BL1RS translocation, and the mean FHB severity (PSS) of varieties carrying T1BL1RS translocation was sig- nificantly lower than that of lines without the translocation across the three experiments (P < 0.05), indicating 1RS may have a positive effect on reducing FHB severity. 1RS-specific marker Xscm9 and Genome in situ hybridization (GISH) showed Ning 7840 carries T1BL1RS translocation. In the population of RILs, irrespective of Fhb1 locus, the mean PSS of lines with T1BL1RS translocation was significantly lower than that of those lines without T1BL1RS. The effects of Fhb1 and 1RS on FHB resistance were additive and the interactions between them were not significant (P = 0.48). The results of this study suggested that 1RS of rye most likely carries the genes resistant to FHB.