Comparing the effects of GA-responsive dwarfing genes
Rht13, and Rht8, on plant height and some agronomic traits in common wheat.
12) It is noteworthy that only GA-related dwarfing genes
contributed to the Green Revolution both for rice and wheat, despite the fact that there are a lot of genes involved in stem elongation and that their mutation also cause dwarfism.
Optimising wheat grain yield: Effects of Rht (gibberellin-insensitive) dwarfing genes
Scorza and colleagues are already working with other dwarfing genes
for transfer into pear.
Richards (1992a) concluded that grain yield does not depend on the presence of dwarfing genes
per se, but rather on an optimum height for a given environment.
This restriction provides an incentive to winter wheat breeding programs to use alternative dwarfing genes
in the low-precipitation dryland regions of the Great Plains and Pacific Northwest, where deep seed placement is needed to reach moist soil to initiate germination (Budak et al.
Plant restructuring in wheat and rice by means of dwarfing genes
laid the foundation for the Green Revolution that has benefited millions of people worldwide.
The contribution of the dwarfing genes
was noted with lines of the second period including the four semidwarf cultivars (Alliage, Pernel, Renan, Soissons) and four cultivars of conventional stature (Arche, Arminda, Fidel, and Thesee).
Other dwarfing genes
in Sorghum are pleiotropic and have such detrimental effects as to be useless in plant breeding (see review in Morgan and Finlayson, 2000).
The relationships between the dwarfing genes
of wheat and rye.
Major dwarfing genes
have been used extensively in developing semidwarf wheat (Triticum aestivum L.
Our studies (Rebetzke and Richards, 2000) show that semidwarf lines with GA-sensitive dwarfing genes
have the same desirable partitioning characteristics of the current semidwarf wheats but may also produce greater biomass if soil conditions at sowing are unfavorable (Rebetzke and Richards, 1999).