The Palomero genome suggests metal effects on domestication.
Maize domestication (Zea mays ssp. mays L.) resulted in a wide diversity of native landraces that represent an invaluable source of genetic information for exploring natural variation and genome evolution. We sequenced de novo the approximately 2-gigabase genome of the Mexican landrace Palomero Toluqueño (Palomero) and compared its features to those of the modern inbred line B73. We revealed differences concordant with its ancient origin and identified chromosomal regions of low nucleotide variability that contain domestication genes involved in heavy-metal detoxification. Our results indicate that environmental changes were important selective forces acting on maize domestication.
Vielle-Calzada
Jean-Philippe
JP
Laboratorio Nacional de Genómica para la Biodiversidad, CINVESTAV Irapuato, Km 9.6 Libramiento Norte Carretera Irapuato-León, 36500 Irapuato, Mexico.
Martínez de la Vega
Octavio
O
Hernández-Guzmán
Gustavo
G
Ibarra-Laclette
Enrique
E
Alvarez-Mejía
Cesar
C
Vega-Arreguín
Julio C
JC
Jiménez-Moraila
Beatriz
B
Fernández-Cortés
Araceli
A
Corona-Armenta
Guillermo
G
Herrera-Estrella
Luis
L
Herrera-Estrella
Alfredo
A
D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics; D018556:Crops, Agricultural / Q000235:genetics / Q000254:growth & development; D017343:Genes, Plant; D014644:Genetic Variation; D018745:Genome, Plant; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism* / Q000633:toxicity; D008969:Molecular Sequence Data; D012641:Selection, Genetic; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D012987:Soil / Q000032:analysis; D003313:Zea mays / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*
D019216:Metals, Heavy; D012987:Soil