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Analysis of the Karyotype and C-banding Pattern in Elytrigia intermedia (Host) Nevski

HUANG Ying1,MAO Pei-sheng1,MENG Lin2,ZHANG Guo-fang2,MAO Pei-chun2 (1.Department of Grassland science,China Agricultural University,Beijing 100193,China;2.Beijing Research and Development Center for Grass and Environment,Beijing Academy of Agriculture and Forestry,Beijing 100097,China)  
The plants of genus Elytrigia Desv.are widely distributed throughout the world and represented with species of diploids,tetraploids,hexaploids,octaploids,and decaploids.The karyotype and C-banding pattern of three germplasms of Elytrigia intermedia(Host) Nevski were compared and analyzed.The results of karyotype analysis show that the karyotype formula for EI015 was 2n=4x=28=2M+10m+16sm,for EI021 2n=4x=28=4M+22m(sat)+2sm,and for EI038 2n=4x=28=4M+12m+12sm(sat),and the dissymmetry of all their karyotypes belonged to 2A type.The result of C-banding analysis show that the C-banding pattern for EI021 was 2n=28=5C+2CT++2CT++4T++2T++1CS++12;for EI038 was 2n=28=2S++4T++1CT++1T++20;but there was no C-banding for EI015.According to the results of the karyotype and C-banding pattern analysis,the karyotype of EI021 was different from the other two germplasms which were close,but the C-banding pattern was different obviously between EI015 and EI038.The kinship was not close among three germplasms based on the comparison of the C-banding analysis which could impersonally reflect the chromosome difference.
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