Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis

It had been obtained a tetraploid hybrid (2n=40), crossing Z. diploperennis (2n=20) with Z. perennis (2n=40) by non disjunction of the gametes of Z. diploperennis.The cytological study indicated that there were no univalents and trivalents. Most of the chromosomes paired as bivalents and tetravalent...

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Detalles Bibliográficos
Autor principal: Molina, María del Carmen
Formato: Articulo
Lenguaje:Inglés
Publicado: 1985
Materias:
Ingeniería Agronómica
Biología
Z. diploperennis
Z. perennis
cytological study
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/141720
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-141720
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería Agronómica
Biología
Z. diploperennis
Z. perennis
cytological study
spellingShingle Ingeniería Agronómica
Biología
Z. diploperennis
Z. perennis
cytological study
Molina, María del Carmen
Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis
topic_facet Ingeniería Agronómica
Biología
Z. diploperennis
Z. perennis
cytological study
description It had been obtained a tetraploid hybrid (2n=40), crossing Z. diploperennis (2n=20) with Z. perennis (2n=40) by non disjunction of the gametes of Z. diploperennis.The cytological study indicated that there were no univalents and trivalents. Most of the chromosomes paired as bivalents and tetravalents preferently openring. The average of the counts in 214 cells in diakinesis was: 0.24I, 11.29II, 0.06III and 4.20IV. The average of chiasmata was 31.42 and at pachynema some translocations and inversions were observed.In anaphase in the 78% of the cells the same number of chromosomes migrated to each pole and in the left 22% different number of chromosomes migrated towards each pole or remained as lagging chromosomes. Only exceptionally chromatid bridges were observed.The fertility of the pollen is 56% with 80% of fertile seed being the progeny fertile and vigorous.
format Articulo
Articulo
author Molina, María del Carmen
author_facet Molina, María del Carmen
author_sort Molina, María del Carmen
title Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis
title_short Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis
title_full Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis
title_fullStr Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis
title_full_unstemmed Cytogenetic study of a tetraploid hybrid Zea diploperennis x Zea perennis
title_sort cytogenetic study of a tetraploid hybrid zea diploperennis x zea perennis
publishDate 1985
url http://sedici.unlp.edu.ar/handle/10915/141720
work_keys_str_mv AT molinamariadelcarmen cytogeneticstudyofatetraploidhybridzeadiploperennisxzeaperennis
bdutipo_str Repositorios
_version_ 1764820459601264644

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