Search academic texts

Information × Registration Number 0219U101376, 0118U001900 , R & D reports Title The molecular genetic and cytogenetic analysis of invasive populations of Ulmus pumila L. and Ulmus suberosa Moench. popup.stage_title Head Pirko Yaroslav V., Кандидат біологічних наук Registration Date 12-07-2019 Organization Institute of Food Biotechnology and Genomics of the National Academy of Sciences of Ukraine popup.description2 The genetic structure of three populations of Ulmus pumila L. and one Ulmus suberosa Moench was studied (20 trees each) in Steppe Prydniprovia using molecular genetic analysis using DNA markers (microsatellites and intron polymorphism of β-tubulin genes - TBP). As a result of the analysis features of the genetic structure of populations and differences in individual genetic loci were revealed. The lowest values of indicators characterizing the genetic polymorphism of U. pumila, both in microsatellite loci and TBP markers, are characteristic of trees that grow in more favorable conditions (vacant lot) compared to environmentally loaded ones. The observed heterozygosity was lower than expected due to an excess of homozygous genotypes. In general, it was found that, for most of the studied U. pumila loci in the Dnieper region, there is a relatively low level of genetic variation. U. suberosa found alleles that were absent in U. pumila. The U. suberosa trees for all studied markers turned out to be monomorphic. As a result of cytogenetic studies, it was found that the populations of the U. pumila and U. suberosa trees differ in terms of embryonic death and seed viability. Two of the three studied U. pumila populations were characterized by low rates of embryonic death of seedsand high seed viability index. The low level of chromosomal rearrangements in vegetative meristems also indicates genetic homeostasis and the absence of hybridization in U. pumila. U. suberosa trees had high rates of embryonic death of seeds and low seed viability indices. Seed reproduction of the population of this species is significantly limited. Product Description popup.authors Bilonozhko Yuliya O. Blume Yaroslav B. Kalafat Liubov O. Kravets Olena A. Pirko Nadija М. Pirko Yaroslav V. Postovoytova Anastasiya S. Rabokon Anastasiia M. popup.nrat_date 2020-04-02 Close