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品种的好坏、优劣直接影响农业生产，因此，选育的新品种在投入生产前需要进行 品比实验、生产试验和品种鉴定．这些工作实际上就是对选育的新品种进行综合的客观评价．基于 这种需要，本文给出了一种建立在主成分分析基础上的综合评价数学方法．应用这种方法对家蚕 ３０个品种进行综合评价，获得了与实际情况相当吻合的评价结果．根据评价值Ａｋ，将这３０个家 蚕品种分为４大类，Ａｋ＞７００的为优秀品种，７．００＞Ａｋ＞０的为优良品种，０＞Ａｋ＞－７．００ 的为低劣品种，而Ａｋ＜－７．００则为极低劣品种．
Variety is good or bad, the merits of a direct impact on agricultural production, therefore, the selection of new varieties need to put into production before the ratio test, production test and variety identification. These efforts are actually the objective and objective evaluation of the new breed of breeding. Based on this need, this paper presents a comprehensive evaluation method based on principal component analysis. This method was used to evaluate 30 varieties of silkworms comprehensively and obtained the evaluation results which are in good agreement with the actual situation. According to the evaluation value Ak, the 30 silkworm varieties were divided into four categories, Ak> 700 for the elite varieties, 7.00> Ak> 0 for the elite varieties, 0> Ak> -7.00 for the inferior varieties, While Ak <-7.00 is a very poor breed.