柚新品种‘老哥贡柚’的选育

The breeding of a new pomelo cultivar‘Laoge Gongyou’

‘老哥贡柚’是从‘冰糖柚’优良芽变中选育出的新品种。‘老哥贡柚’树势较强,枝梢较密,坐果率高。果实圆锥形,果皮浅黄色,果面光滑,油胞密集,果肉白色。纯甜无酸,食后无麻苦味,平均单果质量712 g,少核或无核,可溶性固形物含量(w,后同)为12.3%,总糖含量11.32%,总酸含量0.35%,可滴定酸含量0.22%,维生素C含量0.469 mg·g^-1。10月中下旬成熟,丰产、稳产,抗逆性强。

‘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 1012 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 is 4.5%,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 climate 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.