玉米自交系种质类群划分及其分析

以60份玉米自交系材料为供试品种，调查了株高、穗位高、穗长、穗粗、穗行数、行粒数、百粒重、稿上位叶面积、穗中位叶面积、穗下位叶面积和抽雄期共儿个性状。对得到的各自交系性状均值采用SPSS中的Ward方法进行聚类分析。结果表明，通过表型性状进行玉米自交系聚类，其结果在很大程度上反映的是综合性状的差异性。初步结论认为，Mo17、自选系-1、W59(长)、海104、海儿、95海-1、444、沱219、107、112、利德、庆7、7732G、BHP48、783/黄、Mo14/O2、F83、吉856／O2：等综合性状较好，在育种上有较高的利用价值；自选系-3的利用价值较小，应淘汰；其余的自交系还有待于进一步改良。

Germplasm Classification and Analysis of Maize Inbred

Using 60 inbred lines of maize as materials,the data of plant height, ear height, earlength, ear diameter, row number per ear, kernel number per row, weight of 100 grain,leafarea above the ear, leaf area of the ear, leaf area under the ear and head sprouting was investigated. Cluster analysis was carried out based on the 11 characteries and the results reflected the differences of comprehensive traits in the most part .The current study indicated that the comprehensive traits of Mol7, self-made line-l, W59 (long), Hail04, Hai 11, 95Hai-1,444, Tuo219, 107, 112, liDe, Qing7, 7732G, BHP48, 783/yellow, Mo14/O_2, F83, Ji856/O_2 are fine .which have a high used value in breeding. Self-made line-2 must be eliminate for its low used value. The other still need to improve.