橡胶树两个品种的核型分析

Karyotype Analysis of Two Varieties in Hevea brasiliensis

摘要: 热研7-33-97(Hevea brasiliensis,热研7-33-97)和RRIM600(Hevea brasiliensis,RRIM600)都是大规模推广种植的优良橡胶树品种,对其核型研究在橡胶树育种中有着重要的意义。采用去壁低渗方法对热研7-33-97和橡胶栽培品系RRIM600的染色体数目与核型进行了研究。结果表明:热研7-33-97的染色体核型公式为2n=36=34m(4sat)+2sm,核型为2B型。RRIM600的染色体核型公式为2n=36=28m(4sat)+8sm,核型为2B型。热研7-33-97和RRIM600的核型在进化上属于比较原始的类型。该研究可为橡胶树育种、种质资源鉴定及基因定位提供细胞学基础。

Abstract: Reyan 7-33-97(Hevea brasiliensis,Reyan 7-33-97)and RRIM600(Hevea brasiliensis,RRIM600)were large-scale of the extension cultivation of choiceness,and their karyotype analysis was important in breeding.Karyotypes Reyan 7-33-97and RRIM600 were analysed with the enzyme and low osmotic method.The karyotype formula of Reyan 7-33-97 was 2n=36=34m(4sat)+2sm.Which belonged to 2B type.As to RRIM600,the karyotype formula of RRIM600 was 2n=36=28m(4sat)+8sm.The karyotype RRIM600 was also belong to 2B type.The karyotype formulas of Reyan 7-33-97 and RRIM600 were relatively original during genome evolution.The study will provide cytological basis for the breeding,germplasm analysis and gene location of Hevea brasiliensis Muell.Arg.