苦荞品系定苦荞2号是从镇巴苦荞中系统选育而成。在2016 — 2018年多点区域试验中，定苦荞2号3 a 15点(次)折合平均产量2 693.40 kg/hm2，比对照品种川荞1号增产10.57%。该品系中早熟，生育期97 d。株高121.7 cm，主茎分枝6.1个，主茎节数16.3节，株型紧凑。籽粒长锥形、灰黑色，单株粒重3.0 g，千粒重18.0 g。籽粒含粗淀粉576.0 g/kg、粗脂肪24.8 g/kg、蛋白质117.0 g/kg、水分9.18 g/100 g、总黄酮2.94 g/100 g。抗旱、抗褐斑病及轮纹病、丰产稳产性好。适宜在干旱、半干旱海拔1 800～2 400 m及同类地区种植。

A new tartary buckwheat line Dingkuqiao 2 was systematically bred from Zhenbakuqiao. In 2016 — 2018， the average yield of 3 a 15 sites(times) of Dingkuqiao 2 was 2 693.40 kg/hm2 and 10.57% higher than that of the control Chuanqiao 1 in Regional Experiment. The line is medium and early maturing， the growth period was 97 days， and the plant height was about 121.7 cm， the branch of stem was 6.1， node number of stem was 16.3， 1 000-grains weight was 3.0 g and seeds weight per-plant was 18.0 g. The plant type is compact， the grain is long conical， grayish black. The grain content of crude starch， crude fat， protein， water content and flavonoids compounds were 57.60%， 2.48%， 11.7%， 9.18 g/100 g and 2.94 g/100 g， respectively. It has good drought resistance， resistance to brown spot disease and rotation disease， high yield and stable yield. It is suitable to be grown in below 1 800～2 400 m in Arid and Semi-arid Area and similar areas.

S512.9

甘肃省科技重大专项“特色作物新品种选育与示范”(18ZD2NA008-2)。