Abstract: Nei 2499, a new monogerm cytoplasmic male sterile diploid sugarbeet variety, from a cytoplasmic male sterile monogerm diploid line N9849-CMS as the female parent with a polygerm diploid line RZ-1 as the male parent was crossed through natural pollination hy 5：1.In the test of sugarbeet disease-resistance variety in Inner Mongolia, the average root yield, sugar content were 5097.5 kg/acre, lS.8%,The demonstration experiment in the Inner Mongolia, the average root yield were 4420 kg/acre, increased by 18.36%,sugar content was 17.67%and increased 0.33%,Therefore, this variety reached Monogerm type and high yield level.