Changes in the frequencies of chromosome inversions in experimental populations of Drosophila pseudoobscura

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Fotografía de portada: Los Silphidae son una familia de coleópteros muchos de los cuales se alimentan de carne muerta. Entierran pequeños trozos de carne donde sus huevos son depositados por esta razón son conocidos como escarabajos enterradores.
Published: Nov 30, 2020
DOI: https://doi.org/10.26807/remcb.v41i2.882
Keywords:
Drosophila pseudoobscura, chromosomal polymorphism, temporal changes

Main Article Content

Víctor Salceda
ININ

Abstract

Temporal fluctuations in four experimental populations of Drosophila pseudoobscura were determine, from polytene chromosomes genotypes and relative frequencies were calculate during 4-6 monthly samplings. Populations of this species show 2-3 main inversions with joint frequencies of 90% of the total and of 4-7 secondaries that complete the sample. The changes occur mainly in the main components, causing oscillations through time. The following changes were obtaine: Tulancingo population, TL investment (Tree Line) goes from 54 to 70% and its counterpart CU (Cuernavaca) from 34 to 17%. Population Zirahuén, SC (Santa Cruz) from 34 to 36%, TL from 25 to 30% and CU from 23 to 5% and from the secondary OA (Oaxaca) from 10 to 5% and EP (Estes Park) from 3 to 12 %. Population Xochimilco CU from 51 to 16%, TL from 33 to 44%, EP from 8 to 10% with an intermediate maximum of 17% and OL (Olympic) from 1 to 18%. Nevado de Colima SC population from 65 to 45% with maximum oscillation of 74%, TL from 20 to 29% and a minimum of 16%, OL from 5 to 17%. In general, in the four populations the rest of the secondary investments fluctuated on average two percent.

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How to Cite
1.
Salceda V. Changes in the frequencies of chromosome inversions in experimental populations of Drosophila pseudoobscura. REMCB [Internet]. 2020Nov.30 [cited 2024Jul.3];41(2):125-31. Available from: https://remcb-puce.edu.ec/remcb/article/view/882
Issue
Vol. 41 No. 2: November 2020
Section
Artículos Científicos

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