Six generations, namely P 1 , P 2 , F 1 , F 2 , BC 1 and BC 2 of five crosses of bread wheat viz ., AKAW 4842 x Raj 4238, AKAW 4924 x RW 5, DBW 39 x MP 3353, GW 11 x DWAP 1540 and GW 455 x UP 2968 were developed to estimate the extent of heterosis and在面包小麦中,近亲抑郁症和基本遗传原因。对家庭之间的方差分析(十字)表明,由于所有字符,由于十字架引起的均方根都非常重要。每个家族(交叉)中后代(世代)之间方差的分析表明,在所有五个十字架中研究的所有字符的六个基本一代平均值之间存在显着差异。在本研究中,所有十字架都描述了每植物和几乎所有成分性状的谷物产量的显着和正质杂种和杂化。Among which crosses AKAW 4842 x Raj 4238, AKAW 4924 x RW 5, GW 11 x DWAP 1540 and GW 455 x UP 2968 depicted negative inbreeding as well as significant and positive mid parent heterosis and heterobeltiosis for grain yield per plant therefore, intermating in F 2 generation may be advantageous for improving particular character for above mentioned crosses.通常,可以通过谱系选择方法改善受固定添加基因效应的每植物的谷物产量。