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China's wheat acreage is about 24 million hectares, annual production of about 100 million tons, is the second largest food crop after rice. By bars Puccinia wheat biotypes (Puccinia. striiformis f. Sp. Tritici) of wheat stripe rust caused by winter wheat producing areas in all popular harm, is considered the most important disease of wheat one. Planting resistant varieties has been considered the most economical control of stripe rust, efficient and environmentally friendly way. However, stripe rust races of frequent small variations lead to a new species continue to produce popular, often make wheat varieties to promote three to five years to \Since the founding of New China, China has undergone large varieties seven times \Resistance resources scarcity and irrational use of resistance genes that control of stripe rust resistant varieties through the most basic measures can not play its due role. In recent years, the most important means of controlling stripe rust accurate monitoring and forecasting in the stripe rust epidemic, based on the widely used fungicide timely. In the long term, to find and discover new stripe rust resistance gene, rational use and layout of the current stripe rust resistance genes, is still the focus of anti-rust breeding. Therefore, this study on China's current cultivars at seedling in small species, adult stage mixed race and Tianshui natural disease for seedling and adult plant resistance to disease identification in order to identify the current level of resistance cultivars; By main effect of several known stripe rust resistance gene Yr5, Yr10, Yr15, Yr24/Yr26, Yr9, Yr17 and Yr18 for molecular detection and identification results combined with disease and breeding pedigree of the current rust resistance genes resistant varieties analysis in order to identify what the current wheat varieties carry Yr genes; home and abroad through differential host and known carrier of the gene varieties seedling and adult plant identification, evaluation known stripe rust resistance gene in wheat breeding in China effectiveness clearly available during future breeding for disease resistance which Yr genes for disease resistance in wheat breeding basis. The main results obtained in this study are as follows: 1) 494 copies in the tested wheat cultivars in our country and some back-up varieties, referring to artificial inoculation and the highest incidence of field natural reaction type, found that only 50 (10.1%) and for CYR32 CYR33 showed resistance at the seedling stage, 133 (26.9%) showed resistance to the adult stage, the remaining 311 parts (63%) non-resistant materials. Indicates that the current level of mainstream wheat resistant material is still very low in the future should increase the quality and disease resistance of new materials to explore and create new anti-source material, and promptly applied to actual production in the past. 2) the use of stripe rust resistance genes with known most closely linked molecular markers for molecular detection, combined with disease resistance and pedigree analysis, 50 were tested with a growth period of wheat resistant materials, the main source of resistance genes at 92R Series (Yr26 gene donor, 50 parts in 14 parts), Yr5 lack of effective genetic markers, Yr10 and Yr15 unused; 494 were tested varieties, many are carrying Yr9 gene (129), Yr17 usage times The (45), Yr18 using fewer (10 parts). 3) the known resistance genes spectral analysis showed that the small species on our current growth period of effective resistance genes: Yr5, Yr10, Yr15, Yr24, Yr26, effective adult plant resistance genes: Yr11, Yr12, Yr13, Yr14, Yr16, Yr18, YrSp, YrTr1, YrTr2, YrTye, YrExp1, YrExp2, YrDT so on.
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