The GeneSTAR®Quality Grade is a DNA genetic marker panel test offered by Bovigen LLC, which identifies the presence of four major genes associated with Quality Grade and marbling. The third and fourth markers in this panel were released as of February 15, 2007. This Panel Test includes TG5, which was the first gene marker test available to the beef industry. Each of the four gene markers in this panel have been found to be highly associated with quality grade in multiple evaluations across multiple breeds of cattle. Moreover, this panel of markers is the only marbling or quality grade test to have passed an independent validation by the National Beef Cattle Evaluation Consortium.
By combining DNA tests with other information, such as EPDs, it is possible to make breeding decisions that are based on more precise information regarding each individual animal’s genetic genetics and to ultimately shorten the time and number of generations necessary to see practical results. As can be seen in the table below (A), dramatic differences in the percentage of animals grading choice can be seen when comparing 0-STAR animals and 4-STAR animals.
The value of Choice versus Select is well defined for individual steers and feeder heifers. However, what is often overlooked is the value difference between bulls, when their impact on a trait like Quality Grade is compared. The comparison in percent choice can be very valuable as evidenced by the Value per Bull graph (B), shown below.
