The Breeding of Gynoecious Hybrid Industrial Hemp Variety Yunmaza 4(Cannabis sativa L.)and Its Application Prospect
Yunmaza 4 is a single cross hybrid variety bred by scientists from the Industrial Crops Re-search Institute,Yunnan Academy of Agricultural Sciences.It is a hybrid progeny of Yunma 8×2017M5,with dioecious inbred line Yunma 8 acted as female parent and the monoecious inbred line 2017M5 as the pollen provider.Based on the regional trials conducted during 2020-2021,the average yield of inflorescence and leaf of Yunmaza 4 was 3012.45 kg/hm2,increasing 34.82%than that of the Yunma 8(CK).The hybrid progeny F1 exhibited almost unisexual female with more than 95%female in-dividuals.The whole growth period of Yunmaza 4 is about 167 days with the average THC content reaches 0.07%,average CBD content reaches 3.06%,oil content reaches 31.80% and the protein content of hemp seeds reaches 23.0%.Yunmaza 4 is suitable to be planted in most regions of Yunnan Province with optimum altitudes ranged from 1500 m to 2300 m above sea level.This cultivar has passed the assessment organized by the Yunnan Provincial Seed Management Station and has been registered in 2023.