Abstract
Inversion frequencies in chromosomes 16 and 18 and B-chromosome frequency have been studied in three populations of Rattus rattus frugivorus.
In two of these, Cuenca and San Pedro del Pinatar, the frequencies of homozygous and heterozygous individuals do not differ significantly from the Hardy-Weinberg equilibrium for both chromosome pairs. By contrast, in the Vega de Granada population there are fewer heterozygous and more homozygous individuals than expected on the basis of the Hardy-Weinberg distribution, although the frequency distributions of karyotypes in these three populations are not significantly different.
In relation to the B chromosome, the Cuenca and San Pedro populations have frequencies of B-carrying animals of 0.25 and 0.22 respectively, the Vega de Granada population of 0.80.
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Baverstock, P. R., Watts, C. H. S., Hogarth, J. T., Robinson, A. C. & Robinson, J. F., 1977. Chromosome evolution in Australian rodents II. The Rattus group. Chromosoma 61: 227–241.
Diaz de la Guardia, G. R., Ladron de Guevara, R. G. & Pretel, M. A., 1979. Chromosomal polymorphism, caused by pericentric inversions in Rattus rattus ssp. frugivorus (Raf.) from the South-east of the Iberian Peninsula. Genetica 51: 103–106.
Gropp, A., Olbrich, M., Santadusit, A., Manyanodha, K., Flatz, G. & Marshall, J., 1970. Chromosomes of the house rat, Rattus rattus: Finding in a Asiatic population. Mammalian Chrom. Newsl. 11: 111.
Hewitt, G. H. & John, B., 1968. Parallel polymorphism for supernumerary segments in Chorthippus parallelus (Zetterstedt) I. British populations. Chromosoma 25: 319–342.
Hsu, T. C. & Patton, J. L., 1969. Bone marrow preparations for chromosome studies, pp. 454–460. In: Comparative mammalian cytogenetics, Ed. K., Benirschke. Springer, Berlin-Heidelberg-New York.
Pretel, M. A. & Diaz de la Guardia, R., 1978. Chromosomal polymorphism caused by supernumerary chromosomes in Rattus rattus ssp. frugivorus (Rafinesque, 1814) (Rodentia, Muridae). Experientia, 34: 325–327.
Raman, R. & Sharma, T., 1974. DNA replication, G- and C bands and meiotic behaviour of supernumerary chromosomes of Rattus rattus (Linn.). Chromosoma 45: 111–119.
Romero, C. & Lacadena, J. R., 1980. Interaction between rye B-chromosomes and wheat genetics systems controlling homoeologous pairing. Chromosoma 80: 33–48.
Yong Hoi Sen, 1972. Population cytogenetics of the Malayan house rat, Rattus rattus diardii. pp. 223–227 In: Chromosomes Today 3, Eds. C. D. Darlington & R. Lewis. London.
Yosida, T. H., Moriguchi, Y., Yang, Y. S. & Shimakura, K., 1967. Population survey of No. 1 chromosome polymorphism of Black rats (Rattus rattus) collected in Japan and Korea. Rep. National Institute of Genetics, Japan. No. 17.
Yosida, T. H., Nakamura, A. & Fukaya, T., 1965. Chromosomal polymorphism in Rattus rattus (L.) collected in Kusudomari and Misima. Chromosoma 16: 70–80.
Yosida, T. H., Tsuchiya, K. & Moriwaki, K., 1971. Frequency of chromosome polymorphism in Rattus rattus collected in Japan. Chromosoma 33: 30–40.
Wallace, G., 1968. Topics in population genetics. Norton and Co., New York.
White, M. J. D., 1969. Chromosomal rearrangements and speciation in animals. A. Rev. Genet. 3: 75–78.
White, M. J. D., 1973. Animal cytology and evolution 3rd ed. Cambridge University Press.
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Ladron de Guevara, R.G., de la Guardia, R.D. Frequency of chromosome polymorphism for pericentric inversions and B-chromosomes in Spanish populations of Rattus rattus frugivorus. Genetica 57, 99–103 (1981). https://doi.org/10.1007/BF00131234
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DOI: https://doi.org/10.1007/BF00131234