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用３个Ａ系、３个相应Ｂ系和５个Ｒ系分别进行两套３×５个完全双列杂交，生产两种具有相同核基因型和不同胞质（一种具有Ｔ．ｔｉｍｏｐｈｅｅｖｉ胞质，即Ａ／Ｒ，另一种具有Ｔ．ａｅｓｔｉｖｕｍ胞质，即Ｂ／Ｒ）的小麦杂种。试验结果表明．Ａ／Ｒ和Ｂ／Ｒ杂种之间在籽粒灌浆特性和籽粒重量方面没有显著的差异．籽粒重量杂种优势似乎主要取决于核基因型。大多数Ａ系结的种子虽然皱瘪，但没有发现Ｆ１结的籽粒有这种现象。停滞期持续时间（Ｄ１）及直线期和成熟期平均籽粒灌浆率（即ＦＲ２和ＦＲ３）与千粒重正相关显著。大多数杂种在这些方面显示明显的双亲中值（ＭＰ）杂种优势。籽粒重量杂种优势值与ＭＰ值相关不显著．这表明小麦杂种籽粒重量杂种优势不会随ＭＰ值的增大而减小。
Two sets of 3x5 complete diallens were performed with three A lines, three corresponding B lines, and five R lines, respectively, to produce two plasmids with the same nuclear genotype and different cytoplasm (one with T. timopheevi cytoplasm , Ie A / R, another wheat hybrid having T. aestivum cytoplasm, ie B / R). The results showed that. There was no significant difference in grain filling characteristics and grain weight between A / R and B / R hybrids. The grain weight heterosis seems to depend primarily on the nuclear genotype. Although most of the A-tiered seeds were shriveled, this phenomenon was not observed in F1 knotted seeds. The duration of the stagnant period (D1) and the average grain filling rate (ie, FR2 and FR3) in straight line and maturity were positively correlated with 1000-grain weight. Most hybrids show significant parental median (MP) heterosis in these areas. There was no significant correlation between grain weight and MP value. This indicated that the hybrid heterosis of wheat grain weight did not decrease with increasing MP value.