为巨菌草的种质鉴定、遗传育种和亲缘关系提供一定的细胞学基础，采用传统压片法，对象草（Pennisetum purpureum schumach）和巨菌草〔Pennisetum giganteum z．x．lin（暂定名）〕的染色体数目及核型进行分析。结果表明：象草和巨菌草的染色体形态较为一致，大部分由中部（m）和近中部（sm）着丝粒的染色体组成，象草和巨菌草的核型公式分别为2 n＝4 x＝28＝20 m＋8 sm 和2 n＝4 x＝28＝16 m＋8 sm＋4 st；染色体相对长度组成分别为2 n＝4 x＝28＝6 L＋6 M2＋10 M1＋6 S 和2 n＝4 x＝28＝4 L＋8 M2＋10 M1＋6 S，染色体基数和总数目一致，核型分类均为2 A 型，不对称系数为58％～60％，均属于较原始的类型。结论：象草和巨菌草的的染色体无明显差异性，从细胞染色体水平上认为两者亲缘关系较近。
Karyotype Analysis of Pennisetum purpureum and Pennisetum giganteum
To provide certain cellular basis for germplasm, breeding and genetic kinship of P .giganteum,The karyotype analysis and chromosome number of P .purpureum and P .giganteum were conducted by traditional squash method.The results showed that the karyotype morphology of materials were similar,consisted of metacentric chromosomes and sub-metacentric chromosomes mostly.In this study, the karyotype formulas of P . purpureum and P . giganteum were respectively 2 n=4 x=28=20 m+8 sm,2 n=4 x=28= 16 m+8 sm+4 st.Constitutions of relative length of two plants were 2 n=4 x=28=6 L+6 M2 + 10 M1 +6 S,2 n=4 L+8 M2 + 10 M1 + 6S.The karyotype of P .purpureum was the same as that of P .giganteum in chromosome basic number and total number.And two varieties were classed as 2A.The asymmetry coefficient were in the range of 58% to 60%,which demonstrated basic symmetry karyotypes. Conclusion: Both of the two plants had no significant differences in chromosomes between them and the relationship between them was close from cellular level.
NETL
NSTL
万方数据
维普
