The Palomero Genome Suggests Metal Effects on Domestication

Author:

Vielle-Calzada Jean-Philippe1,Martínez de la Vega Octavio1,Hernández-Guzmán Gustavo1,Ibarra-Laclette Enrique1,Alvarez-Mejía Cesar1,Vega-Arreguín Julio C.1,Jiménez-Moraila Beatriz1,Fernández-Cortés Araceli1,Corona-Armenta Guillermo1,Herrera-Estrella Luis1,Herrera-Estrella Alfredo1

Affiliation:

1. Laboratorio Nacional de Genómica para la Biodiversidad, CINVESTAV Irapuato, Km 9.6 Libramiento Norte Carretera Irapuato-León, 36500 Irapuato, Mexico.

Abstract

A-Maize-ing Maize is one of our oldest and most important crops, having been domesticated approximately 9000 years ago in central Mexico. Schnable et al. (p. 1112 ; see the cover) present the results of sequencing the B73 inbred maize line. The findings elucidate how maize became diploid after an ancestral doubling of its chromosomes and reveals transposable element movement and activity and recombination. Vielle-Calzada et al. (p. 1078 ) have sequenced the Palomero Toluqueño ( Palomero ) landrace, a highland popcorn from Mexico, which, when compared to the B73 line, reveals multiple loci impacted by domestication. Swanson-Wagner et al. (p. 1118 ) exploit possession of the genome to analyze expression differences occurring between lines. The identification of single nucleotide polymorphisms and copy number variations among lines was used by Gore et al. (p. 1115 ) to generate a Haplotype map of maize. While chromosomal diversity in maize is high, it is likely that recombination is the major force affecting the levels of heterozygosity in maize. The availability of the maize genome will help to guide future agricultural and biofuel applications (see the Perspective by Feuillet and Eversole ).

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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