Summary
The F4 and F5 generations of the two selected crosses, nk2 × nil1 and p3 × nil3, from a dialle of all possible crosses between the three conditioned lines p, nil and nk were grown in successive years in the summers of 1970 and 1971 respectively in order to study (1) the persistence of the segregation between F1 individuals seen in earlier generations and (2) the conventional segregation in the later generations. In the F4 generation V1 segregation in the cross nk2 × nil1 approaches significance for the character final height. In the F6 generation significant segregation between F1 individuals was not found for the characters final height and flowering time for either cross. However, in the cross nk2 × nil1 significant F1 segregation was found for two other characters, height at flowering time and the diameter of the eighth leaf. The presence of segregation at the F2, F3 and F4 levels was confirmed for both characters in both crosses by the fitting of a standard additive genetical and additive environmental model. From the estimates of D obtained the numbers of effective factors by which these lines differ were found to range from three to five.
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Eglington, E., Moore, C. The nature of the inheritance of permanently induced changes in Nicotiana rustica II. F4 and F5 generations of selected crosses. Heredity 30, 387–395 (1973). https://doi.org/10.1038/hdy.1973.47
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DOI: https://doi.org/10.1038/hdy.1973.47