使用SSI模型描述昆虫温发育速率的SAS程序
A SAS procedure for estimating parameters of the SSI model describing temperature-dependent developmental rates in insects
时培建1, 2** 戈 峰1 ***
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DOI：10.7679/j.issn.2095-1353.2014.198
作者单位：1. 中国科学院动物研究所 农业虫害鼠害综合治理研究国家重点实验室，北京 100101；2. 南京林业大学 竹类研究所，南京 210037
中文关键词：棉铃虫，发育时间，参数拟合，温环境，内禀最适发育温度
英文关键词： cotton bollworm, developmental time, parametric fitting, thermal environment, intrinsic optimum temperature for development
中文摘要：
Sharpe-Schoolfield-Ikemoto（SSI）模型是用来描述温度对昆虫发育速率影响的一个重要数学方程，它既能够很好地拟合温发育速率的数据，又能提供若干个重要温参数，特别是内禀最适发育温度（TΦ）。此温度反映了昆虫生存的最佳温环境。然而，由于SSI模型的参数过多，结构显得较为复杂，给实际的数据拟合带来了困难。一个基于R平台的软件包已经被开发出来，专门用于执行SSI模型的参数拟合。但目前由于国内许多研究者青睐于使用SAS统计软件，所以本文提供了一个基于SAS统计软件的程序，用以快速拟合SSI模型的参数。通过拟合棉铃虫Helico-verpa armigera Hübner蛹期的温发育速率数据，发现此SAS程序具有很好的拟合效果，同时进一步证明了SSI模型对描述温度对昆虫发育速率影响的有效性。
英文摘要： The Sharpe-Schoolfield-Ikemoto (SSI) model is a very important mathematical equation that is widely used to describe the effect of temperature on the developmental rates of insects. This model is not only a good fit to data on temperature-dependent developmental rates, but also provides estimates of several valuable thermal parameters, especially the intrinsic optimum temperature for development (TΦ) that indicates the optimal thermal environment for a specific insect species. However, the SSI model has considerable difficulty in estimating parameters then making it rather complex to use. A package for estimating these parameters has been developed based on the statistical software R. Because some domestic resea-rchers might prefer to use the statistical software SAS, we here present a practical SAS procedure for quickly estimating SSI model parameters. This procedure exhibited satisfactory goodness of fit to the temperature-dependent developmental rates of male pupae of cotton bollworms. These results further demonstrate the validity of the SSI model for describing the effect of temperature on insect developmental rates.