Ch. 7— Maintaining Plant Diversity Offsite • 199 



plasm at the International Potato Center," Crop 

 Genetic Resources: Conservation and Evalua- 

 tion, J.H.W. Holden and J.T. Williams (eds.) 

 (London: George Allen & Unwin, 1984). 



51. International Board for Plant Genetic Resources, 

 Revised Priorities Among Crops and Regions, 

 AGP:IBPGR/81/34 (Rome: 1981). 



52. International Board for Plant Genetic Resources, 

 Practical Constraints Affecting the Collection 

 and Exchange of Wild Species and Primitive 

 Cultivars, AGPG:IBPGR/83/49 (Rome: 1983). 



53. International Board for Plant Genetic Resources, 

 "IBPGR Advisory Committee on In Vitro Stor- 

 age," First Meeting, Aug. 16-20, 1982 (Rome: 

 1983). 



54. International Board for Plant Genetic Resources, 

 IBPGR Advisory Committee on Seed Storage, 

 Report of the Second Meeting, Sept. 19-20, 

 1983, AGPG:IBPGR/83/116 (Rome: 1984). 



55. International Board for Plant Genetic Resources, 

 Cost-Effective Long-Term Seed Stores (Rome: 

 1985). 



56. International Board for Plant Genetic Resources, 

 "IBPGR Advisory Committee on In-Vitro Stor- 

 age," Report of the Second Meeting (Rome: 

 1985). 



57. Janick, J., Schery, R.W., Woods, F.W., and Rut- 

 tan, V.W., Plant Science. An Introduction to 

 World Crops, 2d ed. (San Francisco: W.H. Free- 

 man & Co., 1974). 



58. )ustice, O.L., and Bass, L., Principles and Prac- 

 tices of Seed Storage, Agriculture Handbook 

 No. 506 (Washington, DC: U.S. Department of 

 Agriculture, 1978). 



59. Kahn, R.P., "Plant Quarantine: Principles, 

 Methodology, and Suggested Approaches," 

 Plant Health and Quarantine in International 

 Transfer of Plant Genetic Resources, W.B. 

 Hewitt and L. Chiarappa (eds.) (Cleveland, OH: 

 CRC Press, 1977). In: Kahn, 1985. 



60. Kahn, R.P., "Technologies To Maintain Bio- 

 logical Diversity: Assessment of Plant Quaran- 

 tine Practices," OTA commissioned paper, 

 1985. 



61. Kaiser, W.J., "Plant Introduction and Related 

 Seed Pathology Research in the United States," 

 Seed Science and Technology 11:197-212, 

 1983. 



62. Kartha, K.K., "Meristem Culture and Germ- 

 plasm Preservation," Cryopreservation of Plant 

 Cells and Organs, K.K. Kartha (ed.) (Boca Ra- 

 ton, FL: CRC Press, 1985). In: Towill, et al., 

 1985. 



63. King, M.W., and Roberts, E.H., The Storage 



of Recalcitrant Seeds — Achievements and Pos- 

 sible Approaches (Rome: International Board 

 for Plant Genetic Resources, 1979). 



64. King, M.W., and Roberts, E.H., "The Desicca- 

 tion Response of Seeds of Citrus limon L.," An- 

 nals of Botany 45:489-492, 1980. In: Towill, et 

 al., 1985. 



65. Konopka, J., and Hanson, J. (eds.). Documen- 

 tation of Genetic Resources: Information Han- 

 dling Systems for Genebank Management (Rome: 

 International Board for Plant Genetic Resources, 

 1985). 



66. Koopowitz, H., Developmental and Cell Biol- 

 ogy, University of California, Irvine, personal 

 communication, August 1986. 



67. Larkin, P.J., and Scowcroft, W.R., "Somaclonal 

 Variation: A Novel Source of Variability From 

 Cell Cultures for Plant Improvement," Theroet. 

 Appl. Genet. 60:197-214, 1981. 



68. Lucas, G., Royal Botanical Gardens, Kew, Eng- 

 land, personal communication. May 1986. 



69. Lucas, G., and Oldfield, S., "The Role of Zoos, 

 Botanical Gardens and Similar Institutions in 

 the Maintenance of Biological Diversity," OTA 

 commissioned paper, 1985. 



70. Lyman, J.M., "Progress and Planning for Germ- 

 plasm Conservation of Major Food Crops," Plant 

 Genetic Resources Nev^rsletter 60:3-21, 1984. 



71. McMahan, L., Center for Plant Conservation, 

 Boston, personal communication, August 1986. 



72. Melchers, G., Saeristan, M., and Holder, A. A., 

 "Somatic Hybrid Plants of Potato and Tomato 

 Regenerated From Fused Protoplasts," Carls- 

 berg Res. Comm. 43:203-218, 1978. 



73. Oldfield, M.L., The Value of Conserving Ge- 

 netic Resources (Washington, DC: U.S. Depart- 

 ment of the Interior, 1984). 



74. Orton, T.J., "Somaclonal Variation: Theoreti- 

 cal and Practical Consideration," Gene Manip- 

 ulation in Plant Improvement, J. P. Gustafson 

 (ed.) (New York: Plenum Press, 1984). In: Or- 

 ton, 1985. 



75. Orton, T.J., "New Technologies and the En- 

 hancement of Plant Germplasm Diversity," 

 OTA commissioned paper, 1985. 



76. Peacock, W.J., "The Impact of Molecular Bi- 

 ology on Genetic Resources," Crop Genetic Re- 

 sources: Conservation and Evaluation, J.H.W. 

 Holden and J.T. Williams (eds.) (London: George 

 Allen & Unwin, 1984). 



77. Plucknett, D.L., and Smith, N.H., "Sustaining 

 Agricultural Yields," BioScience 36:40-45, 

 1983. 



78. Plucknett, D.L., Smith, N.J.H., Williams, J.T., 



