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Karyotype Analysis of Pennisetum purpureum and Pennisetum giganteum

ZHU Dandan;WANG Peidan;LIN Xingsheng;LIN Hui;SU Dewei;LIN Zhanxi;College of Life Science,Fujian Agriculture and Forestry University;China National Engineering Research Center of Juncao Technology;  
To provide certain cellular basis for germplasm,breeding and genetic kinship of P.giganteum,The karyotype analysis and chromosome number of P.purpureumand 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 respectively2n=4x=28=20m+8sm,2n=4x=28=16m+8sm+4st.Constitutions of relative length of two plants were 2n=4x=28=6L+6 M2+10 M1+6S,2n=4L+8 M2+10 M1+6S.The karyotype of P.purpureum was the same as that of P.giganteumin 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.
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