نتایج جستجو برای: molecular trees

تعداد نتایج: 721199  

2008
Seung-Jin Sul Tiffani L. Williams

Different phylogenetic methods often yield different inferred trees for the same set of organisms. Moreover, a single phylogenetic approach (such as a Bayesian analysis) can produce many trees. Consensus trees and topological distance matrices are often used to summarize the evolutionary relationships among the trees of interest. These summarization techniques are implemented in current phyloge...

.  Introduction Old trees are important and key elements of forest sites and are of great value in terms of forest management, reforestation, silviculture and ecology. Although old trees constitute a small percentage of forest trees, they account for a large share of forest carbon reserve and play a vital role in carbon storage. Understanding the how geographical and site distribution of thes...

Journal: :Discrete Applied Mathematics 2008
Hua Wang

The Wiener index of a graph is the sum of the distances between all pairs of vertices, it has been one of the main descriptors that correlate a chemical compound’s molecular graph with experimentally gathered data regarding the compound’s characteristics. In [1], the tree that minimizes the Wiener index among trees of given maximal degree is studied. We characterize trees that achieve the maxim...

Journal: :Evolution; international journal of organic evolution 2006
T Jonathan Davies Vincent Savolainen

The neutral theory of molecular evolution predicts that rates of phenotypic change are largely independent from genotypic change. A recent study by Bromham et al. (2002) confirmed this expectation, finding no evidence for correlated phenotypic and molecular evolutionary rates in animals. We reevaluate this hypothesis, sampling at different taxonomic levels in plants and animals, using Bayesian ...

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