Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids

The aim of this work was to analyse: a) the phenotypic and cytogenetic differences of Zea mays and Zea perennis hybrids 2n=30 and 40; b) the effect of colchicine on their chromosomes pairing in meiosis. The plant materials used for these studies were Z. mays (Zm20) 2n=20, Z. mays (Zm40) 2n=40 and Z....

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Autores principales: Molina, María del Carmen, García, María Dina
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Agrarias
Zea mays
Maize hybrids
Genomic formulae
Ploidy
Embryo rescue
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/133938
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-133938
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
Zea mays
Maize hybrids
Genomic formulae
Ploidy
Embryo rescue
spellingShingle Ciencias Agrarias
Zea mays
Maize hybrids
Genomic formulae
Ploidy
Embryo rescue
Molina, María del Carmen
García, María Dina
Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids
topic_facet Ciencias Agrarias
Zea mays
Maize hybrids
Genomic formulae
Ploidy
Embryo rescue
description The aim of this work was to analyse: a) the phenotypic and cytogenetic differences of Zea mays and Zea perennis hybrids 2n=30 and 40; b) the effect of colchicine on their chromosomes pairing in meiosis. The plant materials used for these studies were Z. mays (Zm20) 2n=20, Z. mays (Zm40) 2n=40 and Z. perennis (Zp) 2n=40 and the hybrids Zm20 ×Zp (MP30) 2n=30 and Zm40 × Zp (MP40) 2n=40. Some characteristics of Z. perennis such as rhizomes, distic ears, perennially and profuse tillering were only observed in MP40 plants. In the other hand, MP30 plants had maize like phenotype; they were annual, with 4 round ears and low tillering. Therefore, phenotypic expression of several traits depends upon the dose of genes from each parent in the hybrid. The genomic formulae proposed for these species and hybrids were Zm20: AmAm BmBm; Zm40: AmAmAmAm BmBmBmBm; Zp: ApApApAp Bp1Bp1 Bp2Bp2; MP30: AmApAp Bp1Bp2 Bm; MP40: AmAmApAp BmBm Bp1Bp2. Prezigotene colchicine treatment increased the frequency of quadrivalents in Zm20, Zp and Mp40 and trivalents in MP30. These results suggest homoeology between Bm and Bp1Bp2 genomes from maize and Zp, respectively.
format Articulo
Articulo
author Molina, María del Carmen
García, María Dina
author_facet Molina, María del Carmen
García, María Dina
author_sort Molina, María del Carmen
title Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids
title_short Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids
title_full Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids
title_fullStr Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids
title_full_unstemmed Influence of Ploidy Levels on Phenotypic and Cytogenetic Traits in Maize and Zea perennis Hybrids
title_sort influence of ploidy levels on phenotypic and cytogenetic traits in maize and zea perennis hybrids
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/133938
work_keys_str_mv AT molinamariadelcarmen influenceofploidylevelsonphenotypicandcytogenetictraitsinmaizeandzeaperennishybrids
AT garciamariadina influenceofploidylevelsonphenotypicandcytogenetictraitsinmaizeandzeaperennishybrids
bdutipo_str Repositorios
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