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对北农大高油（BHO）基础群体的不同选择周期C0，C3，C4，C5，C6，C7和C8，采用随机区组设计，于1992和1993两年进行比较试验，分析了含油量等16个品质和农艺性状，研究了这些性状的动态变化以及含油量与其它性状的相关关系，评价了BHO的选择效果，对选择方法进行了一些探讨。结果表明：①对BHO基础群体8个周期的选择使含油量从4．81％提高到9．24％，平均每周期提高0．55％。实现遗传力为0.4877±0．02。经8个周期的选择，群体内方差无明显变化，近交水平提高很少。BHO群体仍有丰富的遗传变异和改良潜力。②对含油量的选择，也导致BHO群体的籽粒蛋白质含量和赖氨酸含量显著提高，分别由9．84％和0．31％提高到12．02％和0．38％；产量、百粒重、穗重、穗粒重、株高、穗粗在选择前期（C0～C4）显著降低，以后变化则不显著；蛋白质品质、穗位高、稳行数、行粒数、稳长、出籽率则无显著变化。③含油量与蛋白质含量、赖氨酸含量存在极显著的正相关，与稳重、穗粒重、穗粗、百粒重、产量存在显著的负相关，而与株高及其它性状则不存在显著的相关关系。④对BHO采用的选择方法（家系内选择）是合理和有效的，但如果采用综合选择的话，则可使遗传进展提高近10％。
The different selection cycles of C0, C3, C4, C5, C6, C7 and C8 of BNB basic population were studied by randomized block design in 1992 and 1993 respectively. Quality and agronomic traits. The dynamic changes of these traits and the relationship between oil content and other traits were studied. The selection effect of BHO was evaluated and the selection methods were discussed. The results showed that: ① The selection of 8 cycles of BHO basic population increased oil content from 4.81% to 9.24% with an average of 0.55% per cycle. Heritability was 0.4877 ± 0.02. After eight cycles of selection, there was no significant change in the variance within the group, with little improvement in the level of inbreeding. The BHO population is still rich in genetic variation and improvement potential. ② The selection of oil content also led to a significant increase of grain protein content and lysine content in BHO population, from 9.84% and 0.31% to 12.02% and 0.38% respectively. The yield, The panicle weight, panicle weight, grain weight per plant, plant height and ear diameter were significantly decreased at the early stage of selection (C0 ~ C4), but not significant afterwards. The protein quality, ear height, steady number, grain number, No significant change in seed rate. There was a significant positive correlation between oil content and protein content and lysine content, but significant negative correlation with grain weight, ear weight, ear weight, grain weight and yield, but no significant correlation with plant height and other traits The relationship between. ④ The selection method adopted by the BHO (selection within the family) is reasonable and effective, but genetic selection can be increased by nearly 10% if a comprehensive selection is adopted.