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运用常规的根尖细胞压片法，对４种豆科牧草的染色体数目、核型进行了研究。建立的核型公式如下：伊犁苜蓿为２ｎ＝３２＝２８ｍ＋４Ｓｍ，黄花苜蓿为２ｎ＝３２＝３２ｍ，扭果苜蓿为２ｎ＝３２＝８ｍ＋４Ｓｍ，百脉根为２ｎ＝１２＝１０ｍ＋２Ｓｍ。
The chromosome number and karyotype of four species of leguminous forages were studied by conventional root tip cell tablet method. The established karyotype formula is as follows: 2n = 32 = 28m + 4Sm for Ili Medicago sativa, 2n = 32 = 32m for Medicago sativa, 2n = 32 = 8m + 4Sm for Medicago sativa and 2n = 12 = 10m + 2Sm for Lotus sativa.