Steed Andrew, King Julie, Grewal Surbhi, Yang Cai-Yun, Clarke Martha, Devi Urmila, King Ian P, Nicholson Paul
Department of Crop Genetics, John Innes Centre, Norwich, United Kingdom.
Department of Plant and Crop Sciences, School of Biosciences, Nottingham BBSRC Wheat Research Centre, University of Nottingham, Loughborough, United Kingdom.
Front Plant Sci. 2022 Jul 6;13:943211. doi: 10.3389/fpls.2022.943211. eCollection 2022.
A diverse panel of wheat wild relative species was screened for resistance to Fusarium head blight (FHB) by spray inoculation. The great majority of species and accessions were susceptible or highly susceptible to FHB. Accessions of (P95-99.1-1), (9439957), and (531552) were highly resistant to FHB while additional accessions of were found to be susceptible to FHB. A combination of spray and point inoculation assessments over two consecutive seasons indicated that the resistance in accession P95-99.1-1 was due to enhanced resistance to initial infection of the fungus (type 1 resistance), and not to reduction in spread (type 2 resistance). A panel of wheat- (accession P95-99.1-1) introgression lines was screened for FHB resistance over two consecutive seasons using spray inoculation. Most introgression lines were similar in susceptibility to FHB as the wheat recipient (Paragon) but substitution of the terminal portion of chromosome 3BS of wheat with a similar-sized portion of 3G of significantly enhanced FHB resistance in the wheat background.
通过喷雾接种对一系列不同的小麦野生近缘种进行了赤霉病（FHB）抗性筛选。绝大多数物种和种质对FHB敏感或高度敏感。节节麦（P95 - 99.1 - 1）、黑麦（9439957）和簇毛麦（531552）的种质对FHB高度抗性，而节节麦的其他种质对FHB敏感。连续两个季节通过喷雾和点接种评估表明，种质P95 - 99.1 - 1的抗性是由于对真菌初始感染的抗性增强（1型抗性），而非传播减少（2型抗性）。连续两个季节使用喷雾接种对一组小麦 - 节节麦（种质P95 - 99.1 - 1）渐渗系进行了FHB抗性筛选。大多数渐渗系在对FHB的敏感性方面与小麦受体（Paragon）相似，但用节节麦3G染色体上类似大小的片段替换小麦3BS染色体的末端部分，显著增强了小麦背景下的FHB抗性。
