STUDY OF GENETIC DIVERSITY IN POPULATIONS OF WHITE SHRIMP Litopenaeus vannamei NARIÑO PACIFIC BY RAPD TECHNIQUE

Abstract

The genetic variability of four populations of white shrimp (Litopenaeus vannamei) of Pacific Nariño Department coast (Tumaco region) by the genetic marker from four RAPD primers were estimated. Three natural populations (Salahonda, Curay, and La Ensenada de Tumaco) were selected, along with a hatchery population (La Carbonera). The results showed a number of different alleles (Na) between 1.013 and 1.178, with polymorphism rates between 49.04% and 55.41%. Gst values and ΦPT indicate that there are genetic differences between the populations studied. Φ_PT analysis between pairs of populations and Nei distances showed that the population on had higher genetic differentiation was hatchery population of La Carbonera. In contrast, the most similar populations were the natural populations of La Ensenada and Salahonda. Curay population showed greater differentiation between natural populations. Analysis of molecular variance AMOVA indicated that the variability found is due to a greater percentage (58%) to differences within-population, while a smaller percentage change (42%) is due to inter-population differences.