Functionality assessment and utilization of the BX7OE glutenin subunit in hard winter wheat
Adegbite, Itunuoluwa Bola
Citations
Abstract
Breeding for quality in wheat is as crucial as breeding for higher yield. Quality plays a significant role in wheat production because of the crop's functionality. Additives have become common in the baking industry, prompting a call for more "quality" wheat crops and ensuring that hard winter wheat can provide full functionality with or without additives. In this vein, a program was initiated with the USDA-ARS Hard Winter Wheat Genotyping Laboratory (HWWGL) in 2012 to introduce specific genes to the Oklahoma State University (OSU) wheat germplasm to improve disease resistance and functionality using a marker-assisted backcrossing method. The Bx7oe encoding allele was introgressed to build upon the existing dough strength within the germplasm, releasing three ultra-high dough strength cultivars possessing the glutenin subunit. To further see if the subunit's influence was responsible for the unusually strong quality, 50 experimental lines were selected using the marker-assisted selection method with or without the glutenin subunit. Only three lines showcased functionality comparable to two out of five checks included in the study, which displayed almost similar ultra-high dough strength and were thus advanced. The subunit's inconsistent influence supports the premise that relying solely on a single gene trait for selection may not be sufficient, as additional factors likely contribute to ultra-high dough strength.