Study on the cytological effect of Medicago sativa embarked by satellite Shijian8

The dry seeds of 8 alfalfa varieties embarked by satellite Shjian 8 were used to study the cytological effect and the results indicated that the mitosis of root tip cell was increasedl, the biological damage of mitosis was increased and Longmu803 was the highest, Caoyuan 1 was the lowest. At the same time, there were different chromosome aberrations in root tip cells, including chromosome fragment, dissociative chromosomes, chromosome conglutination, lagging chromosome etc, the chromosome fragment was the main aberration type. The chromosome aberration rate of Pleven 6 was the highest and Zhaodong was the lowest. It could be concluded that Pleven6 was the most sensitive and Zhaodong was the most inactive varieties.