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The B-chromosomes of Locusta migratoria I. Detection of negative correlation between mean chiasma frequency and the rate of accumulation of the B's; a reanalysis of the available data about the transmission of these B-chromosomes

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Abstract

B-chromosomes were studied in two Spanish populations of Locusta migratoria. Both exhibit a high frequency of B-carrying individuals (75% and 94%). In both the B-chromosomes are mitotically unstable and they accumulate in the male germ line. The mean rate of accumulation is 28.5% in Baños de la Encina and 31.9% in Carboneras. There are no significant differences in mean cell chiasma frequency and between-cell variance of chiasmata between follicles with different number of B's within individual males. Likewise, there are no significant differences in mean cell chiasma frequency and between-cell variance between males with and without supernumeraries. However, a significant negative correlation exists between mean chiasma frequency and the rate of accumulation.

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Authors and Affiliations

  1. Departmento de Genética, Facultad de Ciencias, Universidad de Granada, Granada, Spain

    J. Cabrero, E. Viseras & J. P. M. Camacho

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  1. J. Cabrero
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  2. E. Viseras
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  3. J. P. M. Camacho
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Cabrero, J., Viseras, E. & Camacho, J.P.M. The B-chromosomes of Locusta migratoria I. Detection of negative correlation between mean chiasma frequency and the rate of accumulation of the B's; a reanalysis of the available data about the transmission of these B-chromosomes. Genetica 64, 155–164 (1984). https://doi.org/10.1007/BF00115339

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  • DOI: https://doi.org/10.1007/BF00115339

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