百合目叶绿体rbcL基因核苷酸替代速率检测  

Relative Rates of Nucleotide Substitution at The Chloroplast rbcL Sequences among Liliales

作　　者：陈士超[1] 杨红[1] 郭光普[1] 桂馨[1] 张楫钦[1] 

机构地区：[1]同济大学生命科学与技术学院,上海200092

出　　处：《西北植物学报》2007年第12期2379-2384,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：同济大学医科基金项目(2000219017);SITP创新项目资助

摘　　要：分析了百合目主要类群叶绿体中编码核酮糖1,5二磷酸羧化氧化酶大亚基rbcL基因的42条序列,使用RRTree相对速率检测方法,详细研究rbcL基因在百合目7科间同义替代速率和非同义替代速率的变化.相对速率检测显示:百合目内秋水仙科(Colchicaceae)的同义替代速率和非同义替代速率均最快,金梅草科(Campynemat-aceae)同义替代速率最慢,百合科(Liliaceae)的非同义替代速率最慢,但在百合目各科间,无论同义替代速率还是非同义替代速率差异均不显著.Extensive variation in synonymous and non-synonymous substitution rates were observed among 42 sequences of the gene coding for the large subunit of ribulose-1,5-bisphosphate carboxylase （rbcL） representing major clade in Liliales taxa by RRTree method. Relative-rate tests revealed that the Colchicaceae have the most rapid substitution rate at both synonymous and non-synonymous sites in the rcbL sequences; The Campynemataceae and Liliaceae have the lowest synonymous and non-synonymous substitution rates, respectively. However,both synonymous and non-synonymous substitution rates in the rbcL sequences exhibit no significant heterogeneity within the Liliales.

关 键 词：百合目 RBCL 相对速率检测 系统发育 

分 类 号：Q789[生物学—分子生物学]