Studies on Chromosome Karyotype and Polyploid Induction of Vegetable Jute

The well-spread and clear mitotic metaphase chromosomes of jute were obtained.The karyotype analysis showed that jute was diploid(2n=2x=14).The total length of jute's chromosome was 21.36 μm and the average length was 3.05 μm.The arm ratios were all between 1~1.7,meaning that their chromosomes belonged to the centromere of chromosomes,and the fourth pair of chromosomes had a pair of accompanying bodies.The karyotype formula was 2n=2x=14=12m+2m(SAT).In addition,the germination time of the jute seeds soaked with different concentrations of colchicine solution,would be delayed with the concentration increased.The autotetraploid and hexaploid of the jute could be observed when treated with 0.1% colchicine solution.