O'Boyle Patrick D, Brooks Wynse S, Steffenson Brian J, Stromberg Erik L, Griffey Carl A
Betaseed, Inc., Shakopee, MN 55379.
Department of Crop and Soil Environmental Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24061.
Plant Dis. 2011 Jan;95(1):19-23. doi: 10.1094/PDIS-02-10-0096.
Net blotch, caused by Pyrenophora teres f. teres, is one of the most devastating diseases of barley (Hordeum vulgare). Efficient utilization of available resistance sources is dependent upon successful characterization of genes conditioning resistance in diverse sources. Five net-blotch-resistant parents and one susceptible parent were intercrossed to identify novel resistance genes and postulate gene number and mode of inheritance. Seedling response to isolate ND89-19 was evaluated in a greenhouse test. Results indicate that the resistant spring barley lines CIho 2291 and CIho 5098 and the winter barley cv. Nomini each have single dominant genes for resistance. Resistance in CIho 5098 is governed by the same dominant gene conferring resistance in Nomini. Resistance in CIho 2291 is controlled by one dominant gene which, putatively, is the same gene conferring resistance in ND B112 but differs from the resistance genes carried by the other parents in this study. The resistance gene in Nomini or CIho 5098 could be pyramided with the resistance gene in CIho 2291 or ND B112 to enhance the durability of resistance against a wide spectrum of P. teres isolates.
网斑病由圆核腔菌大麦专化型引起，是大麦（Hordeum vulgare）最具毁灭性的病害之一。有效利用现有的抗性资源取决于成功鉴定不同资源中控制抗性的基因。将五个抗网斑病亲本与一个感病亲本进行杂交，以鉴定新的抗性基因，并推测基因数量和遗传模式。在温室试验中评估了幼苗对分离株ND89-19的反应。结果表明，抗性春大麦品系CIho 2291和CIho 5098以及冬大麦品种Nomini各有一个抗网斑病的显性基因。CIho 5098中的抗性由与Nomini中 conferring resistance相同的显性基因控制。CIho 2291中的抗性由一个显性基因控制，该基因可能与ND B112中 conferring resistance的基因相同，但与本研究中其他亲本携带的抗性基因不同。Nomini或CIho 5098中的抗性基因可以与CIho 2291或ND B112中的抗性基因聚合，以增强对多种圆核腔菌分离株的抗性持久性。 （注：原英文文本中“conferring resistance”处表述似乎有误，可能影响准确理解，按字面翻译了。）
