MULTIPLE TRAIT SELECTION' IN WHITE PIXE 597 



LITERATURE CITED 



Bingham, R. T., R. J. Olson, W. A. Becker, and M. A. Marsden. 1969. 



Breeding blister rust resistant western white pine. V. Estimates of 



heritability , combining ability, and genetic advance based on tester 



matings. Silvae Genet. 18: 28-38. 

 Falconer, D. S. 1960. Introduction to quantitative genetics. Ronald 



Press, New York. 365 p. 

 Lerner, I. M. 1958. The genetic basis of selection. John Wiley $ Sons, 



New York. 298 p. 

 Patton, R. F., and A. J. Riker. 1966. Lessons from nursery and field 



testing of eastern white pine selections and progenies for resistance 



to blister rust, p. 403-414. In H. D. Gerhold, et at. (Ed.), Breeding 



pest-resistant trees. Pergamon Press, Oxford. 505 p. 

 Scheinberg, E. 196". The sampling variance of the relative efficiency 



of indirect to direct selection when using variance-covariance 



components. Austral. J. Statist. 9: 35-40. 

 Searle, S. R. 1965. The value of indirect selection: I. Mass 



selection. Biometrics 21: 682-707. 

 Soles, R. L., H. D. Gerhold, and E. H. Palpant. 1969. Testing white 



pine seedlings for weevil resistance, p. 1-6. In Proc. 2nd World 



Consult. Forest Tree Breeding, FO/FTB: 69,5/9. 



FLOOR DISCUSSION 



Panel leader Borlaug withheld discussion of this paper until after 

 Dr. Steenackers* paper, immediately following. 



