v.使回交

n.回交

Backcross with c ommon wheat had completely no seed set. 用普通小麥回交，未獲得回交后代。

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。

Approximately 20% of the backcrosses were selected for evaluation in testcrosses. 大約篩選出20%25的回交群體用作測交評價。

Dwarfing-sterile wheat was changed from winterness to springness by continue backcross. 摘要利用連續(xù)回交手段將矮敗小麥由冬性轉(zhuǎn)育為春性。

Methods The mice were bred in different ways,including crossbreed,backcross and intercross. 方法采用雜交、回交、互交的方法進行培育;