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Published in Crop Sci 14:805-808 (1974)
© 1974 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Genetic Variances in a Random-Intercrossed Population of Burley Tobacco1

Paul D. Legg and G. B. Collins2

In a random-intercrossed population of burley tobacco (Nicotiana tabacum L.), genetic variances were estimated using biparental progenies from noninbred plants, biparental progenies from doubled haploid plants, and selfprogenies from doubled haploid plants. Additive genetic variances were important for days to flower, plant height, leaf length, and number of leaves. Additive x additive genetic variances were indicated for yield and total alkaloids. For leaf width, the significant amounts of genetic variability among the full-sib families in both the noninbred and inbred parental material could not be resolved into specific functions of genetic variances. Dominance variance appeared to be absent.

Key Words: Nicotiana tabacum L. • Biparental progenies • Doubled haploids • Genetic variability • Quantitative characters

1 Cooperative investigations of the Department of Agronomy, University of Kentucky and ARS, USDA, Lexington, KY 40506. The investigation reported in this paper (74-3-103) is part of a project of the Kentucky Agricultural Experiment Station and is published with the approval of the Director.

2 Research Geneticist, ARS, USDA, and Associate Professor of Agronomy, University of Kentucky.

Received for publication July 5, 1974.




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