Hybrid selective breeding technique for high-quality, high-yield sea urchins

Abstract

A hybrid selective breeding technique for high-quality, high-yield sea urchins includes the following steps: selecting sea urchins into a breeding farm from various geographical groups, and culturing the sea urchins until the sea urchins become mature; establishing at least 100 sea urchin families according to the female-to-male ratio of 2:1; culturing the sea urchins until the breeding season, randomly selecting sea urchins from at least twenty families, selecting thirty sea urchins from each family, and measuring weights, wet gonad weights, colors, Beta-carotene content, high-unsaturated fatty acid content, composition and other characters as information characters; formulating a comprehensive selection index for each character, queuing all the families according to calculated comprehensive selection indexes I, selecting 50 percent of families from the top, selecting individual sea urchins with the high comprehensive selection indexes I from the top of the selected families according to the female-to-male ratio of 2:1, so that the breed reservation rate can be less than or equal to 2 percent, and on the premise of preventing inbreeding, establishing at least 100 sea urchin families; and repeating the steps. The hybrid selective breeding technique for high-quality, high-yield sea urchins can breed sea urchins with stable characters and high quality.

Description

technical field [0001] The invention relates to a compound breeding technology of high-quality and high-yield sea urchins. Background technique [0002] The edible part of sea urchins is mainly gonads, and improving the yield and quality of gonads is an important research direction for sea urchin breeding. The wet weight of gonads is an index to measure the yield of sea urchins; the color of gonads is an important indicator for the classification of sea urchins in Japanese and European markets; the content of β-carotene not only affects the color of gonads of sea urchins but also plays an important role in its reproductive traits; Main nutrients; because gonads are difficult to measure in vivo, gonad quality traits cannot be used as target traits for direct selection. In this case, single gonad quality traits can be achieved through indirect selection index selection, but increasing the gonad quality traits of sea urchins one by one will Ignoring other quality traits may re...

AI Technical Summary

Problems solved by technology

The wet weight of gonads is an index to measure the yield of sea urchins; the color of gonads is an important indicator for the classification of sea urchins in Japanese and European markets; the content of β-carotene not only affects the color of gonads of sea urchins but also plays an important role in its reproductive traits; Main nutrients; because gonads are difficult to measure in vivo, gonad quality traits cannot be used as target traits for direct selection. In this case, single gonad quality traits can be achieved through indirect selection index selection, but improving the gonad quality traits of sea urchins one by one, will Ignoring other quality traits may cause the loss of excellent genes for these traits, resulting in low selection efficiency, or failure to improve the quality of gonads as a whole

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