Based on a parallel run done at CDN using the February 2006 data, the range and average change for Conformation and LPI are presented in Table 1 for proven Holstein bulls born since 1990.

• 根据CDN采用2006年2月的数据同时开展的管理活动，表一列出了1990年以后出生并经验证的荷兰种公牛的遗传力构造和LPI的范围与平均值变化情况。