Evolutionary models addressing interaction between genetics and morphology propose
that during development, morphological traits of organisms are under canalization
selection resulting in constancy in morphology through evolutionary time. The
hypothesis of genetic homeostasis predict that because of developmental buffering
effects of heterosis, high level heterozygosity results in low level of morphological
variance from the norms of canalized shape of the population. The aim of the present
study is to test whether the variation in shape of organisms is negatively correlated with
genetic variation in Pseudophoxinus populations. Sample collection was performed
from eight localities for four different Pseudophoxinus species (P. crassus, P. battalgili,
P. egridiri, P. sp) in Central and South Anatolia in summer period of 2006. Shape
variation of the specimens was determined using geometric morphometric methods.
Genetic variation was based on six microsatellite and ten allozyme loci. All the
microsatellite loci were found to be polymorphic. However, the percentage of
monomorphic locus for allozymes varied from 90% to 60% per population. Statistically
significant negative correlation was observed between shape and genetic variation
derived from microsatellite data. However, this was not the case for allozyme
heterozygosity / there wasn&rsquo / t any significant relationship between shape variation and allozymes heterozygosity. Low number of polymorphic loci observed in allozymes may
prevent to reveal possible relationship between shape and genetic variations. As a result,
the present study confirmed the hypothesis of genetic homeostasis for microsatellite
data.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12610125/index.pdf |
| Date | 01 November 2008 |
| Creators | Telli, Murat |
| Contributors | Kence, Aykut |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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