The breeding of a new pomelo cultivar ‘Laoge Gongyou’

Abstract: ‘Laoge Gongyou’, a new pomelo cultivar, originated from a bud mutation of‘Bingtangyou’. It has strong tree vigor, dense branches and high fruit setting ability. The fruit is cone-shaped with light yellow peel, smooth surface, dense oil glands and white flesh. Its shape index is 1.1. The average single fruit weight is about 712 g, the maximum single fruit weight is 1 012 g, and per fruit seeds is 0-8. The results showed that the yield of juice is 43.5%, soluble solid content is 12.3%, reducing sugar is4.5%, total sugar is 11.32%, total acid is 0.35%, titratable acid is 0.22%, the ratio of sugar to acid is 32:34, vitamin C content is 0.469 mg · g^-1. The fruit taste is pure sweet and acid free, no bitterness and numbness. The initial flowering stage in mid-April. The flower number of inflorescence is 5-13, with high germination rate and branching ability. The fruit growth period is about 160 days. Generally the fruits ripen in mid- October in Huaihua (109.95 E, 27.5 N). The cultivar has strong cold resistance,drought resistance and disease resistance. The shelf-life is 180 days at room temperature and can be stored for 7 months (no need refrigerated in Huaihua). It is suitable for planting in warm and humid cli- mate areas with the temperature of 22-30 ℃, and minimum temperature can not be less than -5 ℃. Such as southern Hunan, western Hunan, Guangxi, Guangdong and Yunnan provinces are suitable for cultivation. It will bear fruit in the second year and high yield after three years.