摘要
利用AFLP和RFLP技术对 2 0个水稻品种 (系 )进行了遗传多样性分析。在AFLP分析中 ,用 6 4对引物组合进行了初筛 ,然后用其中适合水稻的 15对引物进行了详细研究 ,每对AFLP引物组合扩增出了 4 7～ 118条带 ,其中多态性带为 5～ 32条 ,15个引物组合共得到多态性条带 2 99条 ;在RFLP分析中 ,4 9个RFLP探针共检测出 10 7条多态性带。聚类分析表明 ,两种标记均能将 2 0个材料分成籼粳两大类群 ,但AFLP标记比RFLP标记更能反映品种间系谱亲缘和地理生态上的差异。两种标记检测出的遗传距离的趋势是一致的 ,但AFLP标记相对于RFLP而言提高了品种间的遗传距离的估计 ,降低了亚种间遗传距离的估计 ,因此 ,AFLP更适应于多样性的研究 。
AFLP and RFLP were used to study the diversity of 20 rice cultivars. 15 primer combinations were used in the AFLP analysis and 47-118 bands were amplified in each lane. A total of 107 polymorphic bands were detected in the RFLP analysis using 49 RFLP probes. The cluster analysis based on RFLP data showed that 20 rice cultivars could be divided into an indica group and a japonica group, as did the AFLP data; however AFLP is more suitable in detecting the difference of pedigree and ecotype among the 20 cultivars. The genetic distance based on AFLP and RFLP data showed the same tendency, but AFLP markers increased the measure of genetic distance among intra-subspecific cultivars and decreased the measure of genetic distance among inter-subspecific cultivars relative to RFLP markers. That indicated that AFLP is more suitable than RFLP in the diversity study and RFLP is more suitable to study the indica-japonica differentiation of cultivars.
出处
《中国农业科学》
CAS
CSCD
北大核心
2002年第6期589-595,共7页
Scientia Agricultura Sinica
基金
国家重点基础规划 (973 )项目 (2 0 0 1CB10 880 0 )
