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Plant breeding studies in leguminous forage crops I. Natural cross-breeding in winter beans

Published online by Cambridge University Press:  27 March 2009

James L. Fyfe  and
Norman T. J. Bailey
James L. Fyfe
Affiliation:
Plant Breeding Institute, School of Agriculture, University of Cambridge
Norman T. J. Bailey
Affiliation:
Department of Human Ecology, University of Cambridge
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Extract

1. If a crop varies in respect to a character which shows simple Mendelian inheritance then it is possible to estimate the proportion of cross-fertilization within the crop from the data obtained by (i) drawing plants from the crop and scoring them in respect of the character, then (ii) growing their separate progenies and scoring them.

2. Maximum likelihood expressions are given for the estimation of p and f { = (1 — α)/(l + α)} from the genotypic classification of the parents and from the phenotypic classification of the progenies; where p is the gametic frequency of the dominant allel and α is the proportion of fertilizations in which the pollen is equally likely to come from any plant in the population.

3. When the above expressions are applied to a case in winter beans, in which the parent plants were selected for high yield it is found that the different estimates of p agree, but those of f do not.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 41 , Issue 4 , October 1951 , pp. 371 - 378
Copyright
Copyright © Cambridge University Press 1951

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References

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