Is maize B chromosome preferential fertilization controlled by a single gene?

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In previous work, genotypes for high and low B chromosome transmission rate were selected from a native race of maize. It was demonstrated that the B transmission is genetically controlled. The present work reports the fourth and fifth generations of selection and the F<SUB>1</SUB> hybri...

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Autores principales: Chiavarino, Amílcar Mauricio, González Sánchez, Mónica, Poggio, Lidia, Puertas, María J., Rosato, Marcela, Rosi, Pablo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Exactas
Ciencias Agrarias
B-chromosomes
Maize
Preferential fertilization
Zea mays
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84773
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84773
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Ciencias Agrarias
B-chromosomes
Maize
Preferential fertilization
Zea mays
spellingShingle Ciencias Exactas
Ciencias Agrarias
B-chromosomes
Maize
Preferential fertilization
Zea mays
Chiavarino, Amílcar Mauricio
González Sánchez, Mónica
Poggio, Lidia
Puertas, María J.
Rosato, Marcela
Rosi, Pablo
Is maize B chromosome preferential fertilization controlled by a single gene?
topic_facet Ciencias Exactas
Ciencias Agrarias
B-chromosomes
Maize
Preferential fertilization
Zea mays
description In previous work, genotypes for high and low B chromosome transmission rate were selected from a native race of maize. It was demonstrated that the B transmission is genetically controlled. The present work reports the fourth and fifth generations of selection and the F<SUB>1</SUB> hybrids between the lines. The native B is characterized by a constant behaviour, with normal meiosis and nondisjunction in 100% of postmeiotic mitosis. It is concluded that genetic variation for B transmission between the selected lines is due to the preferential fertilization process. The F<SUB>1</SUB> hybrids show intermediate B transmission rate between the lines. They are uniform, the variance of the selected character being one order of magnitude lower than that of the native population. In addition, 0B×2B and 2B×2B crosses were made to study the effect of the presence of B chromosomes in the female parent, resulting in non-significant differences. Several crosses were made both in Buenos Aires and in Madrid to compare the possible environmental effect, but significant differences were not found. Our results are consistent with the hypothesis of a single major gene controlling B transmission rate in maize, which acts in the egg cell at the haploid level during fertilization. It is also hypothesized that maize Bs use the normal maize fertilization process to promote their own transmission.
format Articulo
Articulo
author Chiavarino, Amílcar Mauricio
González Sánchez, Mónica
Poggio, Lidia
Puertas, María J.
Rosato, Marcela
Rosi, Pablo
author_facet Chiavarino, Amílcar Mauricio
González Sánchez, Mónica
Poggio, Lidia
Puertas, María J.
Rosato, Marcela
Rosi, Pablo
author_sort Chiavarino, Amílcar Mauricio
title Is maize B chromosome preferential fertilization controlled by a single gene?
title_short Is maize B chromosome preferential fertilization controlled by a single gene?
title_full Is maize B chromosome preferential fertilization controlled by a single gene?
title_fullStr Is maize B chromosome preferential fertilization controlled by a single gene?
title_full_unstemmed Is maize B chromosome preferential fertilization controlled by a single gene?
title_sort is maize b chromosome preferential fertilization controlled by a single gene?
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/84773
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