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Abstract:

The meiotic behaviour of 13 spontaneous interspecific F1 hybrids of Amaranthus was studied. The hybrids between species with n= 16 chromosomes had 16 bivalents but varied considerably in pollen stainability (0–55%). These results suggest the existence of cryptic structural hybridity. The hybrids involving A. cruentus (n = 17) and species with n = 16 (A. caudatus and A. quitensis) always formed 15II+1 III with very low pollen stainability (5–7%). Further observations indicated that Amaranthus species are allotetraploids with basic numbers of x= 8 and x= 9 but exhibit x= 16 and x= 17 as secondary basic numbers, as demonstrated by (a) the frequent presence of 811 + 171 in the meiosis of the hybrid A. spinosus (n = 17) × A. hybridus (n= 16); and the occurrence of secondary associations between bivalents in MI. Genomic formulae are proposed for each species, on the basis of the meiotic behaviour of the hybrids studied. Copyright © 1995, Wiley Blackwell. All rights reserved

Registro:

Documento: Artículo
Título:Meiotic studies of spontaneous hybrids of Amaranthus: genome analysis
Autor:Greizerstein, E.J.; Poggio, L.
Filiación:Institute Fitotécnico de Sta. Catalina (FCAF, UNLP)-Centro de Investigaciones Géneticas (UNLP-CONICET-CIC), Llavallol, Buenos Aires, 1836, Argentina
Departamento de Ciencias Biologicas, FCEN, UBA, Buenos Aires, Argentina
Palabras clave:Amaranthus; basic chromosome number; genome analysis; homeology; hybrids; meiotic behaviour; polyploidy; pseudocereal
Año:1995
Volumen:114
Número:5
Página de inicio:448
Página de fin:450
DOI: http://dx.doi.org/10.1111/j.1439-0523.1995.tb00830.x
Título revista:Plant Breeding
Título revista abreviado:Plant Breed.
ISSN:01799541
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01799541_v114_n5_p448_Greizerstein

Referencias:

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  • Behera, B., Patnaik, S.N., Cytotaxonomic studies in the family Amaranthaceae (1974) Cytologia, 39, pp. 121-131
  • Behera, B., Patnaik, S.N., Genome analysis of Amaranthus dubius Mart. ex. Thell. through the study of A. spinosus × A. dubius hybrids (1982) CYTOLOGIA, 47, pp. 379-389
  • Coons, M.P, Status of Amaranthus hybridus L. in South America (1977) Ciencia y Naturaleza, 18 (1), pp. 80-87
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  • Desai, S.R, Morphological and cytological studies on Amaranthaceae. (1971) CYTOLOGIA, 36, pp. 349-353
  • Grant, F.W, Cytogenetic studies in Amaranthus I. Cytogenetical aspects of sex determination in dioecious species (1959) Canadian Journal of Botany, 37, pp. 413-417
  • Grant, F.W, Cytogenetic studies in Amaranthus II. Natural interspecific hybridization between Amaranthus dubius and A. spinosus. (1959) Canadian Journal of Botany, 37, pp. 1063-1070
  • Grant, F.W, Cytogenetic studies in Amaranthus III. Chromosome numbers and phylogenetic aspects (1959) Canadian Journal of Genetics and Cytology, 1, pp. 313-318
  • Greizerstein, E.J., Poggio, L., Estudios citogeneticos de seis hibridos interespecificos de Amaranthus (Amaranthaceae) (1992) Darwiniana, 31, pp. 159-165
  • Greizerstein, E.J., Poggio, L., Karyological studies in grain Amaranthus (1994) Cytologia, 59, pp. 25-30
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Citas:

---------- APA ----------
Greizerstein, E.J. & Poggio, L. (1995) . Meiotic studies of spontaneous hybrids of Amaranthus: genome analysis. Plant Breeding, 114(5), 448-450.
http://dx.doi.org/10.1111/j.1439-0523.1995.tb00830.x
---------- CHICAGO ----------
Greizerstein, E.J., Poggio, L. "Meiotic studies of spontaneous hybrids of Amaranthus: genome analysis" . Plant Breeding 114, no. 5 (1995) : 448-450.
http://dx.doi.org/10.1111/j.1439-0523.1995.tb00830.x
---------- MLA ----------
Greizerstein, E.J., Poggio, L. "Meiotic studies of spontaneous hybrids of Amaranthus: genome analysis" . Plant Breeding, vol. 114, no. 5, 1995, pp. 448-450.
http://dx.doi.org/10.1111/j.1439-0523.1995.tb00830.x
---------- VANCOUVER ----------
Greizerstein, E.J., Poggio, L. Meiotic studies of spontaneous hybrids of Amaranthus: genome analysis. Plant Breed. 1995;114(5):448-450.
http://dx.doi.org/10.1111/j.1439-0523.1995.tb00830.x