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。
The results indicated that the dwarf plants of Iris germanica could be obtained through repeated backcrossing to the dwarf parent. 以花色为主要观赏指标的鸢尾矮生植株需通过与矮生亲本的反复回交筛选得到。
The F1 plants of wheat/Y127 gave many tillers, but the backcrossing or self-pollinating descendants produced few seeds. 以普通小麦为母本与柱穗山羊草杂交，F1代分蘖率极高，植株性状出现中亲遗传或超亲遗传，杂交种回交或自交结实率非常低。
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。
