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Selecting Crosses Using Information from a Diallel Cross
R. N. Curnow
Vol. 36, No. 1 (Mar., 1980), pp. 1-8
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2530489
Page Count: 8
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Theory and simulation are employed to compare the selection of crosses, using the yields of the individual crosses themselves and using the sum of the estimated general combining abilities of the two parents of each cross. The potential of an index combining these two sources of information is also considered. Selection on the basis of general combining ability is to be preferred unless the variance of the specific combining abilities of the parents exceeds twice the variance of their general combining abilities. In the latter case, selection should be based on the performance of the individual crosses. An index is unlikely to be worthwhile except as an insurance against poor estimates of the genetic variance components. The practical implications of the results for the planning of selection programmes are briefly discussed. The results obtained may be useful in applications of the diallel method in fields other than genetics.
Biometrics © 1980 International Biometric Society