... 育种程序breeding procedure 育种增益breeding gain (BG) 指数选择index selection ...
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6 superior clones were selected by the means of simple index selection. They provided not only superior clones for plantation, but also scientific basis for clone breeding.
采用简化的指数选择法筛选出6个综合性状优良的无性系，为生产提供优良的杉木无性系基础材料，同时为无性系育广西大学硕士学位论文种提供理论依据。
参考来源 - 杉木无性系生长与材性综合遗传改良研究·2,447,543篇论文数据，部分数据来源于NoteExpress
银杏叶用品种更适于直接或指数选择。
The direct or index selection is more suited to leaf used cultivars of Ginkgo.
给出了截尾误差公式及截尾指数选择公式。
The formulas of truncated error and truncated index are given.
关于股指期货，前人曾对指数选择、合约设计和风险控制等方面分别作过研究。
Many studies have been carried about the stock index futures, and they mainly focused on the index choice, the contract design, the risk control and so on.
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