英文文献：Wheat Yield Response: On-farm Management versus Breeder Contributions-小麦产量反应:农场管理与育种者贡献
英文文献作者：Michalski, Joel,McCracken, Vicki A.
英文文献摘要：
Data from the WSU wheat variety test program along with spatially interpolated historic weather records present a unique opportunity to compare wheat variety performance across time and Washington State geography. A key assumption in this analysis takes wheat variety to be genetically constant year-over-year. This assumption allows us to separate breeding versus farm-level productivity gains. Furthermore, across the wide variety of climate regions within Washington State, productivity gains can be measured for different climate regions, allowing a unique contribution to the body of literature attempting to differentiate the various technology contributions to farm productivity. Analysis of breeder contributions to wheat productivity gains are then applied to state-wide USDA productivity data and determine the economic benefit provided by the wheat variety improvements to average $1.8M per year (2010 dollars).

来自WSU的小麦品种测试项目的数据以及空间插值的历史天气记录提供了一个独特的机会来比较小麦品种在不同时间和华盛顿州地理上的表现。这一分析的一个关键假设是小麦品种在遗传上每年都是恒定的。这一假设使我们能够区分育种和农业生产力的提高。此外，在华盛顿州范围广泛的不同气候区域，生产力的提高可以被测量到不同的气候区域，这使得那些试图区分不同技术对农业生产力的贡献的文献有了独特的贡献。然后将育种者对小麦生产力提高贡献的分析应用到美国农业部的全国生产力数据中，并确定小麦品种改良提供的经济效益为每年平均180万美元(2010年美元)。