Summary
Characters measured on the F5 generation of two crosses, p3 × nil3 and nk2 × nil1 between conditioned lines Nicotiana rustica, were analysed to study (1) the persistence of the segregation between F1 individuals and (2) the conventional segregation in the later generations. Significant F1 segregation was found in four characters in the cross nk2 × nil1 height at flowering time, the length of the branch in the axil of the eighth leaf at flowering time, and the length and width of the eighth leaf, while it was nearly significant for the height of the eighth leaf at flowering time. This item was not significant for any character in the p3 × nil3 cross. A standard biometrical genetical model was found to fit in the majority of cases confirming conventional segregation at the F2, F3 and F4 levels. Principle components analysis extracted three principle components from the seven characters measured in the F5 generation. The three components were the same for each cross and this information together with estimates of the numbers of effective factors segregating in these crosses suggested that for both crosses the parental lines differed by about 13 effective factors.
Article PDF
References
Eaves, L J, and Brumpton, R J. 1972. Factors of covariation in Nicotiema rustica. Heredity, 29, 151–175.
Eglington, E G, and Moore, C A. 1973. The nature of the inheritance of permanently induced changes in Nicotiana rustica. II. Analysis of segregation in the F4 and F5 generations or selected crosses. Heredity, 31.
Mather, K, and Jinks, J L. 1971. Biometrical Genetics. Chapman and Hall, London.
Perkins, J M, Eglington, E G, and Jinks, J L. 1971. The nature of the inheritance of permanently induced changes in Nicotiana rustica. Heredity, 27, 441–457.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Moore, C., Eglington, E. The nature of the inheritance of permanently induced changes in Nicotiana rustica. Heredity 31, 112–118 (1973). https://doi.org/10.1038/hdy.1973.63
Received:
Issue Date:
DOI: https://doi.org/10.1038/hdy.1973.63
This article is cited by
-
The number of phenotypes among the conditioned lines of Nicotiana rustica
Heredity (1976)
-
Estimating the number of genes in a polygenic system by genotype assay
Heredity (1976)
-
The nature of the inheritance of permanently induced changes in Nicotiana rustica II. F4 and F5 generations of selected crosses
Heredity (1973)