Due to the challenge of screening traits related to lodging resistance under natural field conditions, selection for lodging resistant varieties in wheat breeding programs is difficult. The identification of easily measurable culm anatomical traits related to lodging resistance would simplify the selection process. The present study was conducted to determine the effect of dwarfing genes on culm anatomical traits related to lodging resistance in our of basal internode 1. Field and laboratory study was conducted in Shahjalal University of Science and Technology, Sylhet, Bangladesh with eight wheat genotypes having Rhr1, Rht2 dwarfing genes in them and a local land race named kheri (rh) having no dwarfing genes in them was used as a control. Culm anatomical measurements were made with a sophisticated trinocular microscope. Genotypes differed significantly for epidermal cell length, epidermal cell wall thickness, hypodermal sclerenchyma layer number, layer width ancl cell wall thickness, area of large parenchyma cells and number of vascular bundles. Epidermis and parenchyma cells have no effect on lodging resistance. Lodging resistance is greatly associated with hypodermal sclerenchyma ring cell wall thickness beiatse; Rht1 ana Rht2 dwarfing genes significantly increase cell wall thickness than Kheri by cellulose, hemicelluloses, lignin, suberin etc. deposition. Shortly, the general applicable association between culm anatomical traits and lodging resistance were not observed for most traits. So, anatomical traits aren't easily selectable traits for lodging resistance within a wheat breeding program.
- basal intemode,
- dwarfing gene,
- lodging resistance
Available at: http://works.bepress.com/mahbub_hasan/1/