优质紫心甘薯新品种龙紫12号的选育与栽培技术要点

Key points of breeding and cultivation technology of new high-quality purple heart sweet potato variety Longzi No.12

龙紫12号是龙岩市农业科学研究所以越南紫薯为母本放任授粉选育而成的紫心甘薯新品种。薯形纺锤形、薯皮深紫色、薯肉深紫色,单株结薯数4.60个,鲜样的薯块干物率36.26%,区域试验淀粉率25.18%,可溶性糖含量为3.42%,花青素含量为519.00 mg·kg^(-1);干样含蛋白质7.13%、蔗糖5.50%、还原糖5.70%、膳食纤维2.50%,食味好,外观光滑美观。抗蔓割病、黑斑病和根腐病。福建省区域试验每667 m^(2)鲜薯产量2 173.21 kg,薯干产量786.55 kg,淀粉产量566.48 kg,分别比对照福宁紫3号增产10.96%、36.63%和44.66%。适宜在福建、江西、贵州、四川、广西等地夏秋季种植。2022年通过国家非主要农作物品种登记。

Longzi No.12 is a new purple sweet potato variety with Vietnam purple sweetpotato as free pollination female parent by Longyan Agricultural Research Institute.The purple potato is spindle-shaped,the peel is dark purple,and the flesh is dark purple.The number of sweet potatoes per plant was 4.60,the dry matter rate of fresh tubers was 36.26%,the starch rate in district test was 25.18%,the soluble sugar content was 3.42%,and the anthocyanin content was 519.00 mg·kg^(-1).The dry sample contained 7.13%protein,5.50%sucrose,5.70%reducing sugar and 2.50%dietary fiber,which had a good taste and a smooth and beautiful appearance.Longzi No.12 is resistant to vine cut,black spot and root rot.The yield of fresh potatoes was 2173.21 kg,dried potatoes and starch yields were 786.55 kg and 566.48 kg per 667 m^(2) yespectively in district test in Fujian Province,which were 10.96%,36.63%and 44.66%higher than those of Funingzi No.3,respectively.It is suitable for summer and autumn planting in Fujian,Jiangxi,Guizhou,Sichuan,Guangxi and other places.In 2022,it passed the national registration of non-major crop varieties.