Details

Autor(en) / Beteiligte

• Romero Navarro, J Alberto
• Willcox, Martha
• Burgueño, Juan
• Romay, Cinta
• Swarts, Kelly
• Trachsel, Samuel
• Preciado, Ernesto
• Terron, Arturo
• Delgado, Humberto Vallejo
• Vidal, Victor
• Ortega, Alejandro
• Banda, Armando Espinoza
• Montiel, Noel Orlando Gómez
• Ortiz-Monasterio, Ivan
• Vicente, Félix San
• Espinoza, Armando Guadarrama
• Atlin, Gary
• Wenzl, Peter
• Hearne, Sarah
• Buckler, Edward S

Titel

A study of allelic diversity underlying flowering-time adaptation in maize landraces

Ist Teil von

• Nature genetics, 2017-03, Vol.49 (3), p.476-480

Ort / Verlag

New York: Nature Publishing Group US

Erscheinungsjahr

2017

Quelle

MEDLINE

Beschreibungen/Notizen

• Edward Buckler, Sarah Hearne and colleagues integrate two approaches to characterize the genetic diversity of a large number of geographically distributed maize landraces. They examine flowering time and adaptation to altitude and find that the majority of the associated SNPs overlap both traits. Landraces (traditional varieties) of domesticated species preserve useful genetic variation, yet they remain untapped due to the genetic linkage between the few useful alleles and hundreds of undesirable alleles 1 . We integrated two approaches to characterize the diversity of 4,471 maize landraces. First, we mapped genomic regions controlling latitudinal and altitudinal adaptation and identified 1,498 genes. Second, we used F-one association mapping (FOAM) to map the genes that control flowering time, across 22 environments, and identified 1,005 genes. In total, we found that 61.4% of the single-nucleotide polymorphisms (SNPs) associated with altitude were also associated with flowering time. More than half of the SNPs associated with altitude were within large structural variants (inversions, centromeres and pericentromeric regions). The combined mapping results indicate that although floral regulatory network genes contribute substantially to field variation, over 90% of the contributing genes probably have indirect effects. Our dual strategy can be used to harness the landrace diversity of plants and animals.