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
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2006
Materias:	chromosome number corn eastern gamagrass remote hybridisation
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300020
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spelling	oai:scielo:S0717-345820060003000202007-01-17Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progenyMolina,María del CarmenGarcía,María DinaChorzempa,Silvia Elena chromosome number corn eastern gamagrass remote hybridisation 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.9 n.3 20062006-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300020en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	chromosome number corn eastern gamagrass remote hybridisation
spellingShingle	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
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.
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
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300020
work_keys_str_mv	AT molinamariadelcarmen meioticstudyofzeamayssspmays2n40xtripsacumdactyloides2n72hybridanditsprogeny AT garciamariadina meioticstudyofzeamayssspmays2n40xtripsacumdactyloides2n72hybridanditsprogeny AT chorzempasilviaelena meioticstudyofzeamayssspmays2n40xtripsacumdactyloides2n72hybridanditsprogeny
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Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny

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