中国连珠藻属Sirodotia(红藻门)的分支分类研究  

Studies on Cladistics of Sirodotia (Batrachospermum, Rhodophyta) in China

作　　者：谢树莲[1] 

机构地区：[1]山西大学生命科学与技术学院,山西太原030006

出　　处：《山西大学学报（自然科学版）》2005年第3期230-232,共3页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(30270119;30470118);山西省自然科学基金(20021079)

摘　　要：以连珠藻属Sirodotia Keylin的7个分类单位加上外类群作为研究对象,选取10个性状作为数量指标,得到10×7的数值矩阵,以分支分类学的方法对连珠藻属的系统发育过程进行分析.采用最大同步法、综合分析法、演化极端结合法及最小平行进化法进行分支分析,其中,最大同步法、综合分析法和演化极端结合法三种方法的运算结果完全一致,分支图最大步长为36,最小步长为11,实际步长为14,简约系数为0.12.在连珠藻属中,以黄山连珠藻S.huangshanensis最为原始,瑞典连珠藻S.suecica和细连珠藻S.tenuissima则较为进化.The phylogenetic relationships in Sirodotia Keylin were studied by using the principles of cladistic analysis. In the analysis, 7 taxa （including outgroup） were selected and 10 attributes were used.A data matrix consisting of all the extant 7 taxa and 10 attributes was analyzed by using Maximal Same Step Length Method, Synthetic Method, Evolutionary Extremal Aggregation Method and Minimal Parallel Evolutionary Method, respeetively, and the results from Maximal Same Step Length Method,Synthetic Method and Evolutionary Extremal Aggregation Method are accordant. In the cladogram the maximal step length is 36, the minimal step length is 11, the actual step length is 14 and the parsimony coefficient is 0. 12. The results suggest that S. huangshanensis is the most primitive and S. suecica and S. tenuissima are advanced.

关 键 词：系统发育 连珠藻属 串珠藻目 分支分析 

分 类 号：Q949[生物学—植物学]