板蓝根新品种定蓝2号选育报告

为了丰富板蓝根种质，促进板蓝根产业提质增效。采用单株选择法选育出了板蓝根新品种定蓝2号。2017 — 2019年在不同生态区进行的区域试验中, 定蓝2号鲜板蓝根折合平均产量12 787.5 kg/hm2，较对照品种定蓝1号增产5.8%。在2018 — 2019年进行的大田生产示范中，鲜板蓝根折合平均产量12 232.5 kg/hm2，较对照品种定蓝1号增产6.9%。定蓝2号特级品出成率平均22.9%，较对照品种定蓝1号提高4.0个百分点；一级品出成率平均为23.5%，较对照品种定蓝1号提高7.5个百分点。测定结果表明，定蓝2号内在质量优于2020版《中国药典》标准。定蓝2号霜霉病平均发病率为15.7%，较对照品种定蓝1号降低55.0%；病情指数为16.8，较对照品种定蓝1号降低34.1%。适宜在海拔1 800～2 300 m、年降水量400～550 mm有灌溉条件或者降水充足的地区种植。

Breeding Report of New Radix isatidis Variety Dinglan 2

To enrich varieties of Radix isatidis and to promote the improvement of quality and efficiency in the Radix isatidis industry development, by using the method of single plant selection, a new Radix isatidis variety Dinglan 2 was bred. From 2017 to 2019, yield data in the regional experiment conducted in different ecological areas showed an average yield of 12 787.5 kg/ha, which showed an increase of 5.8% over the control variety Dinglan 1. From 2018 to 2019, the average fresh yield in the demonstration of field production was 12 232.5 kg/ha, which was 6.9% higher than that of the control variety Dinglan 1. The average rate of premium grade product in Dinglan 2 was 22.9% which was 4.0 percent higher than that of the control variety Dinglan 1, the average rate of the first-grade product in Dinglan 2 was 23.5% which was 7.5 percent higher than that of the control variety Dinglan 1. The results of internal mass determination of Dinglan 2 showed that it was better than the standard of Chinese Pharmacopoeia in 2020. The average incidence rate of downy mildew in Dinglan 2 was 15.7% which was 55.0% lower than that in the control variety Dinglan 1. The disease index was 16.8 which was 34.1% lower than that of the control variety Dinglan 1. It is suitable for application and popularization in ecological areas with irrigation conditions or sufficient precipitation at the altitude of 1 800 to 2 300 m asl and annual precipitation of 400 to 550 mm.