基于线粒体细胞色素b基因序列的雀形目18种鸟系统发育关系  

Phylogenetic Relationship among 18 Passerines Based on Mitochondrial Cytochrome b Gene Sequences

作　　者：国会艳[1,2] 李玲[1,2] 马玉堃[1,3] 白素英[1] 

机构地区：[1]东北林业大学野生动物资源学院 [2]牡丹江师范学院牡丹江157012 [3]黑龙江大学生命科学学院哈尔滨150080

出　　处：《动物学杂志》2007年第2期32-38,共7页Chinese Journal of Zoology

基　　金：黑龙江省博士后基金(2001)

摘　　要：采用线粒体细胞色素b(cytochrome b)基因,利用DNA测序的方法研究了雀形目18种鸟类的分子系统发育关系。通过序列分析比对,运用邻接法和最大似然法构建了雀形目18种鸟类的系统发育树,结果表明,燕雀类和类的分歧程度达到了科级水平,建议分别独立成科;长尾山雀可从山雀科中分离出来,单列成科;柳莺归入柳莺亚科(Phylloscopinae),树莺归入大苇莺亚科(Acrocephalinae)。Cytb基因的各主要分支中存在着相对恒定的分子钟,根据鸟类mtDNA的cytb进化速度大约是每百万年1.6%,得到18种鸟的科间分歧时间在10.5百万年左右,科内分歧在9.0百万年左右。In the present study, the molecular systematic relationship among 18 passerines was studied based on sequences of mitochondrial cytochrome b genes. The phylogenetic trees of 18 passerines were made by neighbor joining （NJ） and maximum likelihood （ML） methods. The sequence difference among fringillids and emberizids made them independent and was categorized into different families, but not subfamilies. The Long-tailed Tits could be independent of Paridae and be categorized into Aegithalidae. Leaf Warbler could be categorized into Phylloscopinae and Buth Warbler was categorized into Acrocephalinae. There was a relatively constant molecular clock in the evolution of cyt b gene. Under the assumption of a ＂standard＂ molecular clock of 1.6 % sequence divergence per million year for mtDNA genes on average, a inter-familiar divergence time was expected to be 10.5 million years and the intra-familiar divergence time was expected to be 9.0 million years.

关 键 词：系统发育 细胞色素B 雀形目 

分 类 号：Q951[生物学—动物学] Q953