以随机选取的5个父本、5个母本的组合为材料,随机配制杂交组合,对油菜株型性状和产量性状进行考察,研究油菜各主要性状杂种优势及相关性,通过其相关性分析,为杂种优势利用提供参考。

The study aimed to confirm the optimum isolation distance between double-high rape and double-low rape.The Huaza 5 was planted within 2000 m for free pollination around double-high rape Rongyou 4 erucic acid content was determined with paper chromatography,to study the influence of double high rape on the erucic acid content in double low rape under different distances.Under different isolation distances,the erucic acid content in Huaza 5 was influenced to different degrees,which showed some regularity along with the change of isolation distance.The influenced grains in 100 grains of Huaza5 at the distance of 4 m were 28.25 grains,after which the influence degree on erucic acid was decreased gradually along with the increment of isolation distance.The influenced grain in 100 grains at the distance of 32 m was reduced to 5.00 grains,and to 1.30 grains at the distance of 64 m,approaching to 0,and there was no any influence at the height of 128 m.The ascending rate of erucic acid was reduced gradually due to the increment of isolation distance in space.The influence of double-high rape on the erucic acid content in double-low rape was reduced along with the increment of isolation distance.The isolation should be over 32 m at least,best over 64 m.