v.使回交
n.回交
Backcross with c ommon wheat had completely no seed set. 用普通小麦回交，未获得回交后代。
The resistant level was declined with increasing of backcross generations. (2)在回交后代中，抗性水平逐代降低。
Dwarfing-sterile wheat was changed from winterness to springness by continue backcross. 摘要利用连续回交手段将矮败小麦由冬性转育为春性。
Methods The mice were bred in different ways,including crossbreed,backcross and intercross. 方法采用杂交、回交、互交的方法进行培育;
Backcross A cross between an individual and an individual of the original parent generation. 回交：杂交产生的子一代个体再与其亲本进行交配的方式。
