midparent

As a general, boll number usually has high midparent or competitive heterosis, the boll weight has middle heterosis, but there is have no midparent heterosis in lint percentage.

一般而言，单株铃数具有杂种优，铃重具有中等杂种优，衣分率则偏向双亲一方或居于中，有杂种优。