Meiotic behavior and DNA content in alloplasmic lines of maize
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 ob...
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1997
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08312796_v40_n5_p723_Poggio http://hdl.handle.net/20.500.12110/paper_08312796_v40_n5_p723_Poggio |
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paper:paper_08312796_v40_n5_p723_Poggio2023-06-08T15:46:14Z Meiotic behavior and DNA content in alloplasmic lines of maize Poggio, Lidia Rosato, Carmen Luisa Marcela Naranjo, Carlos Alberto 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 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. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rosato, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Naranjo, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08312796_v40_n5_p723_Poggio http://hdl.handle.net/20.500.12110/paper_08312796_v40_n5_p723_Poggio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Poggio, Lidia Rosato, Carmen Luisa Marcela Naranjo, Carlos Alberto Meiotic behavior and DNA content in alloplasmic lines of maize |
| topic_facet |
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 |
| description |
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. |
| author |
Poggio, Lidia Rosato, Carmen Luisa Marcela Naranjo, Carlos Alberto |
| author_facet |
Poggio, Lidia Rosato, Carmen Luisa Marcela Naranjo, Carlos Alberto |
| author_sort |
Poggio, Lidia |
| title |
Meiotic behavior and DNA content in alloplasmic lines of maize |
| title_short |
Meiotic behavior and DNA content in alloplasmic lines of maize |
| title_full |
Meiotic behavior and DNA content in alloplasmic lines of maize |
| title_fullStr |
Meiotic behavior and DNA content in alloplasmic lines of maize |
| title_full_unstemmed |
Meiotic behavior and DNA content in alloplasmic lines of maize |
| title_sort |
meiotic behavior and dna content in alloplasmic lines of maize |
| publishDate |
1997 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08312796_v40_n5_p723_Poggio http://hdl.handle.net/20.500.12110/paper_08312796_v40_n5_p723_Poggio |
| work_keys_str_mv |
AT poggiolidia meioticbehavioranddnacontentinalloplasmiclinesofmaize AT rosatocarmenluisamarcela meioticbehavioranddnacontentinalloplasmiclinesofmaize AT naranjocarlosalberto meioticbehavioranddnacontentinalloplasmiclinesofmaize |
| _version_ |
1768546402352234496 |