heterosis

1.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，单株铃数具有较高的杂优，铃重具有等的杂优，衣分率则偏向双亲一或居于间，没有杂优。

2.The heterosis use model mainly is the Kafir×kaoliang, the kaoliang×kaoliang, trend Kafir×trend kaoliang, the Shallu×trend kaoliang.

杂优利用模式主要是南非高×国高，国高×国高，南非高×国高，印度高×国高。