Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Phylogenetic studies in some selected groups of Squamates in semi arid region of Agra

Auteur : Sharma, Utpala

Université de soutenance : Dayalbagh Educational Institute (Deemed University)

Grade : Doctor of Philosophy (PhD) 2015

Résumé partiel
The main part of diverse terrestrial vertebrates in the world consist of squamates reptiles which are around 200 amphisbaenian, 4900 lizard species and 3070 snake species. In recently done research investigations, the conventional relationships pertaining to higher-level groups have been drawn is under question ? For nineteen taxa demonstrating the entire major ancestry, the prolonged molecular information consist of nucleotide sequences, In order to sample the major squamates lineage, containing amphisbaenian families, all lizards, and majority of snake families, where they found out some alternative relationships Vidal and Hedges performed the initial molecular study in the early part of 2004. The conventional relationship of serpents with also the monitor lizards or worm lizards was consequently, discarded. In addition, the conventional squamates dichotomy among iguania and scleroglossa was also not sustained. As per the theory of neutral mutation, in order to explain various levels of useful limitation transversely nucleotide sequences, the heterogeneities within a phylogenetic pedigree transversely genomes, nucleotide sites, and genes are defined which is probably with difference in fundamental rate of transformations. Population genetics described genetic difference between species, and its population, it depicts the allocation of genetic inconsistency affected through various factors which are evolutionary collision of transformation, movement and their relations with huge population. A phylogenetic study of character disarticulation in a number of cnemidophorus lizards was done by (Radtkey et al., 1997). A nuclear marker helpful for squamata phylogenetic study described by Saint et al., 1998. Kuo et al., 1999 gave appearance of LDH-C allozyme between Lizard Taxa : Evolutionary propositions for the eukaryotes LDH gene family.

Présentation et version intégrale (Shodhganga)