Chuanyu No. 4 (Potato)

(1) Variety source: the crop Institute of Sichuan Academy of Agricultural Sciences used C1an-dia as the female parent and 7XY-1 as the male parent. The original line number was 5-4 in 1991.

(2) characteristics: the rate of large and medium potatoes is 67.6%; the starch content of potato pieces is 14.22%, which is equivalent to that of the control Sichuan taro 56; the content of vitamin C is 10.6 mg / 100 g fresh potatoes; reducing sugar 0.53%. Identified by the plant protection department and production, it is highly resistant to late blight and virus. The dormancy period is short, about 50 days; the growth period is more than 80 days, it is a medium-mature species, the plant emerges neatly, the growth is strong, the potato is round, yellow skin and white meat, it is a fresh potato edible variety.

(3) yield performance: from 1992 to 1994, the average yield of fresh potato per mu was 1624.9 kg per mu in the provincial multi-point test (regarded as the provincial regional trial), which was 18.8% higher than that of the public control virus-free taro 56 and 29.0% higher than that of the landlord; in 1995, the average yield of fresh potato per mu was 1323.5 kg, which was 25.54% higher than that of the landlord.

(4) suitable planting area: suitable for planting in the sloping terrace and sandy land with deep soil layer, good drainage and strong light in the main potato producing areas of our province, and suitable for planting in late epidemic areas, and can be planted in the areas below 1000 meters above sea level for the second season of spring and autumn.