Karyological Studies in Grain Amaranths

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The karyotypes and total DNA content of four species of grain amaranths (A. caudatus 2n = 32, A. cruentus 2n = 34, A. hypochondriacus 2n = 32 and A. mantegazzianus 2n = 32) were studied. The results indicate that these kind of studies allow the differenciation of grain species of Amaranthus. There a...

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Autor principal: Greizerstein, E.J
Otros Autores: Poggio, L.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 1994
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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100 1 |a Greizerstein, E.J. 
245 1 0 |a Karyological Studies in Grain Amaranths 
260 |c 1994 
506 |2 openaire  |e Política editorial 
504 |a Bennett, M.D., Variation in genomic form in plants and its ecological implications (1987) New Phytol., 106, pp. 177-200 
504 |a Smith, J.B., Nuclear DNA content in angiosperms (1976) Proc. R. Soc. London Ser., B 274, pp. 227-274 
504 |a Flavell, R.B., Repetitive DNA and chromosome evolution in plants (1986) Philos. Trans. R. Soc., 312, pp. 327-342. , London Ser. B 
504 |a Grant, F.W., Cytogenetic studies in Amaranthus III (1959) Chromosome numbers and phylogenetic aspects. Can. J. Genet. Cytol., 1, pp. 313-318 
504 |a Greizerstein, E.J., Poggio, L., Estudios citogeneticos en seis hibridos del genero Amaranthus (1992), 31, pp. 159-165. , (Amaranthaceae). Darwiniana; Gupta, V.K., Gudu, S., Interspecific hybrids and possible phylogenetic relations in grain amaranths (1991) Euphytica, 52, pp. 33-38 
504 |a Howell, N.M., Black, D.A., Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method (1980) Experientia, 36, pp. 1014-1015 
504 |a Levan, A., Fredga, K., Sandberg, A.A., Nomenclature for centromeric position on chromosomes (1964) Hereditas, 52, pp. 201-220 
504 |a Pal, M., Khoshoo, T.M., Evolution and improvements of cultivated Amaranths VI (1973) Cytogenetic relationships in grain types. Theor. Appl. Genet., 43, pp. 242-251 
504 |a Evolution and improvements of cultivated Amaranths VII. Cytogenetic relationships in vegetable amaranths (1973) Theor. Appl. Genet., 43, pp. 343-350 
504 |a Pandley, R.M., Khoshoo, T.M., Evolution and improvements of cultivated Amaranths IX. Cytogenetic relationships between the two basic chromosome numbers (1982) J. Hered., 73, pp. 353-356 
504 |a Palomino, G., Rubi, R., Diferencias cromosómicas entre algunas especies y tipos del género Amaranthus distribuidos en México (1991) Primer Congr. Intern. Amaranto, 24. , Oaxtepec, Morelos, Mexico 
504 |a Price, H.J., Nuclear DNA content variation within angiosperm species (1988) Evol. Trends in Plants, 2, pp. 53-60 
504 |a DNA content variation among higher plants (1988) Ann. Mo. Bot. Gard., 75, pp. 1248-1257 
504 |a Romero Zarco, C., A new method for estimating karyotype asymmetry (1986) Taxon, 35, pp. 526-530 
504 |a Sauer, J.D., The grain amaranths and its relatives: a revised taxonomic and geographic survey (1967) Ann. Missour. Bot. Gard., 54, pp. 103-137 
504 |a Tandom, S.L., Tawakley, M., In IOPB chromosome number reports XXVI (1970), 19, pp. 264-269. , Taxon; Tito, C.M., Poggio, L., Naranjo, C.A., Cytogenetics studies in the genus Zea. 3. DNA content and heterochromatin in species and hybrids (1991) Theor. Appl. Genet., 83, pp. 58-64 
520 3 |a The karyotypes and total DNA content of four species of grain amaranths (A. caudatus 2n = 32, A. cruentus 2n = 34, A. hypochondriacus 2n = 32 and A. mantegazzianus 2n = 32) were studied. The results indicate that these kind of studies allow the differenciation of grain species of Amaranthus. There are differences in the karyotype formulae and asymmetry indexes A1 and A2. One pair of chromosomes with a satellite is present in the four species. The Ag-Nor staining reveals a maximum of two nucleoli per cell in mitotic interphase and one nucleolus in young meiocites. A. mantegazzianus (2C= 1.46±0.015 pg) and A. caudatus (2C= 1.35±0.013 pg) have significant differences in DNA content between them, and with the other two species, while A. cruentus (2C= 1.26±0.013 pg) and A. hypochondriacus (2C= 1.26±0.018 pg) do no differ significantly. The species with higher DNA content (A. mantegazzianus and A. caudatus) have C+ bands in most of the chromosomes, and the species with lower DNA content show C + blocks only in few chromosomes. The results suggest that the differences in DNA content among species could be attributed, at least in part, to differences in heterochromatin content. © 1994, Japan Mendel Society, International Society of Cytology. All rights reserved.  |l eng 
593 |a Instituto Fitotecnico de Sta. Catalina (FCAF, UNLP), Centro de Inv. Geneticas (UNLP-CONICET-CIC), Departamento de Cs. Biol ógicas (FCEN, UBA), Casilla de Correo 4, 1836 Llavallol, Buenos Aires, Argentina 
700 1 |a Poggio, L. 
773 0 |d 1994  |g v. 59  |h pp. 25-30  |k n. 1  |x 00114545  |w (AR-BaUEN)CENRE-226  |t Cytologia 
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856 4 0 |u https://doi.org/10.1508/cytologia.59.25  |y DOI 
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999 |c 73549 

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