Skip to main content Accessibility help
×
Home

The genetic control of maturity and seed characters in sunflower crosses

  • M. J. Holtom (a1), H. S. Pooni (a1), C. J. Rawlinson (a1), B. W. Barnes (a1), T. Hussain (a1) and D. F. Marshall (a1)...

Summary

Data from the F1, F2 and F3 generations derived from four F1 hybrids of sunflower were analysed to determine the genetical control of eleven agronomically important traits namely, flowering time (FT), final height (FH), seed set (SS), fresh seed weight (FSW), dry seed weight (DSW), 25-seed weight (SSW), head diameter (HD), head angle (HA), neck width (NW), Botrylis infection (BI) and percentage oil content (PO), with the objective of assessing their potential for producing superior recombinant lines. Comparisons of means revealed significant differences between the F: generations of crosses for all the characters except FT. Model fitting indicated that these differences were attributed either to variation in the magnitude of the dominance component [h], or the projected mean of the Finfin; generation, m. Further, all the variation in the generation means was accounted for by the m and [h] parameters and epistasis was shown to be non-existent for almost all the traits. Analysis of the second degree statistics revealed the presence of additive genetic effects and most of the characters showed moderate heritability except for HD, which was highly heritable. All the crosses were predicted to produce significant numbers of transgressive segregants and consequently were expected to yield superior inbred lines and second cycle hybrids either to be released as varieties as such or to be utilized in future breeding work. The overall differences between the crosses, however, were not highly pronounced and therefore it was not possible to identify a cross which would yield markedly superior recombinant lines and F1 crosses compared to the others.

Copyright

References

Hide All
Agricultural and Food Research Council (1987). Alternative Crops for Arable Land. Agricultural and Food Research Council Annual Report for 1986–87, pp. 2737.
Church, V. J. & Rawlinson, C. J. (1991). Sunflower-a potential crop for the U.K. Helia 14, 117122.
Fick, G. N. (1975). Heritability of oil content in sunflowers. Crop Science 15, 7778.
Fisher, R. A. & Yates, F. (1963). Statistical Tables for Biological, Agricultural and Medical Research. Edinburgh: Oliver and Boyd.
Holtom, M. J. (1992). The polygenic inheritance of agronomic characters in the sunflower (Helianthus annuus). PhD thesis, University of Birmingham.
Hurt, E. F. (1946). Sunflower for Food, Fodder and Fertility, 2nd Edn.London: Faber and Faber.
Jinks, J. L. & Pooni, H. S. (1980). Comparing predictions of mean performance and environmental sensitivity of recombinant inbred lines based upon F3 and triple test cross families. Heredity 45, 305312.
Jinks, J. L. & Pooni, H. S. (1984). Comparison of inbred lines produced by single seed descent and pedigree inbreeding. Heredity 53, 299308.
Leclercq, P. (1969). Une stérilité mâle cytoplasmique chez le tournesol. Annales de l'Amelioration des Plantes 19, 99106.
Leclercq, P. (1970). Sunflower hybrids using male sterility. In Proceedings of the 4th International Sunflower Conference, Memphis, Tennessee, USA, pp. 123126.
Mather, K. & Jinks, J. L. (1982). Biometrical Genetics: The Study of Continuous Variation, 3rd Edn.London: Chapman and Hall.
Ŝkorić, D. (1992). Achievements and future directions of sunflower breeding. Field Crops Research 30, 231270.
Snedecor, G. W. & Cochran, W. G. (1980). Statistical Methods, 7th Edn.Ames, Iowa: Iowa State University Press.

The genetic control of maturity and seed characters in sunflower crosses

  • M. J. Holtom (a1), H. S. Pooni (a1), C. J. Rawlinson (a1), B. W. Barnes (a1), T. Hussain (a1) and D. F. Marshall (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed