Environmental effects on stunting and the expression of a tiller inhibition (tin) gene in wheat

Functional Plant Biology : FPB
Brian L DugganHiroshi Tsuyuzaki

Abstract

A recessive gene (tin) that inhibits tillering in wheat (Triticum aestivum L.), and that may be important in the redirection of assimilate from unproductive to productive tillers, has been reported. However, this gene has also been associated with a fatal condition known as 'stunting'. The severity of this phenomenon has been shown to increase when plants are grown under long photoperiods and at low temperatures. The objectives of this study were to observe how the expression of the tin gene varied in different genetic backgrounds, in addition to obtaining a better understanding of environmental factors that may affect both tillering and stunting in lines with the tin gene. Plants were grown outdoors in Canberra, Australia, at various times throughout the year, as well as under controlled conditions where photoperiod, temperature and light intensity were varied. The inhibition of tillers resulting from the presence of the tin gene was most extreme in summer, autumn and spring (up to 90% reduction in tillering). However, when sown in late autumn and winter, tillering was reduced by between 30-50% for the tin lines compared with their near-isogenic parents. Reduced tillering in the tin lines was due to an earlier cessation of til...Continue Reading

Citations

Oct 1, 2013·Functional Plant Biology : FPB·Tesfamichael H Kebrom, Richard A Richards
Sep 28, 2004·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·W Spielmeyer, R A Richards
Dec 17, 2014·Plant, Cell & Environment·Tesfamichael H Kebrom, John E Mullet
Jul 15, 2015·Journal of Experimental Botany·Zifeng Guo, Thorsten Schnurbusch

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