GENETIC VARIATION FOR HOST PREFERENCE WITHIN AND AMONG POPULATIONS OF DROSOPHILA TRIPUNCTATA

Food preference in Drosophila robusta and Drosophila tripunctata following desiccation

Genetic Variation Within PoPulations

Seven microsatellite loci were used to develop multilocus genotypes for 49 individuals of Neotoma stephensi (Stephen’s woodrat) collected from nine sites in central and northern Arizona. Several statistical analyses were used to determine genetic structure, levels of genetic variability, and degree of relatedness. Structure analyses estimated two distinct groups within localities. The FST value...

Genetic variation within and among populations of Arabidopsis thaliana.

We investigated levels of nucleotide polymorphism within and among populations of the highly self-fertilizing Brassicaceous species, Arabidopsis thaliana. Four-cutter RFLP data were collected at one mitochondrial and three nuclear loci from 115 isolines representing 11 worldwide population collections, as well as from seven commonly used ecotypes. The collections include multiple populations fr...

Variations in Host Preference among and within Populations of Heterodera trifolii and Related Species.

Seven populations of Heterodera trifolii from Arkansas, Kentucky, Pennsylvania, and Australia plus 3 or 4 single-cyst isolates (SCI) from each population were tested for reproduction on seven species of plants to compare the host preferences among and within populations. Common lespedeza, Kummerowia striata cv. Kobe, was a good host for all populations and isolates. Therefore, a plant was consi...

Population Genetics of Drosophila: Genetic Variation and Differentiation among Indian Natural Populations of Drosophila ananassae

Sanjay Kumar and Arvind Kumar Singh (2017) Genetic subdivision in natural populations of animals including Drosophila can be well understood by studying the role of evolutionary forces like natural selection, migration and genetic drift which are mainly responsible for the change in their genome. Drosophila ananassae is a cosmopolitan and domestic species and is one of the prevalently occurring...