Theory for Transfer of Alleles1
- J. W. Dudley2
The objectives of this paper are to provide a theoretical framework for developing methods for incorporation of favorable alleles governing quantitative traits from exotic germplasm into adapted populations and to present computer simulation results evaluating the theory. Theoretical considerations suggest that the results apply to either improvement of an inbred line by adding favorable alleles from another line or to addition of favorable alleles from an exotic source to an adapted synthetic.
The results suggest that 1) if one parent has more loci containing favorable alleles than the other, at least one generation of backcrossing to the recipient population prior to initiation of selection will enhance the probability of recovering a population which outperforms the better parent or a llne better than the best llne which could be isolated from the better parent, 2) selection starting in the appropriate generation will usually be necessary to either improve the population mean to the desired level or to increase to a reasonable level the probability of obtaining a superior inbred line, and 3) the more diverse the parents, the more useful one or more generations of backcrossing becomes.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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