(4) Jin Shu 16 was bred by Crop Research Institute of Alpine Region of Shaanxi Academy of Agricultural Sciences. The plant type is upright, the plant height is about 106 cm, and the number of branches is 3~6. The leaves are slender and dark green; Corolla white, naturally fruitless, berries green, with seeds. Potatoes are oblong in shape, smooth in skin, yellow in skin and white in flesh, and have medium bud eye depth. The plants are neat and concentrated, with 4-5 tubers per plant, and the rate of large and medium tubers is about 95%. Tubers have a moderate dormancy period and are resistant to storage. Mid-late maturity varieties, from emergence to maturity 1 10 days or so. It is suitable for planting potatoes in the northern one-season planting area, and the planting density is 3000~3500 holes per mu. (5) The mid-mature variety Kexin 1 growth period is about 100 days. The plant is erect, with medium number of branches, stout stems and thick leaves, and the plant height is about 70 cm. Corolla lavender, stamens yellow-green, pollen sterility, pistil abortion, unable to bear fruit naturally, as a hybrid parent. Tubers are oval or round, with yellowish skin, white flesh, smooth skin, large and neat pieces, medium bud eye depth, long dormancy period and storage resistance. Plants are resistant to late blight, tuber disease, ring rot, PVY and PLRV. The yield is generally 1500 kg, and the high yield can reach more than 3000 kg, with great potential for increasing production and strong drought resistance. Suitable for planting in Heilongjiang, Jilin, Liaoning, Hebei, Inner Mongolia, Shanxi, Shaanxi, Gansu and other places, the suitable density is 3500 plants/mu. (6) The middle and late maturity of Shu Tong 20 is 100~ 1 10 days. Tubers are round, flesh is yellow, skin is smooth, eye depth is moderate, eyebrows are curved, and buds are not obvious. The number of tubers per plant is 4.7. Strong growth potential, drought resistance and barren resistance. Tubers expand rapidly and have great yield potential; The potato pieces are large and tidy, and the commodity rate is 60.8%~73.0%, with good commodity and storage resistance. The steamed food is of good quality. Suitable for planting in most areas of North China, Northwest China and Northeast China. (7) Atlantic American varieties. Tubers are between round and oval in shape, and the epidermis has a slight reticulation. Tubers that are too big are often hollow, fleshy and rich in starch, which are suitable for frying and boiling. Resistant to potato virus A, virus X, leaf curl, reticular necrosis, golden nematode A, late blight and trauma, sometimes brown spots appear on potato meat in dry season. The plant is moderately lush, stout and erect, with large and rough leaves, green corolla, lilac, few and shallow bud eyes, belonging to high water and fertilizer varieties. The maximum yield per mu is 2800 kg, the average yield is more than 1500 kg, and the growth period is 90 days. Desiree was introduced from Holland. The plant is semi-erect, with few branches, the plant height is 55~60 cm, with 4~5 branches, and the leaves are small and firm. Strong growth potential, stout stems, with obvious brownish red. Corolla purple, more pollen, more natural fruits. Each plant has 4~5 tubers, which are large, and it takes 105~ 1 10 days from emergence to harvest. The average yield per mu is 1700 kg, and the highest yield per mu is 2500~3000 kg. The rate of commercial potato is over 80%. Potato-shaped oval with red skin, bright yellow meat and smooth skin; The number of buds is small, the consistency of potato shape is good, it is straight and beautiful, the buds are shallow, the dormancy period is long, the storage resistance is medium and high, the dry matter is high, there is no discoloration effect after cooking, and the cooking taste is excellent and sweet. Early resistance is strong, and it can be planted in both flood and drought, especially in dry land. The planting density is about 3500 plants. Seed potatoes should be cultivated, fertilized and watered as soon as possible, and should not be watered after flowering to prevent secondary potatoes from appearing and affecting the appearance of potatoes. (9) It takes about 70 days for the early-maturing variety Kexin No.4 to emerge from seedling to harvest. The plant type is upright, the plant height is about 65 cm, and there are few branches. The stems are green, the compound leaves are medium-sized, the flowers are white, the petals are heavy and the flowers are deformed. Pollen sterility, no natural fruit, flat and neat tubers, yellow skin and light flesh, shallow buds. Strong storability, concentrated tubers, and the commercial potato rate is over 80%. Short dormancy period, suitable for double cropping and multiple cropping in one year. Strong denaturation resistance, tubers have high resistance to late blight. Good taste, it is an excellent variety suitable for summer sowing and virus-free seed retention, with good yield, per mu 1800~2000 kg. It is suitable for planting in most parts of northern China, especially in suburban areas and areas where crops are harvested twice a year. The suitable planting density is about 4500 plants per mu. (10) Zhongshu No.5, an early-maturing variety, takes about 60 days from emergence to harvest. The plant type is upright, the plant height is about 55 cm, and the growth potential is strong. The stems are green, the compound leaves are medium-sized, the leaves are flat, the leaves are dark green, and there are few branches. Corolla white, medium natural fruit and seeds. Tubers are slightly oblate, with yellow skin and flesh, and smooth, large and tidy skin. In spring, the rate of large and medium potatoes can reach 97.6%, with extremely shallow bud eyes and concentrated tubers. The fried food is of high quality and the fried potato chips are light in color. Generally, the yield per mu is about 2000 kilograms. Suitable for planting in northern plain in spring and autumn.