Breeding method for Crassostrea sikamea by taking left shell radial ridge number as mark

Abstract

The invention discloses a breeding method for Crassostrea sikamea by taking the left shell radial ridge number as a mark. The method comprises the steps of a, strain dividing: dividing the Crassostrea sikamea into three groups according to the left shell radial ridge number of the Crassostrea sikamea, wherein the three groups comprise a ridge-free strain without a radial ridge, a less-ridge strain with the number of the radial ridges being smaller than or equal to 5 and a multi-ridge strain with the radial ridge number being larger than 6; b, strain self multiplying: taking the 3 strain individuals in the step a as parent samples, performing offspring multiplying by group self multiplying in the strains and then performing normal cultivating; c, strain purifying; taking the strains cultivated in the step b as the parent samples, eliminating the parent sample individuals with the left shell radial ridge number which is not consistent with the strain standards, repeating the group self multiplying in the strain for a plurality of times for offspring multiplying and performing normal cultivating, and performing oriented purifying to obtain a new strain with relatively stable characters. The appearance of the new multi-ridge and less-ridge strains obtained by the method is tidier than that of the traditionally cultivated Crassostrea sikamea, and the yield can be improved by 15-30%.

Description

Technical field: [0001] The invention belongs to the field of shellfish genetics and breeding in modern marine agriculture, and specifically relates to a method of using the number of radial crests on the left shell as a standard [0002] The method of seed production of Kumamoto oyster. Background technique: [0003] Kumamoto oyster Crassostrea sikamea is native to East Asia, distributed in Japan, South Korea and the south of Zhejiang Province in my country, Guangdong, Guangxi, Hainan and other places. They are all wild species and prefer high temperature, medium and high salinity environments, that is, salty areas in brackish and fresh water areas. The production areas are concentrated in the bay and estuary area, and it is a subtropical oyster economic species. In my country, it is the fourth important oyster economic species after Hong Kong oyster, Portuguese oyster, and long oyster, with an annual output of about 100,000 tons, all of which are wild-caught. [0004] Due...

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Problems solved by technology

[0005] So far, except for reports on the geographical distribution and artificial breeding of Kumamoto oysters, there has been no research on its genetics and breeding at home and abroad.

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