Submitted to: Germplasm Release
Publication Type: Germplasm Release
Publication Acceptance Date: 12/12/2006
Publication Date: 2/20/2007
Citation: Pedersen, J.F., Funnell, D., Toy, J.J., Oliver, A.L., Grant, R.J. 2007. Release of three sorghum genetic stocks with stacked brown midrib genes bmr-6 and bmr-12. Germplasm Release. Interpretive Summary:
Technical Abstract: Three sorghum [Sorghum bicolor (L.) Moench] genetic stocks, BN611, A/BN612, and RN613, with stacked brown midrib genes bmr-6 and bmr-12 were developed jointly by the USDA-ARS and the Agricultural Research Division, Institute of Agriculture and Natural Resources, University of Nebraska. The genetic stocks are F3 or F4 selections from crosses between sister-lines of N598 (Atlas bmr-6) and ‘Atlas bmr-12’, N599 (Wheatland bmr-6) and N600 (Wheatland bmr-12), and N609 (RTx430 bmr-6) and N610 (RTx430 bmr-12), respectively. BN611 resembles Atlas. Averaged over 4 environments, BN611 was 2 d later in maturity (81 d vs. 79 d, LSD=2 d) and 60 cm shorter in height (211 cm vs. 271 cm, LSD=10 cm) than Atlas. BN612 resembles Wheatland. Averaged over 4 environments, BN612 was 4 d later in maturity (77 d vs. 73 d, LSD=3 d) and 7 cm shorter in height (98 cm vs. 105 cm, LSD=3 cm) than Wheatland. RN613 resembles RTx430. Averaged over 4 environments, RN613 was 7 d later in maturity (85 d vs. 78 d, LSD=3 d) and 5 cm taller in height (129 cm vs. 124 cm, LSD=3 cm) than RTx430. These genetic stocks makes stacked brown midrib genes reported to reduce the activity of two specific enzymes important in lignin synthesis, cinnamyl alcohol dehydrogenase (bmr-6) and O-methyltransferase (bmr-12) available in a common forage sorghum, a common grain sorghum seed parent, and a common grain sorghum pollen parent background. The genetic stocks have immediate application for basic research involving lignin synthesis.