Specifically, these include (1) production, (2) conformation, (3) longevity, (4) calving ease, (5) milking speed, (6) milking temperament and (7) reproductive performance.

• 具体包括：(1)产奶量；(2)遗传力构造；(3)奶牛寿命；(4)难产率；(5)挤奶速度；(6)挤奶性情和(7)繁殖性能。