Multi-family hybridization seed production method of prawn

Abstract

The invention provides a multi-family hybridization seed production method of prawn, belonging to the field of genetic breeding of aquatic products. The method specifically comprises the following steps of: through setting and calculating a selection index, selecting high-quality families and individuals to construct a propagation starting group; setting an upper limit of relationship coefficient, designing a plurality of mating groups by taking the families as units, establishing a single-level propagation unit and constructing a single-level propagation group; designing the mating groups according to the production capacity and market demand of offspring seeds by virtue of a previous-level propagation unit under the condition of a limited relationship coefficient, establishing a new level of propagation unit and constructing a multi-level propagation group; carrying out grouped or hybrid seed production by using the propagation unit in the single-level propagation unit or the multi-level propagation group so as to produce and supply commercial offspring seeds for prawn farmers. Based on the characteristic that female prawn has a high egg laying amount, a single-level or multi-level propagation method is designed, selection with a certain intensity is performed on each level of propagation group so as to quickly transfer and magnify the obtained genetic increment, the propagation mode is flexible in design and can meet different demands on offspring seeds.

Description

Technical field: [0001] The invention belongs to the field of aquatic genetics and breeding, and specifically relates to a method of using the high fecundity characteristics of prawns to group and mate a plurality of high-selection index families, perform multi-stage multiplication and implement individual selection, and finally establish high-performance broodstock multiplication group production The method of commercial seedlings. Background technique: [0002] Most aquatic animals, such as fish, shrimp and shellfish, are small in size and large in egg production. It is easy to establish full-sib and half-sib families. The accuracy of genetic evaluation is high, and high-intensity selection can achieve higher genetic progress than domestic animals. (SKaarud et al., 2011. Strategies for controlling inbreeding in fish breeding programs; an applied approach using optimum contribution (OC) procedures. Aquaculture, 311: 110-114). Especially since the mid-to-late 1990s, after t...

AI Technical Summary

Problems solved by technology

However, the shrimp breeding technology system is still in its infancy. At present, a reliable and efficient multiplication system is urgently needed to amplify and quickly transfer the genetic increment obtained in each generation, produce high-quality commercial seedlings, and improve the coverage rate and Economic benefits of farming

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