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Abstract:

The cytoplasm of Zea mays ssp. mexicana (teosinte) affects several inherited traits when combined with genotypes of maize (Zea mays ssp. mays). The meiotic behavior and the total DNA content of four lines of maize with teosinte cytoplasm were compared with those of the parental lines. The results obtained suggest that the cytoplasm of teosinte promotes an increase in total nuclear DNA content, perhaps through an increase of highly repetitive DNA in the knob zones. The analysis of meiotic behavior indicates that the cytoplasm of teosinte can alter the spatial distribution of the genomes, since two groups of five bivalents each were observed at a high frequency. During prophase I - anaphase I, each group of five bivalents behaves in a slightly asynchronous way with respect to the other group and, moreover, two nucleoli were observed in 10% of the cells. These results suggest that the cytoplasm of teosinte could induce changes affecting genomic structure and function in some maize genotypes. These changes are of potential importance for breeding programs and evolutionary studies.

Registro:

Documento: Artículo
Título:Meiotic behavior and DNA content in alloplasmic lines of maize
Autor:Poggio, L.; Rosato, M.; Naranjo, C.A.
Filiación:Inst. Fitotecnico de S. Catalina, Ctro. de Invest. Genéticas, C.C. 4, 1836 Llavallol, Buenos Aires, Argentina
Depto. de Ciencias Biológicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Alloplasmy; DNA content; Maize; Meiotic behavior; Nuclear-cytoplasmic interaction; Teosinte; Zea mays ssp. mexicana; anaphase; DNA analysis; genome; maize; meiosis; plant breeding; plant genetics; plant genome; prophase; Zea mays; Zea mays
Año:1997
Volumen:40
Número:5
Página de inicio:723
Página de fin:729
DOI: http://dx.doi.org/10.1139/g97-795
Título revista:Genome
Título revista abreviado:Genome
ISSN:08312796
CODEN:GENOE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08312796_v40_n5_p723_Poggio

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Citas:

---------- APA ----------
Poggio, L., Rosato, M. & Naranjo, C.A. (1997) . Meiotic behavior and DNA content in alloplasmic lines of maize. Genome, 40(5), 723-729.
http://dx.doi.org/10.1139/g97-795
---------- CHICAGO ----------
Poggio, L., Rosato, M., Naranjo, C.A. "Meiotic behavior and DNA content in alloplasmic lines of maize" . Genome 40, no. 5 (1997) : 723-729.
http://dx.doi.org/10.1139/g97-795
---------- MLA ----------
Poggio, L., Rosato, M., Naranjo, C.A. "Meiotic behavior and DNA content in alloplasmic lines of maize" . Genome, vol. 40, no. 5, 1997, pp. 723-729.
http://dx.doi.org/10.1139/g97-795
---------- VANCOUVER ----------
Poggio, L., Rosato, M., Naranjo, C.A. Meiotic behavior and DNA content in alloplasmic lines of maize. Genome. 1997;40(5):723-729.
http://dx.doi.org/10.1139/g97-795