Ten traits of 1-year seedlings of 20 families of Melia azedarach collected in Jiangsu, Shandong, Henan and Fujian province, including height, ground diameter, length of primary root, length of the longest lateral root, number of roots and leaves, fresh weight of roots, stems and leaves, were measured and analyzed. The results indicated that 9 traits had significant difference except the length of the longest lateral root. Based on comprehensive analysis, the membership degree of M. azedarach families are in the order as follows: Jiangning0802 > Sheyang0801 > Lishui0803 > Funing0802 > Wuyishan0804 > Dongtai0801 > Dongtai0803 > Sheyang0804 > Tongshan0702 > Zhaoyuan0804 > Wulian0801 > Ganyu0802 > Dafeng0701 > Pingdu0805 > Binhai0801 > Zhucheng0802 > Guanyun0703 > Wulian0803 > Jiaozuo0801 > Hongze0704.%对江苏、山东、河南、福建4省采集的20个苦楝(Melia azedarach)家系1年生实生苗苗高、地径、根幅、主根长、最长侧根长、根数、叶片数、根鲜重、茎鲜重和叶鲜重等10个性状进行测定和分析.结果表明:除最长侧根长外,各供试苦楝家系的其余9个性状均存在极显著差异；供试苦楝家系隶属度综合分析排序结果为:江宁0802＞射阳0801＞溧水0803＞阜宁0802＞武夷山0804＞东台0801＞东台0803＞射阳0804＞铜山0702＞招远0804＞五莲0801＞赣榆0802＞大丰0701＞平度0805＞滨海0801＞诸城0802＞灌云0703＞五莲0803＞焦作0801＞洪泽0704.
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