Hostname: page-component-77c89778f8-gvh9x Total loading time: 0 Render date: 2024-07-21T13:03:34.007Z Has data issue: false hasContentIssue false
  • English
  • Français

Inbreeding in synthetic varieties of field beans (Vicia faba L.)

Published online by Cambridge University Press:  27 March 2009

A. J. Wright
A. J. Wright
Affiliation:
Plant Breeding Institute, Cambridge
Get access Rights & Permissions [Opens in a new window]

Summary

A model which takes account of heterosis for total seed yield and autofertility was used to trace the evolution of the expected average inbreeding coefficient (F) of a synthetic variety of field beans under multiplication. In every case, the value of F rapidly approached an equilibrium value which depended largely on the amount of cross-fertilization and very little on the higher seed total set or amount of selfing on less inbred plants. There was no indication of any fluctuation in F from generation to generation when the proportion of cross-fertilization was constant. The possibility of reducing the coefficients of inbreeding of generations likely to be used on the farm (syn-4 and later) by hand pollination instead of open pollination of the parents and by promoting cross-pollination by artificial increases in numbers of bees or adjustment of environmental factors during multiplication were examined. Although the method of parental pollination had little effect, induced increases in bee activity led to significant reductions in F when the ambient frequency of bee pollinations was low. The generation at which this procedure gave the maximum effect was the final generation of seed increase (syn-3), but an alternative would be for farmers to use bees on the first commercial crop. In any case, only seed from crops with adequate bee pollination should be used to sow commercial crops.

As the breeding system was shown to be effectively very similar to one in which all plants are equally self-fertile, it should be possible to take account of the number (n) and coefficients of inbreeding (F0) and interrelationship (r0) of the parents, and to predict the yield of advanced generations using formulae given by Busbice (1969, 1970).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 89 , Issue 2 , October 1977 , pp. 495 - 501
Copyright
Copyright © Cambridge University Press 1977

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bond, D. A. (1966). Yield and components of yield in diallel crosses between inbred lines of winter beans (V. faba L.). Journal of Agricultural Science, Cambridge 67, 326–36.CrossRefGoogle Scholar
Bond, D. A. (1967). Combining ability of winter beans (V. faba L.). Journal of Agricultural Science, Cambridge 68, 179–85.CrossRefGoogle Scholar
Bond, D. A. & Pope, M. (1974). Factors affecting the proportion of cross-bred and self-bred seed obtained from field beans (V. faba L.) crops. Journal of Agricultural Science, Cambridge 83, 343–51.CrossRefGoogle Scholar
Busbice, T. H. (1969). Inbreeding in synthetic varieties. Crop Science 9, 601–4.CrossRefGoogle Scholar
Busbice, T. H. (1970). Predicting yield of synthetic varieties. Crop Science 10, 265–9.CrossRefGoogle Scholar
Drayner, J. M. (1956). Regulation of outbreeding in field beans (V. faba). Nature 177, 489–90.CrossRefGoogle Scholar
Drayner, J. M. (1959). Self- and cross-fertility in field beans (V. faba). Journal of Agricultural Science, Cambridge 53, 387–404.CrossRefGoogle Scholar
Free, J. B. & Williams, I. H. (1976). Pollination as a factor limiting the yield of field beans (V. faba L.). Journal of Agricultural Science, Cambridge 87, 395–9.CrossRefGoogle Scholar
Fyfe, J. L. & Bailey, N. T. J. (1951). Plant breeding studies in leguminous forage crops. I. Natural crossbreeding in winter beans. Journal of Agricultural Science, Cambridge 41, 371–8.CrossRefGoogle Scholar
Hayes, J. D. & Hanna, A. S. (1968). Genetic studies in field beans (V. faba L.). III. Variation in self-fertility in a diallel cross. Annals of Applied Biology 59, 289–95.Google Scholar
LaWes, D. A. (1973). The development of self-fertile field beans (V. faba L.). Welsh Plant Breeding Station Report, 1972, pp. 163–76.Google Scholar
Poulsen, M. H. (1975). Pollination, seed setting, cross-fertilization and inbreeding in Vicia faba L. Zeitschrift für Pflanzenzüchtung 74, 97–118.Google Scholar
Toynbee-Clarke, G. (1971). Pollination studies with highly-inbred lines in winter beans. (V. faba L.). Journal of Agricultural Science, Cambridge 77, 213–17.CrossRefGoogle Scholar
Wright, S. (1922). The effect of inbreeding and crossbreeding on guinea pigs. Bulletin USDA, 1/21.Google Scholar