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 F1 hybrids between the lines. T...

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Detalles Bibliográficos
Autores principales: Chiavarino, Amílcar Mauricio, Poggio, Lidia, Rosato, Carmen Luisa Marcela
Publicado: 2001
Materias:
B-chromosomes
Maize
Preferential fertilization
Zea mays
Argentina
autosome
cross breeding
fertilization
genetic regulation
genetic selection
genetic variability
haploidy
hybrid
Italy
maize
meiosis
urban area
Chromosomes
Crosses, Genetic
Environment
Fertilization
Genes, Plant
Genotype
Meiosis
Nondisjunction, Genetic
Selection (Genetics)
Spain
Variation (Genetics)
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v86_n6_p743_Chiavarino
http://hdl.handle.net/20.500.12110/paper_0018067X_v86_n6_p743_Chiavarino
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0018067X_v86_n6_p743_Chiavarino
record_format dspace
spelling paper:paper_0018067X_v86_n6_p743_Chiavarino2023-06-08T14:39:26Z Is maize B chromosome preferential fertilization controlled by a single gene? Chiavarino, Amílcar Mauricio Poggio, Lidia Rosato, Carmen Luisa Marcela B-chromosomes Maize Preferential fertilization Zea mays Argentina autosome cross breeding fertilization genetic regulation genetic selection genetic variability haploidy hybrid Italy maize meiosis urban area maize Argentina Chromosomes Crosses, Genetic Environment Fertilization Genes, Plant Genotype Meiosis Nondisjunction, Genetic Selection (Genetics) Spain Variation (Genetics) Zea mays 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 F1 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 F1 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. Fil:Chiavarino, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Poggio, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rosato, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v86_n6_p743_Chiavarino http://hdl.handle.net/20.500.12110/paper_0018067X_v86_n6_p743_Chiavarino
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic B-chromosomes
Maize
Preferential fertilization
Zea mays
Argentina
autosome
cross breeding
fertilization
genetic regulation
genetic selection
genetic variability
haploidy
hybrid
Italy
maize
meiosis
urban area
maize
Argentina
Chromosomes
Crosses, Genetic
Environment
Fertilization
Genes, Plant
Genotype
Meiosis
Nondisjunction, Genetic
Selection (Genetics)
Spain
Variation (Genetics)
Zea mays
spellingShingle B-chromosomes
Maize
Preferential fertilization
Zea mays
Argentina
autosome
cross breeding
fertilization
genetic regulation
genetic selection
genetic variability
haploidy
hybrid
Italy
maize
meiosis
urban area
maize
Argentina
Chromosomes
Crosses, Genetic
Environment
Fertilization
Genes, Plant
Genotype
Meiosis
Nondisjunction, Genetic
Selection (Genetics)
Spain
Variation (Genetics)
Zea mays
Chiavarino, Amílcar Mauricio
Poggio, Lidia
Rosato, Carmen Luisa Marcela
Is maize B chromosome preferential fertilization controlled by a single gene?
topic_facet B-chromosomes
Maize
Preferential fertilization
Zea mays
Argentina
autosome
cross breeding
fertilization
genetic regulation
genetic selection
genetic variability
haploidy
hybrid
Italy
maize
meiosis
urban area
maize
Argentina
Chromosomes
Crosses, Genetic
Environment
Fertilization
Genes, Plant
Genotype
Meiosis
Nondisjunction, Genetic
Selection (Genetics)
Spain
Variation (Genetics)
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 F1 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 F1 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.
author Chiavarino, Amílcar Mauricio
Poggio, Lidia
Rosato, Carmen Luisa Marcela
author_facet Chiavarino, Amílcar Mauricio
Poggio, Lidia
Rosato, Carmen Luisa Marcela
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0018067X_v86_n6_p743_Chiavarino
http://hdl.handle.net/20.500.12110/paper_0018067X_v86_n6_p743_Chiavarino
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AT poggiolidia ismaizebchromosomepreferentialfertilizationcontrolledbyasinglegene
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