Introduction of main walnut germplasm resources in China

  Walnut, in our country there are walnut, Qiang peach, long live son and other aliases, called Persian walnut abroad, English walnut or European walnut, is an important nut tree species in the world.

Picture: Walnut

  Juglans regia belongs to Juglans genus of Juglans family. There are more than 10 species of Juglans regia which are valuable for cultivation.

  1. Common walnut is the most widely used tree species in Juglans. It is cold, drought and not wet. It has many varieties and types, and its fruiting age is early or late. The nut is large, thin, full kernel and excellent quality. It is the main tree species in the main producing countries of walnut in the world and also the main distribution tree species in the main producing areas of walnut in northern China.

  2. Juglans regia is a southern type of Juglans, originating in Yunnan, Guizhou and Sichuan provinces of China. This species is resistant to damp heat, dry weather and cold weather. Its variety type is various, the nut size and shape performance is various, the quality is good, the nuclear outer surface is not smooth, but the kernel is full.

  Walnut machinery originated in Northeast China and the Far East of Russia, relatively early resistance, extremely cold resistance, can withstand-50℃ low temperature. Nuts have thick shells, and the kernels are difficult to remove from the shells.

  4. Hebei walnut is an interspecific hybrid between common walnut and walnut, also known as hemp walnut. Tall trees, nuts subglobose, 8-sided, thick, small edible kernel. Walnut rootstock, the development of hemp walnut crafts called Wenwan walnut, the market prospects in the past two years.

  5. Black walnut This species is native to the American continent, cold resistance, drought resistance, strong adaptability to adverse environments, high edible value of nuts, and is an excellent tree species for both materials and fruits.

  In addition, there are walnut and other species of hickory, common wild walnut, also known as hickory, distributed in most parts of our country, shell thick and angular, kernel small edible, can be used as walnut rootstock. In addition, gray walnut, Jibao walnut, heart-shaped walnut, North California black walnut, small fruit walnut, fruit walnut, long fruit walnut and so on can also be used as potential germplasm materials for walnut production in the future.