S. Kedharnath 



THE LONG-RANGE OUTLOOK FOR PRODUCTION OF RUST RESISTANT 



TREES BY INDUCED MUTAGENESIS * 551 



Hans Hattemer 



PERSISTENCE OF RUST RESISTANCE 561 



Ernst J. Schreiner 



MASS PRODUCTION OF IMPROVED FOREST TREE PLANTING STOCK 



THROUGH SYNTHETIC VARIETIES 571 



Henry D. Gerhold 



MULTIPLE TRAIT SELECTION IN WHITE PINE BREEDING SYSTEMS: 



BLISTER RUST RESISTANCE, WEEVIL RESISTANCE, TIMBER YIELD . . 591 



Victor M. Steenackers 



BREEDING POPLARS RESISTANT TO VARIOUS DISEASES 599 



Scott S. Pauley and Clifford E. Ahlgren 



A WHITE PINE BLISTER RUST RESISTANCE BREEDING PROJECT IN 

 NORTHEASTERN MINNESOTA 609 



Norman E. Borlaug 



MODERATOR'S SUMMARY: A CEREAL BREEDER AND EX-FORESTER'S 



EVALUATION OF THE PROGRESS AND PROBLEMS INVOLVED IN 



BREEDING RUST RESISTANT FOREST TREES 615 



VI. COMMITTEE REPORT: INTERNATIONAL UNION OF FOREST RESEARCH 

 ORGANIZATIONS, SUBJECT GROUP ON GENETIC RESISTANCE TO 

 FOREST DISEASES AND INSECTS 643 



Richard T. Bingham, Howard B. Kriebel, and J . Grerrmen 



REPORT OF THE 1969 ORGANIZATIONAL MEETINGS OF THE WORKING 



PARTY FOR RESISTANCE OF WHITE PINES TO BLISTER RUST .... 645 



SUBJECT INDEX 657 



AUTHOR INDEX AND LIST OF STUDY INSTITUTE PARTICIPANTS 677 



XI 



