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以12个全国大面积种植的小麦生产品种和1个高感品种为试材,利用抗性组分法研究了中国小麦条锈菌(Puccinia striiformis f.sp.tritici,Pst)4个主要流行小种条中32号、条中31号、水源11-14和水源11-4的寄生适合度。因子分析结果表明,病害量是度量条锈菌生理小种寄生适合度最重要的参数,其次是夏孢子生活力、产孢能力、产孢面积、产孢期,由此提出寄生适合度=(产孢量×侵染概率×夏孢子堆密度×夏孢子萌发率)/潜育期。研究还发现,条中32号的寄生适合度最高,致病性最强,与目前该小种为优势小种的事实相符;水源11-14的寄生适合度较高,有较大的发展潜力,在抗病育种中应予以高度重视。
Twelve wheat cultivars and one high susceptible cultivar were planted in large area in China. The resistance components method was used to study the four major epidemics of Puccinia striiformis f. Sp. Tritici (Pst) The number of parasites in the 32th, Article 31, the water source 11-14 and 11-4 parasitic fitness. The result of factor analysis showed that the disease quantity was the most important parameter to measure the parasitism suitability of the race races of P. rust, followed by the activity of the sporulation, sporulation ability, sporulation area and sporulation period, and the parasitic fitness was Sporulation quantity × infection probability × Urease density × Urethral germination rate) / incubation period. The study also found that Article 32 of the parasitic fitness of the highest, the strongest pathogenicity, and the current race is the dominant races consistent facts; water 11-14 parasitic fitness is high, have greater potential for development , Should be highly valued in disease-resistant breeding.