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

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

杂种优势利用模式主要是南非高×高，高×高，倾南非高×倾高，印度高×倾高。