中文摘要：

以木薯品种SC124为试材，采用RT-PCR的方法，克隆了木薯可溶性淀粉合成酶基因SSII的全长，并对其进行生物学分析。结果表明：克隆的基因全长包含完整的开放阅读框2256bp，编码751个氨基酸，通过核苷酸序列同源性分析，该cDNA与基因库中登录的木薯SSII（登录号为：EF667961．1）序列同源性达到99％，但与其它植物的同源性较低，为77％～84Yd。对木薯SSII多态性分析可知，在木薯基因组内存在等位基因及旁系同源基因。

英文摘要：

Taking Manihot esculenta Crantz cultivar SC124 as material,by RT-PCR technology, the whole sequeee of SSII gene was firstly obtained. The results showed that the gene contained an 2 256 bp open reading frame （ORF） of SSII and encoding 751 amino acids. Comparaing to the published sequence（EF667961. 1）, the homology of nucleotide sequence could shares 99 %. However,the homology was low comaraing with other plants,about 77%-84%. The analysis of SSII polymorphism showed that there were alleles and paralogous gene in Manihot esculenta Crantz gene groups.