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大豆花叶病毒(soybean mosaic virus,SMV)病是危害我国大豆生产的主要病害之一。利用黄淮大豆产区的SMV优势株系SC3和SC7对选育的394份大豆高世代新品系进行抗病性评价并分析其抗性来源。结果表明:对SC3株系表现高抗的品系有120份,占试验品系总数的30.46%;高抗SC7株系的品系有80份,占20.30%;对SC3和SC7株系都表现高抗的品系有64份,占鉴定品系数的16.24%。如大豆新品系H20443、H21660、H22501、Y50574和Y52933等通过审定后用于大田的生产将对SMV的流行起到控制作用。对选育的大豆新品系进行抗性来源分析可以发现,RT(抗病型)×RT组合获得抗病型后代品系的概率最高,其后依次为RT×IT(中间型)>RT×ST(感病型)>IT×RT>IT×IT>ST×RT>ST×IT,后代品系出现抗病型概率最低的组合是ST×ST。这些结果可为大豆新品系的选育和抗病育种亲本的组配提供参考依据。
Soybean mosaic virus (SMV) is one of the major diseases that endanger the production of soybean in China. The resistance of 394 new high-generation soybean lines were evaluated using SMV dominant lines SC3 and SC7 in Huanghuai soybean producing area and their resistance origins were analyzed. The results showed that there were 120 lines with high resistance to SC3 lines, accounting for 30.46% of the total number of lines tested, 80 lines with high resistance to SC7 lines accounting for 20.30%, and high resistance to both SC3 and SC7 lines There are 64 lines, accounting for 16.24% of the coefficient of identification. Such as the new line of soybean H20443, H21660, H22501, Y50574 and Y52933 and so approved for the field after the production will control the prevalence of SMV. According to the analysis of resistant origin of the selected new lines of soybean, we found that the RT (resistance type) × RT combinations had the highest probability of obtaining resistance type progeny strains, followed by RT × IT (intermediate type)> RT × ST Susceptible)> IT × RT> IT × IT> ST × RT> ST × IT. The combination with the lowest disease-resistant probability in the progeny lines is ST × ST. These results can provide a reference for the selection of new soybean lines and the breeding of disease-resistant breeding parents.