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×国高，国高×国高，南非高×国高，印度高×国高。