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

Autor: Castelletti S; Department of Biosciences, University of Milan, Milan, Italy., Coupel-Ledru A; LEPSE, INRAe, Univ. Montpellier, SupAgro, Montpellier, France., Granato I; LEPSE, INRAe, Univ. Montpellier, SupAgro, Montpellier, France., Palaffre C; Unité Expérimentale du Maïs, INRAe, Univ. Bordeaux, Saint Martin de Hinx, France., Cabrera-Bosquet L; LEPSE, INRAe, Univ. Montpellier, SupAgro, Montpellier, France., Tonelli C; Department of Biosciences, University of Milan, Milan, Italy., Nicolas SD; GQE-Le Moulon, INRAe, Université Paris-Saclay, CNRS, AgroParisTech, Gif-sur-Yvette, France., Tardieu F; LEPSE, INRAe, Univ. Montpellier, SupAgro, Montpellier, France., Welcker C; LEPSE, INRAe, Univ. Montpellier, SupAgro, Montpellier, France., Conti L; Department of Biosciences, University of Milan, Milan, Italy.
Jazyk: angličtina
Zdroj: PLoS genetics [PLoS Genet] 2020 Jul 16; Vol. 16 (7), pp. e1008882. Date of Electronic Publication: 2020 Jul 16 (Print Publication: 2020).
DOI: 10.1371/journal.pgen.1008882
Abstrakt: 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.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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