A diallel cross of genotypes and genotrophs of Linum

The nature of the inheritance of permanently induced changes in Nicotiana rustica

“…Not only is this pattern characteristic of the inheritance of these two characters in crosses between conventionally derived inbred lines of N. rustica (Mather and Jinks, 1971) but there is segregation both in the F2 and F3 generations of the conventional kind. This is similar to the situation in flax (Durrant and Tyson, 1964).…”

“…In both the F1 and F2 generations the S x L reciprocal cross shows greater variation than the Lx S cross (Durrant, 1962b). In the F2 of crosses between L and S and other varieties of flax and linseed the larger variation which is found to be associated with the S genotype is paternally inherited and the smaller variation of the L genotype is maternally inherited (Durrant and Tyson, 1964).…”

“…F1s of the kind reported for flax (Durrant and Tyson, 1964; and see section 1 d). These analyses, however, give an assessment of the situation over all the initial F1 crosses.…”

“…(a) The heritable changes are chromosomal since they are not transmitted through reciprocal grafts and the two reciprocal crosses L x S and S x L show equilineal inheritance (Durrant,I 962a). (b) The heritable changes within L and S display mainly additive genetic variation but some dominance variation (Durrant and Tyson, 1964).…”

Analysis of reciprocal differences in diallel crosses

“…cross with Linum Durrant and Tyson (1964) have described a diallel cross between six types of Linum comprising two flax genotypes, P and M, two linseed TABLE 7 Mean family variances (x zo) of log plant weights of F,families in a diallel cross of genotypes and genotrophs of Linum (Durrant and Tyson, 1964) genotypes, R and D, and two genotrophs, L and S. Table 7 gives the F2 family variances of the log, plant weights. Hayman's (1954) analysis, table 9 (a), shows that the residual reciprocal differences are larger than the array reciprocal differences.…”