A few days ago, the Ministry of Agriculture and Rural Affairs announced the new varieties of aquatic products approved in 2021, and the kelp "Zhongbao No. 1" and wen clam "Kezhe No. 2" cultivated by the Institute of Oceanography of the Chinese Academy of Sciences were on the list. It is understood that the two new varieties have the advantages of high yield and high survival rate. Under the same breeding conditions, the production of "Zhongbao No. 1" increased by an average of 63.9% in mid-to-late July compared with ordinary cultured kelp, and the survival rate of "Kezhe No. 2" increased by an average of 28.2% and the yield of 25.6% compared with unselected clams.
Kelp "Zhongbao No. 1" was cultivated over a period of 10 years by the research team of The Seaweed Germplasm Bank of the Institute of Oceanology of the Chinese Academy of Sciences, The Research Team of The Seaweed Germplasm Bank and Dalian Haibao Fisheries Co., Ltd. adopted the hybridization of kelp geographical isolation populations, combined with directional breeding, microsatellite molecular marker assistance and other technical means.
This variety has the obvious advantages of high yield, wide algae body, dark green color of blanching processing, high yield rate, and no formation of sporangia during cultivation. Under the same cultivation conditions in the northern region, compared with ordinary cultured kelp, the yield in mid-to-late July increased by an average of 63.9%, and the processing rate of blanched vegetables increased by more than 10%, which is suitable for cultivation in artificially controllable seawater water bodies in Shandong, Liaoning and other coastal areas. The large-scale application of this variety will effectively promote the development of the industrialization of kelp seeds and improve the coverage rate of fine seeds.
Wen clam "Kezhe No. 2" is a stable-yielding and high-yield new species of clams obtained by hybrid breeding for more than ten years by liu baozhong research team of the seaweed germplasm team of the Institute of Oceanography of the Chinese Academy of Sciences and the Zhejiang Institute of Marine Aquaculture, which are found in the summer shallow sea culture environment, with strong vibrio resistance and high survival rate as the breeding goal.
Compared with the unselected clams, the ability to resist Vibrio parahaemolyticus was increased by an average of 44.2%, and under the same breeding conditions, the survival rate of culture was increased by an average of 28.2%, and the yield was increased by 25.6%, which effectively avoided the occurrence of Vibrio disease scale in actual breeding and production, and was suitable for breeding in artificially controllable ponds and tidal flats in Shandong, Zhejiang and other coastal areas, adding seed source guarantee for the green development of the domestic shellfish breeding industry.
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