Breeding of a fine apricot cultivar, 'Xiajin', for protected cultivation
Xiajin is an early maturing apricot cultivar suitable for protected cultivation. It was selected from seedlings of Jintaiyang with desirable traits. Under greenhouse conditions, Xiajin flowered 3-5 days later than Jintaiyang. However, Xiajin has a short fruit development period (58 days). The fruits matured approximately 7 days earlier than those of Jintaiyang. The average fruit weight of Xiajin was 90.42 g, which is 22 g greater than that of Jintaiyang, and the weight of its biggest fruit was 114.7 g. The dormant period of Xiajin is very short, with a very limited chilling requirement. A low temperature treatment at ≤7°C for 400 h terminated dormancy and initiated blooming and normal fruit bearing. The percentage of full flowers, with pistils either longer than or equal in length to that of the stamens, was over 90%, whereas those with pistils shorter than stamens or degraded stamens was lower than 10%. After planting, the fruit yield of individual trees in the fifth year was 5.6 kg, equivalent to 940.8 kg mu‑1. In the sixth year, the density of trees was adjusted to 168 trees mu‑1. From the sixth to the eighth year, the fruit yield of individual trees stabilized at 8.99 kg, corresponding to 1510 kg mu‑1 and 30,200 RMB yuan output value. Grown in greenhouses in Yuncheng district of Shanxi Province, the cultivar can completely avoid the effects of late frost and other natural disasters and realize stable and efficient production and, therefore, it is a promising greenhouse-grown apricot cultivar.
Zhai, Q.Y. and Liu, Z.H. (2018). Breeding of a fine apricot cultivar, 'Xiajin', for protected cultivation. Acta Hortic. 1214, 199-202
facility cultivation,'Xiajin' apricot, breeding