紫色甘薯新品种龙紫221的选育

A New Purple Sweet Potato Cultivar——‘Longzi 221’

龙紫221是以台湾紫薯为母本,采用田间放任授粉、自然杂交选育而成的鲜食、加工兼用型紫色甘薯新品种。株型半直立,中长蔓,平均单株结薯数5.2个;薯块纺锤形,大中薯率65%左右,薯皮、薯肉均为紫色,平均干物率35.04%,淀粉率24.12%;抗蔓割病,高感薯瘟病,每667 m^(2)鲜薯、薯干产量分别为2 000 kg和700 kg左右,适宜在福建省非薯瘟病高发区作春、夏、秋薯种植。

‘Longzi 221’is a new variety of purple sweet potato with fresh eating and processing,which was bred by opening pollination and natural hybridization with‘Taiwanzishu’as the female parent.It has a semi-erect architecture with medium length vine,and the average single plant tubers number is 5.2.Its tuber is of spindle shape with purple peel and purple flesh,the average proportion of large potato is 65%,and the average dry matter rate and starch content is respectively 35.04% and 24.12%.It is resistant to Fusarium wilt disease,and highly susceptible to sweet potato blast.The yield of fresh tuber is about 30 t · hm~(-2),and dried tuber is about 10.5 t · hm~(-2).It is suitable for spring,summer and autumn potato planting in Fujian Provinces not affected by sweet potato blast.