heterosis

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，单株铃数具有较的杂种优，铃重具有中等的杂种优，衣分率则偏向双亲一或居于中间，没有杂种优。

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

杂种优利用模式主要是南非×中国，中国×中国，南非×中国，印度×中国。