Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny

Maize (2n = 40) x Tripsacum dactyloides (2n = 72) F1 hybrid plants (2n = 56) were obtained by embryo rescue and induction of somatic embryogenesis/organogenesis. Hybrid plants showed Tripsacum-like phenotypes, tolerance to stresses such as NaCl salinity and low temperatures. The more frequent meioti...

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Autores principales: Molina, María del Carmen, García, María Dina, Chorzempa, Silvia Elena
Formato: Articulo
Lenguaje:Inglés
Publicado: 2006
Materias:
Ciencias Agrarias
Chromosome number
Corn
Eastern gamagrass
Remote hybridisation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/108605
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-108605
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Chromosome number
Corn
Eastern gamagrass
Remote hybridisation
spellingShingle Ciencias Agrarias
Chromosome number
Corn
Eastern gamagrass
Remote hybridisation
Molina, María del Carmen
García, María Dina
Chorzempa, Silvia Elena
Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
topic_facet Ciencias Agrarias
Chromosome number
Corn
Eastern gamagrass
Remote hybridisation
description Maize (2n = 40) x Tripsacum dactyloides (2n = 72) F1 hybrid plants (2n = 56) were obtained by embryo rescue and induction of somatic embryogenesis/organogenesis. Hybrid plants showed Tripsacum-like phenotypes, tolerance to stresses such as NaCl salinity and low temperatures. The more frequent meiotic configurations were 28II (24%), 24II + 2IV (19%) and 26II + 1IV (12%), with an average per cell of 0.55I + 25.18II + 1.19IV. Significant differences between plants were not observed. Pollen fertility ranged from 0% to 50%. After pollination with maize or Tripsacum, 20% of F1 plants have developed viable seeds, which originated the progeny. Thirty five percent of the progeny showed 2n = 56 chromosomes and F1 like-phenotypes, which suggests they have apomictic origin. The remaining plants were fertile and they showed maize-like phenotypes and different chromosome numbers (2n = 22, 24, 26, 28 and 30), because they kept the complete maize chromosome complement and some of the Tripsacum chromosomes. Meiotic cells showed pairing between chromosomes from both parental species, which suggests the possibility of genetic recombination between them.
format Articulo
Articulo
author Molina, María del Carmen
García, María Dina
Chorzempa, Silvia Elena
author_facet Molina, María del Carmen
García, María Dina
Chorzempa, Silvia Elena
author_sort Molina, María del Carmen
title Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
title_short Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
title_full Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
title_fullStr Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
title_full_unstemmed Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
title_sort meiotic study of zea mays ssp. mays (2n = 40) x tripsacum dactyloides (2 n = 72) hybrid and its progeny
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/108605
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