Breeding report of a new muskmelon cultivar 'Yinyun'

Abstract:‘Yinyun'is a new medium ripening cultivar, which selected from a cross‘09 W26'and‘09 w28'in 2009 on field.‘09 W26'was isolated from the progeny of‘Tainong No.2'which from Taiwan‘Nongyou'and inbreeded for eight generations.‘09 w28'was isolated from the progeny of the United States melon and inbreeded for eight generations. The fruit is oval shape and white pericarp color. The melon placenta color is orange and flesh thickness is 4.5-5.0 cm, the soluble solid content of central flesh is above 16.5% and the contains of vitamin C is 0.199 mg·g^-1.The average fruit weight is about 2.24 kg. The color of seed coat is cream and the 1 000-seed-weight is about 40. It should be cultivated from February to June in the protected field in Lanzhou (103.2 degrees east longitude and 36.0 degrees north latitude) . The plant growth period is about 95 days, and the fruit growth period is 45 days.From may to August, the plant growth period and fruit mature period are 85 days and 40 days, respectively. The plants are resistant to powdery mildew and downy mildew and other several leaf disease.This variety shows higher resistance to external stresses, such as low temperature and poor light, it also has wide adaptability. It has good transportation and storing. It is also suitable to cultivate in plastic shed or greenhouse. The average yield can reached 3 600 kg per 666.7 m².The optimum seedling density is 1 800-2 200 plants per 666.7 m² in Facility cultivation. The planting spacing in the rows and spacing between rows are about (55-60) cm × (50-65) cm. For vertical-culture, one vine can be remained, and for creeping-culture, three to four vines can be remained. In field cultivation, the optimum planting density is 1 200 plants per 666.7 m², the planting spacing are about (50-55) cm× (100-120) cm. The fertilization is mainly used in base fertilizers including manure and N, P, K compound fertilizers. The water must be controlled strictly during flowering and irrigation should be stopped one week prior to harvest.