| 1. | There are three frequently used method : distance method , maximum parsimony method , and maximum likelihood method
目前常用的构建发生树的方法有三种,即距离法、最大简约法和最大似然法。 |
| 2. | Ching is not spine - like or irregularly baculate processes in < sporae pteridophytorum sinicorum > , should be lobate or curved - lobate processes on the perine
在最大简约法中，得到2棵步长为1246的同等最简约树的50 %多数原则一致树。 |
| 3. | The results are agreeable with morphological taxonomy . the software mega was used to analyze the molecular phylogeny and phylogenetic trees were constructed with the neighbor - joining method and the maximum parsimony method
对所得的基因序列用mega软件包进行系统进化分析， nj法和最大简约法( mp )构建毛冠鹿和麂属3种动物的分子系统进化树。 |
| 4. | Pairwise comparisons of uncorrected sequences distances and kimura 2 - parameter distances were calculated and molecular phylogenetic trees were reconstructed by using the neighbor - joining ( nj ) , maximum parsimony ( mp ) , maximum likelihood ( ml ) methods
分析了?科鱼类s7核糖体蛋白基因内含子2序列，计算了p - distance和kimura2 - parameter遗传距离，并用邻接法、最大简约法、最大似然法重建了?科鱼类分子系统树。 |
| 5. | Phylogeny analysis is performed with phylip software package and encoding sequence of bdnf gene . the phylogeny trees have been drawn with three different methods ( maximum parsimony method , genetic distance method and maximum likelihood method ) , respectively . the analysis outcomes are not all consistent for the reason that it is closely related to the selected methods and the conservative level of the sequences
采用不同的统计学分析方法，最大简约法( maximumparsimonymethod ) 、最大似然法( maximumlikelihoodmethod )和遗传距离法( geneticdistancemethod ) ，得到了物种系统发育进化树，但拓扑结构并不完全一致，这是可能是因为分子系统学研究与采用的分析方法和所选基因的保守程度即作为分子标记的可信度密切相关。 |
| 6. | 8 computer program , then used to calculate di stance matrix with kimura ' s two - parameter method and construct phylogenetic trees by applying neighbor - joining and maximum parsimony analyses using mega2 . 1 computer program . bootstrap analyses were carried out to evaluate statistical reliability based on 500 resamplings of the data set
新鲜或硅胶干燥样品被用于总dna提取并用于pcr反应， pcr扩增产物回收后直接用于测序反应，序列数据经chstalx1 . 8软件排序后，采用mega2 . 1软件根据kimura ’ s双因子法计算遗传距离，并应用邻接法( neighbour - jointing )和最大简约法( maximumparsimony )构建系统树， bootstrap法( 500次重复)评估分支可信度。 |
| 7. | The evolutionary characteristics of both stems and loops of 16s rrna gene partial sequence were analyzed . the kimura ' s 2 - parameter distances were calculated and molecular phlogenetic trees were reconstructed by using the neighbor - joining ( nj ) , maximum parsimony ( mp ) , maximum likelihood ( ml ) methods
分析了?科鱼类16srrna基因部分序列茎区( stemregions )和环区( loopregions )的进化特点；计算了kimura2 - parameter遗传距离；并用邻接法、最大简约法、最大似然法重建了?科鱼类分子系统树。 |
| 8. | Trifurcatum ought to be kicked out from this sect ; ( 3 ) a monophyletic group of x = 11 species was shown in the its tree ; ( 4 ) a . fasciculatum had a close relationship with x = 11 species ; ( 5 ) a . wallichii and a . macranthum had different evolution processes , their relationship was not so related ; ( 6 ) the sensible components of sect
采用邻接法( neighborjoiningmethod ) 、非加权配对算术平均法( upgma ) 、最大简约法( mostparsirnonymethod ) 、最小进化法( mininmmevolutionmethod )和最大似然法( maximumlikelihoodmethod ) ，通过定义和不定义外类群，以及选择不同数量的外类群对所得的序列数据进行分析，重建了分子系统树。 |
