Abstract
The pleiotropic effects of three genetically related dwarfing genes were investigated in near-isogenic lines of wheat. The NORIN 10 semi-dwarfing alleles, Rht 1 and Rht 2, and the Tom Thumb allele, Rht 3, were assessed for effects on some vegetative morphological and physiological characters. The Rht alleles affected leaf size with a resultant decrease in leaf area of the whole plant. Rht 3, which had the most marked effects, reduced leaf area in young plants by as much as 30 per cent. Although flag leaf dimensions and stomatal distributions of the flag leaf were altered, the gene had no effect on its area, stomatal conductance or net CO2 exchange rate. Comparisons of Rht and tall plants revealed no differences in the abscisic acid (ABA) levels of either turgid or partially dehydrated leaves.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
