'Longshu No.23'is a new processing type potato variety selected through sexual hybridization with'Yan 97-8'as female parent and'L0404-6'as male parent.It is of medium-late maturity.Its growth period is about 95 days,a large and medium-sized potato rate of about 80％.The average single potato weight is of 115.5 g,and 7.25 potatoes per plant.The plant is semi upright.Its tuber is of round,with yellow skin,light yellow flesh,and shallow bud eyes.The dry matter content is 24.83％,and starch content is 18.36％.It can yield about 45 t·hm-2.It is suitable for planting in the northern regions of Gansu,Shaanxi,Xinjiang,Qinghai,and Ningxia.
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