Abstract
A study was made on the quantitative inheritance of seven characters viz., flowering time, plant height, leaf length, leaf width, number of curable leaves, green weight and cured weight for two crosses of flue-cured tobacco Chatham x Delcrest and 232 x Hicks. Six genetic populations P1, P2, F1, F2, B1 and B2 were observed in each cross.
Small and significant values of heterosis were observed for almost all the characters for the two crosses. Significant average inbreeding depression was found for all the characters in both the crosses.
Significant additive and dominant effects were found for the various characters in the cross Chatham x Delcrest in which the dominance gene effects were high. While in 232 x Hicks cross, additive gene effects contributed much in controlling the characters studied.
Significant epistatic effects were found for leaf length and number of leaves in the cross Chatham x Delcrest, flowering time and plant height in 232 x Hicks by χ2 test. Indications of exploiting these above two characters in plant breeding were revealed by these studies and a systematic approach in planning for such exploitation would be possible by further investigations.
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References
Bawolska, M., Berbeć', J. and Konczerewicz, A., 1960. The effect of heterosis in the tobacco hybrids (N. tabacum L.) (Polish). Roczn. Nauk. Rol., Ser. A., 81: 845–878. Ref. Tobacco Abs. 5: No. 649. 1961.
Brim, C. A., and Cockerham, C. C., 1961. Inheritance of quantitative characters in soy-beans. Crop Sci. 1: 187–190.
Gorsline, G. W., 1961. Phenotypic epistasis for ten quantitative characters in maize. Crop. Sci. 1: 55–58.
Hayman, B. I., 1958. Separation of epistatic from additive and dominance variation in generation means. Heredity 12: 371–390.
Hayman, B. I., 1960. The separation of epistatic from additive and dominance variation in generation means. II. Genetica 31: 133–146.
Hayman, B. I. and Mather, K., 1955. The description of genetic interactions in continuous variation. Biometrics 11: 69–82.
Mann, T. J. and Weybrew, J. A., 1958. Manifestations of hybrid vigour in crosses between flue-cured varieties of N. tabacum and N. sylvestris. Tobacco Sci. 2: 120–125.
Mather, K., 1949. Biometrical Genetics. Methuen & Co., London 1949.
Mather, K. and Vines, A., 1952. The inheritance of height and flowering time in a cross of Nicotiana rustica. Quantitative inheritance. H.M.S.O., London 1952: 49–79.
Matzinger, D. F., Mann, T. J. and Robinson, H. F., 1960. Genetic variability in flue-cured varieties of Nicotiana tabacum. 1. Hicks Broadleaf x Cocker 139. Agron. J. 52: 8–11.
Matzinger, D. F. and Mann, T. J., 1962. Hybrids among flue-cured varieties of Nicotiana tabacum in the F1 and F2 generations. Tobacco Sci. 6: 125–132.
Matzinger, D. F., Mann, T. J. and Cockerham, C. C., 1962. Diallel crosses in Nicotiana tabacum. Crop Sci. 2: 383–386.
Murthy, B. R., Murty, G. S. and Pavate, M. V. 1962. Studies on quantitative inheritance in Nicotiana tabacum L. II. Components of genetic variation for flowering time, leaf number, grade performance and leaf burn. Züchter 32: 361–369.
Povilaitis, B., 1964. Inheritance of certain quantitative characters in tobacco. Can. J. Genet. Cytol. 6: 472–479.
Robinson, H. F., Mann, T. J. and Comstock, R. E., 1954. An analysis of quantitative variability in Nicotiana tabacum. Heredity 8: 365–376.
Smith, H. H., 1952. Fixing transgressive vigour in Nicotiana rustica. Heterosis. Iowa State College Press, Ames, Iowa: 161–174.
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Gopinath, D.M., Lakshminarayana, R. & Narayana, C.L. The mode of gene action in flue-cured tobacco. Euphytica 16, 293–299 (1967). https://doi.org/10.1007/BF00043464
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DOI: https://doi.org/10.1007/BF00043464