Molecular genetic regulation of the vegetative–generative transition in wheat from an environmental perspective

Kiss, Tibor and Horváth d., Ádám and Cseh, András and Berki, Zita and Balla, Krisztina and Karsai, Ildikó (2025) Molecular genetic regulation of the vegetative–generative transition in wheat from an environmental perspective. ANNALS OF BOTANY, 135 (4). pp. 605-628. ISSN 0305-7364

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Abstract

The key to the wide geographical distribution of wheat is its high adaptability. One of the most commonly used methods for studying adaptation is investigation of the transition between the vegetative–generative phase and the subsequent intensive stem elongation process. These processes are determined largely by changes in ambient tem- perature, the diurnal and annual periodicity of daylength, and the composition of the light spectrum. Many genes are involved in the perception of external environmental signals, forming a complex network of interconnections that are then integrated by a few integrator genes. This hierarchical cascade system ensures the precise occur- rence of the developmental stages that enable maximum productivity. This review presents the interrelationship of molecular–genetic pathways (Earliness per se, circadian/photoperiod length, vernalization – cold requirement, phytohormonal – gibberellic acid, light perception, ambient temperature perception and ageing – miRNA) respon- sible for environmental adaptation in wheat. Detailed molecular genetic mapping of wheat adaptability will allow breeders to incorporate new alleles that will create varieties best adapted to local environmental conditions.

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