Genetics Department, McGill University, Montreal, Canada.
Theor Appl Genet. 1970 Jan;40(4):176-84. doi: 10.1007/BF00282700.
Crosses were made, in all combinations, between 2 parental genotypes of Linum and their reciprocal F 1 hybrids. The parents and progeny obtained were grown in controlled environmental conditions and sampled at 35 and 70 days after germination to determine, on an individual plant basis, total plant fresh weight and peroxidase activity of main stem tissue. Peroxidase activity required transformation to a log10 scale, whereas the original linear scale was satisfactory for plant weight. There was no correlation between plant weight and corresponding peroxidase activity. Pronounced heterosis appeared in the F 1's for both characters at sample 1, but this heterosis had declined at sample 2 and in the F 2's. Heterosis operated in a positive direction for plant weight and in a negative direction for peroxidase activity. No consistent differences were found amongst the variances of segregating or non-segregating generations for either character.
在亚麻的 2 个亲本基因型及其正反交 F1 杂种之间进行了所有组合的杂交。在控制环境条件下种植亲本和后代，并在发芽后 35 天和 70 天进行采样，以确定每个植物的总植物鲜重和主茎组织的过氧化物酶活性。过氧化物酶活性需要转换为对数标度，而对于植物重量，原始线性标度是令人满意的。植物重量与相应的过氧化物酶活性之间没有相关性。在第 1 个样本中，这两个特征在 F1 中均表现出明显的杂种优势，但在第 2 个样本和 F2 中，这种杂种优势已经下降。杂种优势在植物重量上表现为正向作用，而过氧化物酶活性则表现为负向作用。对于两个特征，在分离或非分离世代的方差中，没有发现一致的差异。
