1. Desiree

Variety Source: Parents: Uurgenta*Depesc is a breed bred in the Netherlands.

characteristics: the plant is semi-erect, with few branches, the plant height is 55-6 cm, with 4-5 branches, and the leaves are small and firm. 4-5 pairs of lateral leaflets, with gray-green leaves, strong growth potential, stout stems and obvious brownish red. The corolla is purplish red, with abundant pollen and many natural fruits. There are 4-5 tubers with large tubers, and the growth period is 15-11 days. The yield is generally 17 kg per mu, and the highest yield is 25-3 kg per mu. The commercial potato rate is over 8%. Red skin, bright yellow meat color, smooth skin.

The potato shape is long and oval, with fewer bud eyes, good consistency, straight and beautiful appearance, shallow bud eyes and long dormancy period. The storage resistance is medium to high, the dry matter is high, and the starch content is 15. 6%, the reducing sugar content is lower than . 4%, no discoloration after cooking. It is sensitive to mosaic virus PVX and PVA, highly resistant to PVY and moderately resistant to leaf curl virus PLRV. Late blight: the plants are moderately resistant and the tubers are slight. Ring rot: the plants are resistant to tubers. Cancer: immunity. The cooking taste is excellent, the taste is sweet and soft, the color of fried chips is medium-upper, the taste is good, and the cooking discoloration is weak.

key points of cultivation: it has strong drought resistance and can be planted in both flood and dry land, especially in dry land. The planting density is about 35 plants. Seed potatoes emerge quickly, so intertillage, fertilization and watering should be done as early as possible, and watering should not be done after flowering to prevent secondary potatoes from appearing and affecting the appearance of potatoes.

2. Shepody

It was bred in Canada in 198, and was introduced to China for trial planting from the United States in 1987.

characteristics: this variety belongs to middle maturity, from sowing to maturity for about 12d days. The stems are green, stout, multi-branched, spreading, and the leaves with plant height of 6 ~ 8 cm are alternately covered with oval shapes, which are dense and light green; The flowers are light purple (some plants are white flowers), the tips of petals are accompanied by white, and they bloom earlier, with more flowers and the top flowers growing, and the flowering period is longer; The tubers are early and concentrated, and the tubers grow obliquely upward; Tubers are oval in shape, generally more than 1Ocm long, larger than 2Ocm, with white skin and meat, smooth epidermis and extremely shallow bud eyes. The rate of big potato (more than 28g) is high. The dry matter content of tuber is 19% ~ 23%, reducing sugar is .2%, and the commodity rate is 8% ~ 85%.

Shapoto has strict requirements on cultivation conditions, and is not drought-resistant or waterlogging-resistant, especially sensitive to waterlogging. I like sandy loam with strong permeability and fat water. It degenerates quickly, is sensitive to early blight, late blight and scab, and is susceptible to PVX and PVY viruses, and the tuber infection rate is high.

yield: the yield level varies greatly with the difference of production conditions, with a yield of 15～3kg per 667m2.

use: it is mainly used for frying strips. At present, small and medium-sized potato chips can also be used as a substitute for fried chips when domestic potato chips can't meet the market demand.

3. Kexin No.4

Variety source: Potato Research Institute of Heilongjiang Academy of Agricultural Sciences was bred in 1963 by crossing Pulsatilla as female parent and Katadin as male parent. In 197, it was decided to be popularized in the whole province. In 1984, it was approved by the National Crop Variety Approval Committee as a national variety and popularized throughout the country.

Botanical characteristics: the plant type is upright, the plant height is about 65cm, and there are few branches. The stems are green, the compound leaves are medium-sized, the flowers are white, with heavy petals, and the flowers are abnormal. Pollen infertility, no natural fruiting, flat and round tubers, neat, yellow skin and light flesh, shallow buds. Strong storability and concentrated tubers.

biological characteristics: early-maturing varieties, the growth days are about 7 days (from emergence to withered stems and leaves). Short dormancy period, suitable for double cropping and multiple cropping, strong anti-degradation ability, PVY resistance, allergic to PSTV field, and elimination effect. Mildly susceptible to PLRV, plants were infected with late blight, but tubers were highly resistant to late blight. It has good taste and is an excellent variety suitable for summer sowing and virus-free seed retention. The commercial potato rate is above 8%, the starch content is about 13%, the Vc content is 14.8 mg/1 g of fresh potato, and the reducing sugar is .13%.

main cultivation points and scope of application: it is suitable for cultivation in Heilongjiang, Jilin, Liaoning, Inner Mongolia, Henan, Hebei, Beijing, Tianjin, Shandong, Shanghai, Guangxi, Hubei, Anhui and other provinces and cities. Because of its early maturity, it is especially suitable for cultivation in urban suburbs and double cropping areas. The suitable planting density is about 45 plants per mu. High yield, the yield per mu is more than 18-2 kg.

4. Atlantic

American variety. The shape of tubers is between round and oval, and the epidermis has slight reticulation. Too large tubers are often hollow, fleshy and rich in starch, which is suitable for frying and cooking. It is resistant to potato A, X, leaf curl, reticular necrosis, golden nematode type A, O race of late blight and trauma, and sometimes brown spots appear on potato meat in dry season. The plant is moderately lush, strong and erect, with rough leaves and green flowers, lilac corolla, few and shallow bud eyes, and belongs to a high water and fertilizer variety. The highest yield reached 28 kg/mu, with an average yield of more than 15 kg/mu, and the growth period was 9 days.

5. Favorita

Dutch variety. The plant type is erect, with few branches, the plant height is about 5 cm, the tuber is oval, the epidermis is smooth, the skin color is light yellow, the flesh color is dark yellow, the bud eyes are few and shallow, the tuber is concentrated, the tuber expands quickly, the dormancy period is short, and it is more resistant to storage.

Early maturity, the growth period is about 8 days, and the tuber contains 12-14% starch, .5% reducing sugar, 1.55% crude protein, 13.6 mg/1g VC and 17.7% dry matter. Good eating quality; Plants are susceptible to late blight, but they can avoid diseases because of early maturity, and are resistant to Y virus and leaf curl virus. Generally, the yield per mu is 17 kg, and the commercial potato rate is over 8%. Suitable for precocious cultivation with plastic film mulching. Like water and fertilizer, it should be planted in close density, with 4-45 plants per mu. Re-apply base fertilizer, early intertillage and early topdressing.