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2008年在湖北恩施、2009年和2010年在海南陵水分别采取自然诱病和人工接种方法对158份中国水稻微核心种质和137份“全球水稻分子育种计划”亲本材料进行了抗纹枯病大田鉴定和评价,未发现免疫材料,抗病和中抗材料的比例分别为0.3%和13.9%;大多数属于感病范围,中感、感病和高感材料的比例分别为40.0%、25.8%和20.0%。其中BR24、Hnankar、解放籼、秕五升、赤壳糯、红旗5号、泽谷、寸谷糯和旱麻稻在3年2地的鉴定中均达中抗水平;Serendahkuninmdaysia、SAI-BUI-BAO、Giza14和香稻在个别年份中达抗病水平。在海南2年试验中测定了各材料的纹枯病病级、相对病斑长、相对病斑高、抽穗期和株高,通过分析,发现纹枯病病级与相对病斑长和相对病斑高呈极显著正相关,而与抽穗期和株高呈极显著负相关,相对病斑长和相对病斑高可以作为抗性鉴定和评价的指标之一。
In 2008, Enshrines in Enshi, Hubei Province, and natural inoculation and artificial inoculations in Lingshui of Hainan Province in 2009 and 2010 were used to test 158 microsatellite core collections of China and 137 “Global Rice Molecular Breeding Program” parent materials Rhizoctonia solani was identified and evaluated in field, no immune materials were found, and the proportion of disease-resistant and medium-resistant materials was 0.3% and 13.9% respectively. Most of the susceptible materials were susceptible, susceptible, susceptible and susceptible. %, 25.8% and 20.0%. Among them, BR24, Hankankar, Jiefangxian, Luanwu, Chuanhuannuo, Hongqi 5, Zeguo, Yougonguo and Helao were all medium resistant in the three years and two years. Serendahkuninmdaysia, SAI-BUI- BAO, Giza14 and fragrant rice reach the disease resistance level in a few years. In the two-year experiment in Hainan, the sheath blight grade of each material was determined, with relative lesion length, relative disease spot height, heading date and plant height. Through the analysis, it was found that the sheath blight disease stage was relative to the lesion length and relative disease There was a significant positive correlation between patch height and height, but a very significant negative correlation with heading date and plant height. The relative disease length and relative disease height could be used as one of the indexes for resistance evaluation and evaluation.