A single chromosome addition from Thinopyrum elongatum confers a polycarpic, perennial habit to annual wheat

Journal of Experimental Botany
Doug LammerStephen Jones

Abstract

Annual wheat displays monocarpic senescence, but amphiploids between wheat and its wild perennial relatives in the genus Thinopyrum generally display a polycarpic, perennial growth habit. In order to determine the chromosomal basis of this phenomenon, life-history characteristics were examined using Chinese Spring wheat and a complete Thinopyrum elongatum (2n=2x=14) chromosome addition series in a Chinese Spring background. Both monosomic and disomic additions and substitutions of Th. elongatum chromosome 4E conferred a polycarpic life history to annual Chinese Spring wheat. Disomic addition lines were found to be perennial under field conditions. This is the first report of a single alien chromosome conferring a polycarpic growth habit to a monocarpic species. Chromosome 4E altered the timing of tiller initiation, such that two growth phases could be clearly identified, the first phase being indistinguishable from the growth of euploid Chinese Spring, followed by a second phase of tiller initiation after the sexual cycle of the first phase tillers was complete (post-sexual cycle regrowth).

Citations

Jun 26, 2013·Genome Génome / Conseil National De Recherches Canada·B R BaumD A Johnson
Feb 15, 2018·Molecular Cytogenetics·Daiyan LiHouyang Kang
Jan 26, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Jiale XuJan Dvorak
Jun 5, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Juliya AbbasiJan Dvorak
Apr 22, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Lauren BakerJulie King
Feb 25, 2014·Plant Physiology·Sergi Munné-Bosch
Sep 11, 2021·Frontiers in Plant Science·Kyle W SwentowskyR Kelly Dawe

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