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Related Experiment Video

Updated: May 22, 2025

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

Maize B chromosome affects the flowering time.

Paulo Maurício Ruas^1,2, Mateus Mondin¹, Antonio Augusto Franco Garcia¹

¹Department of Genetics, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, SP, Brazil.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik

|March 14, 2025

Summary

This summary is machine-generated.

Maize B chromosomes tend to delay male flowering time. This study found B chromosomes significantly impact male flowering in Zea mays L., with minimal effect on female flowering.

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Agrobacterium-Mediated Immature Embryo Transformation of Recalcitrant Maize Inbred Lines Using Morphogenic Genes

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Published on: February 14, 2020

Area of Science:

Plant genetics
Maize breeding
Flowering time regulation

Background:

B chromosomes are extranumerary genetic elements found in some plant species, including maize (Zea mays L.).
The impact of B chromosomes on plant development and reproductive traits is not fully understood.
Flowering time is a critical agricultural trait influenced by genetic and environmental factors.

Purpose of the Study:

To investigate the influence of maize B chromosomes on both female and male flowering time in Zea mays L.
To determine if the number of B chromosomes correlates with alterations in flowering phenology.
To assess the effect of B chromosomes across different maize genetic backgrounds, including inbred lines and hybrids.

Main Methods:

Conducted four experiments using inbred lines of the Zapalote Chico race and a Cateto x Zapalote Chico hybrid.
Designed experiments in complete randomized blocks with two replications.
Classified plants based on the number of B chromosomes to analyze variations in flowering time.

Main Results:

B chromosomes showed minimal influence on female flowering time in the Zapalote Chico inbred lines.
Statistical analysis indicated that B chromosome number significantly contributed to variations in male flowering time.
Results were consistent across inbred lines and the Cateto x Zapalote Chico hybrid, confirming a more pronounced effect on male flowering.

Conclusions:

Maize B chromosomes tend to delay male flowering time, with the effect being more pronounced as the number of B chromosomes increases.
The precise mechanisms by which B chromosomes influence flowering time in Zea mays L. remain to be elucidated.
Further research is needed to explore the roles of euchromatic and heterochromatic regions of B chromosomes in regulating flowering time.