利用陆地棉与海岛棉进行杂交，在杂交后代较易分离筛选出大铃类型，但对Ｆ４以后继续分离筛选基本无效。利用不同大铃姊妹系杂交、或回（复）交后有一定改进效应，从姊妹系间杂交Ｆ１代可以获得大铃优势，且对其后代有一定影响。大铃类型的纤维较长、子指较大，但铃容重、衣分和衣指却偏低。 Using Gossypium hirsutum and G. barbadense hybridization, it is easy to separate and select the big bell type in hybrid progeny, but it is basically ineffective to continue separation and screening after F4. The results showed that the use of different sibling sibling line hybridization, or back (double) after the cross has some improvement effect, from the sibling F1 generation can get big bell advantage, and have some influence on their offspring. Large bell type of fiber longer, larger child, but the bell weight, clothing points and clothing fingers are low.