中文摘要：

通过Richards方程模拟不同品种油菜胚干重的动态变化，结果表明：正反交杂交种（系）前期经历的天数、积累的干重以及所占总生育期、总积累量的比例都小于父母本，而中期和后期都高于父母本，从而延长了杂交品种生育期的天数。增加胚干重；杂交品种最大速率、各期平均速率和整个积累过程的平均速率均小于常规品种。

英文摘要：

The dynamic changes of embryo dry weight in Brassica napus L. were imitated by Richards equation. The resuhs showed that： the time in early stage and the ratio of time in early stage to total stage in hybrids were less than that those in parents, and dry matter weight in early stage and the ratio of dry matter weight in early stage to total weight in hybrids were also less than that those in parents. The time in middle and late stage in hybrids were longer than those in parents, and the total accumulation duration of embryo in hybrids was longer than that in parents, so the final dry weight of embryo in hybrids was bigger than that in parents. Maximum rate, mean rate in every stage and total stage in hybrids were less than those in conventional varieties.