田间条件下埃塞俄比亚小麦种质抗黄锈性评价

D. Kasa, T. Negash
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引用次数: 2

摘要

小麦锈病特别是黄锈病的暴发是埃塞俄比亚主要的生产制约因素。Arsi地区是黄锈病(锈病)的高发区,特别是Meraro和Bekoji地区由于环境有利和接种压力较大,经常发生黄锈病。因此,本研究的目的是在热点地区鉴定成株期黄锈病抗性的来源。本研究在Meraro、Arsi-Robe和Bekoji种植了375个优良选育系和高级选育系。结果表明,在Meraro, 34、10和54%的品系对中抗、中敏感和中敏感有抗性。在Arsi-Robe 61, 23.5%和15.5%的品系对中抗性、中敏感和中敏感表现为抗性。结果表明,在贝科集,35.5、21.3和43.2%的品系对中、中、中感黄锈病有抗性。Meraro(34%)、Bekoji(35.5%)和Arsi-Robe(61%)的平均感染系数(ACI)小于20%,分别为当前黄锈病抗性的良好百分比,表明Meraro和Bekoji的病压高于Arsi-Robe。在所有地点,43.7%的品系表现出良好的抗性水平(抗性程度<30%)。一般来说,在阿尔西-罗布表现出较强抗性的品系,在梅拉罗和贝科吉也表现出易感。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of Ethiopian Wheat Germplasm Against Yellow Rust (Puccinia striiformis) Disease Under Field Condition
Wheat rust outbreak especially yellow rust is the major production constraint in Ethiopia. Arsi Zone is the hot spot zone for yellow rust (Puccinia striiformis (Pst)) particularly Meraro and Bekoji sites are frequently yellow rust epidemic was occur due favorable environmental and higher pressure of inoculums in the areas. Therefore, the objective the study was to identify sources of resistance against yellow rust at adult plant stage under hot spot sites. In this study, Three hundred seventy five elite breeding and advanced lines were planted at Meraro, Arsi-Robe and Bekoji. The results show that 34, 10 and 54% of the lines at Meraro were found resistant to moderately resistant, intermediate and moderately susceptible to susceptible. At Arsi-Robe 61, 23.5 and 15.5% of lines were showed that resistant to moderately resistant, intermediate and moderately susceptible to susceptible. Finally, at Bekoji 35.5, 21.3 and 43.2% lines at were resistant to moderately resistant, intermediate and moderately susceptible to susceptible category of yellow rust. Average coefficient of infection (ACI) less than 20% showed at Meraro (34%), Bekoji (35.5%) and Arsi-Robe (61%) was good percent of resistance to the current yellow rust pressure respectively, indicating higher disease pressure at Meraro and Bekoji than that of Arsi-Robe. Among the lines, 43.7% showed a good level of resistance (<30% severity) in all locations. Generally, most of the lines, which showed better resistance at Arsi-Robe, were susceptible at Meraro and Bekoji.
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