Maize adaptation across temperate climates was obtained via expression of two florigen genes

Autoři: Sara Castelletti aff001;  Aude Coupel-Ledru aff002;  Italo Granato aff002;  Carine Palaffre aff003;  Llorenç Cabrera-Bosquet aff002;  Chiara Tonelli aff001;  Stéphane D. Nicolas aff004;  François Tardieu aff002;  Claude Welcker aff002;  Lucio Conti aff001
Působiště autorů: Department of Biosciences, University of Milan, Milan, Italy aff001;  LEPSE, INRAe, Univ. Montpellier, SupAgro, Montpellier, France aff002;  Unité Expérimentale du Maïs, INRAe, Univ. Bordeaux, Saint Martin de Hinx, France aff003;  GQE—Le Moulon, INRAe, Université Paris-Saclay, CNRS, AgroParisTech, Gif-sur-Yvette, France aff004
Vyšlo v časopise: Maize adaptation across temperate climates was obtained via expression of two florigen genes. PLoS Genet 16(7): e32767. doi:10.1371/journal.pgen.1008882
Kategorie: Research Article
doi: 10.1371/journal.pgen.1008882


Expansion of the maize growing area was central for food security in temperate regions. In addition to the suppression of the short-day requirement for floral induction, it required breeding for a large range of flowering time that compensates the effect of South-North gradients of temperatures. Here we show the role of a novel florigen gene, ZCN12, in the latter adaptation in cooperation with ZCN8. Strong eQTLs of ZCN8 and ZCN12, measured in 327 maize lines, accounted for most of the genetic variance of flowering time in platform and field experiments. ZCN12 had a strong effect on flowering time of transgenic Arabidopsis thaliana plants; a path analysis showed that it directly affected maize flowering time together with ZCN8. The allelic composition at ZCN QTLs showed clear signs of selection by breeders. This suggests that florigens played a central role in ensuring a large range of flowering time, necessary for adaptation to temperate areas.

Klíčová slova:

Gene mapping – Genome-wide association studies – Heredity – Leaves – Maize – Plant genetics – Plant genomics – Quantitative trait loci – Single nucleotide polymorphisms


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