• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/jgen/099/0060

    • Keywords

       

      reproductive isolation; hybrid sterility; hybrid inviability; hybridization; Drosophila; chromosome introgression.

    • Abstract

       

      In heterozygote state, we interogressed three chromosomal segments of Drosophila koepferae in D. buzzatii. The effect of each introgression was evaluated in the fertility of the segmental males, quantifying the amount of offspring produced. Through specific crosses method, we generated Drosophila segmental isolines carrying specific chromosomal introgression segments. The introgressions were monitored cytogenetically by the method of molecular markers of chromosomal asynapsis. The statistical analysis showed that none of the three segments evaluated, introgressed individually or in pairs, as well as cis or trans, do not produce sterility in the segmental males, as determined by the normal productions of offspring. Additional introgressions using other larger segments show that when the introgressions reach a minimum size of 31.15%, they produce sterility. It is concluded that the hybrid sterility genes present in the three segments evaluated did not act in strong epistasis, but show a pattern of gradual additive behaviour by requiring a minimum threshold size to produce sterility. Finally, we also isolated the smallest introgressing segment that has been reported for these species (2.19%), and for the first time we have managed to place it in homozygous state (data not shown), so we are now in the process of evaluating the ability to these segments in homozygous state.

    • Author Affiliations

       

      FRANCISCO GARCI´A-FRANCO1 LILIAN MILENA BARANDICA-CAÑON1 2 JANNITZA ARANDIABARRIOS3 EZEL JACOME GALINDO-PE´REZ4 GILBERTO SVEN BINNQÜIST CERVANTES4 MARTHA MARTÍNEZ GARCÍA5 BLANCA ESTELA CHA´VEZ-SANDOVAL1 6

      1. Department of Genetics and Microbiology, Universidad Autónoma de Barcelona, Bellaterra (Cerdanyola del Vallés), 08193 Barcelona, Spain
      2. Departamento de Ciencias Básicas, Universidad de Cartagena, Barrio Zaragocilla, Cra. 50 #29-11, Zaragocilla, Colombia
      3. Scientific Research Department, Universidad Tominaga Nakamoto, Carniceritos 2, Col. Lomas de Sotelo, 53390 Naucalpan, Estado de México, Mexico
      4. Departamento El Hombre y su Ambiente, Universidad Autónoma Metropolitana, Avenida Calzada del Hueso 1100, Coyoacán 04960, Ciudad de México, Mexico
      5. Facultad de Estudios Superiores Izatacala, Universidad Autónoma de México, Avenida de los Barrios Número 1, Colonia Los Reyes Ixtacala, Tlalnepantla 54090, Estado de México, Mexico
      6. Departamento de Matemáticas Aplicadas y Sistemas, Universidad Autónoma Metropolitana, Vasco de Quiroga 4871, Contadero, Ciudad de México 05370, Mexico
    • Dates

       
  • Journal of Genetics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.