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本文对苏丹草[Sorghumsudanense（Piper）Stapf]种内的黑壳（黑颖）、红壳（红颖）、白壳（白颖）3种类型进行染色体数目及核型研究，结果表明3种不同类的苏丹草染色体数目均为2n＝20，核型公式均为Zn＝4x=18m＋2SAT，其染色体均为中部染色体，均具有一时带随体染色体，核型类型均为1A型，属于较对称性核型。苏丹草在种内其染色体及核型特征无明显差异。苏丹草与同属植物高梁的染色体、数目及核型特征有明显的属内一致性。
In this paper, the chromosome numbers and karyotypes of black shell, red shell and white shell in Sorghumsudanense (Piper) Stapf were analyzed. The results showed that there were three different The genus Sudan grass chromosome number is 2n = 20, the karyotype formula is Zn = 4x = 18m + 2SAT, the chromosomes are the central chromosomes, both have a temporal chromosome with karyotype are 1A type, are more symmetrical Karyotype. Sudan grass in the species of its chromosome and karyotype characteristics no significant difference. Sudan grass and the same genus sorghum chromosomes, number and karyotype characteristics of the obvious intra-genomic consistency.