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通过对我国20世纪90年代推广的部分高产杂交油菜新组合比较试验,筛选了9个有代表性的骨干组合。以在相同条件下的超低密度高产栽培,探讨杂交油菜新组合的抗逆性和丰产性。与秦油2号相比,以秦优7号为代表的4个杂交油菜新品种单株角果数达2507.6±60.5个,比秦油2号增加58.9个(变异系数为2.41%);角粒数秦优7号为21.55±1.50粒(变异系数为7.35%);千粒重差异不大;单株平均产量以秦优7号为最高达183.1g,实收产量为262.6kg/667m~2,比秦油2号增产12.3kg,增加4.91%。试验结果表明:20世纪90年代推广的这些杂交油菜新品种,已有相当部分达到或超过了秦油2号的抗逆性和丰产性。从选择的9个杂交油菜新品种可以看出,不同品种在同等条件下的抗逆性有明显差异,达到250kg 高产品种的冻害率、霜霉病率、茵核病率和裂杆率均低于低产油菜品种。
By comparing the new combinations of some high-yielding hybrid rapeseed popularized in China in the 1990s, nine representative backbone combinations were screened. Under the same conditions of ultra-low density and high yield cultivation, to explore the new combination of rapeseed resistance and high yield. Compared with Qinyou 2, the number of new fruit per plant of 4 hybrid rape represented by Qinyou 7 was 2507.6 ± 60.5, which was 58.9 more than that of Qinyou 2 (coefficient of variation was 2.41%); The grain number of Qinyou 7 was 21.55 ± 1.50 (coefficient of variation was 7.35%). The average grain yield of Qinyou 7 was up to 183.1g, and the yield per plant was 262.6kg / 667m ~ 2. Than Qinyou 2 yield 12.3kg, an increase of 4.91%. The test results showed that a considerable part of these hybrid rapeseed varieties popularized in the 1990s met or exceeded the resistance and high yield of Qinyou No.2. From the nine selected new hybrid rapeseed varieties, it can be seen that the resistance of different varieties under the same conditions has obvious difference. The frostbite rate, downy mildew rate, pathogeny rate and split rate of 250kg high-yielding varieties are all low Low yield rapeseed varieties.