نتایج جستجو برای: cladistic
تعداد نتایج: 1062 فیلتر نتایج به سال:
Wood anatomy is an important source of systematically informative character information that can and should be used in cladistic phylo genetic analyses ofrelationships in flowering plants. However, the re sults ofa cladistic analysis are only as good as the characters and obser vations, which together comprise the data set that is analyzed. The goal of this paper is to address the former of ...
جنس . thalictrum l بر اساس بررسی منابع و نمونه های هرباریومی و همچنین نمونه های جمع آوری شده توسط مؤلفین مورد بازبینی قرار گرفت. با استفاده از آنالیز تجزیه به عامل ها و تعیین متغیرترین صفات یک کلید شناسایی برای گونه های پذیرفته شده در ایران تهیه شد. علاوه بر آن بر اساس 29 صفت کمی و کیفی ریخت شناسی، آنالیز خوشه ای با استفاده از روش وارد جهت تعیین جایگاه گونه ها در گروه های گونه ای انجام شد. علاو...
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Recently developed phylogeographic analyses that incorporate genealogical relationships of alleles offer the exciting prospect of disentangling historical from contemporary events. However, the relative advantages and shortfalls of this approach remain to be studied. We compared the nested cladistic method to the more traditional analysis of variance approach in a study of intraspecific genetic...
The distinctly non-random diversity of organismal form manifests itself in discrete clusters of taxa that share a common body plan. As a result, analyses of disparity require a scalable comparative framework. The difficulties of applying geometric morphometrics to disparity analyses of groups with vastly divergent body plans are overcome partly by the use of cladistic characters. Character-base...
The distinctly non-random diversity of organismal form manifests itself in discrete clusters of taxa that share a common body plan. As a result, analyses of disparity require a scalable comparative framework. The difficulties of applying geometric morphometrics to disparity analyses of groups with vastly divergent body plans are overcome partly by the use of cladistic characters. Character-base...
In case-control studies, genetic associations for complex diseases may be probed either with single-locus tests or with haplotype-based tests. Although there are different views on the relative merits and preferences of the two test strategies, haplotype-based analyses are generally believed to be more powerful to detect genes with modest effects. However, a main drawback of haplotype-based ass...
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