Searching an Ex Situ Collection of Wheat Genetic Resources
建立理论模型，利用实际数据研究在异地收藏的小麦遗传资源中搜寻抗病虫害特性的价值，发现育种者很少使用基因库并不意味着边际价值低，传统育种的高转移成本使得某些资源长期“闲置”可能是有效率的。
Abstract A theoretical model is developed and applied to the search for disease and pest resistance in ex situ collections of wheat genetic resources, employing actual data on frequency distributions, disease losses, and search costs. Experiments developed from case studies clarify several misperceptions about the value of gene banks and their utilization by breeders. The observation that wheat breeders “use” gene banks rarely does not imply that marginal accessions have low value. High costs of transferring genes with conventional breeding techniques mean that it may be efficient to store certain categories of genetic resources (such as landraces) “unused” for many years.