Evaluation of Genetic Gain for Harvest Body Weight in Turbot (Scophthalmus Maximus, Linnaeus) After Three Generations

doi:10.11924/j.issn.1000-6850.casb2021-0016

Abstract

Abstract:

The genetic parameters and genetic progress of harvest weight of turbot after breeding in three generations (G0, G1, G2 and G3) were evaluated. The data included 12,980 individuals from 590 families. The estimated heritability of harvested weight traits of G0, G1, G2 and G3 was 0.19±0.08, 0.18±0.09, 0.51±0.09 and 0.29±0.16, respectively, and the heritability across generations was 0.16±0.03. Based on the average estimated breeding value of all individuals and retained parental species in each generation, the selection differential is calculated, 45.6 g in G0, 13.1 g in G1, -27.9 g in G2, respectively, 10.3 g per generation. Genetic progression was 10.2 g, 37.4 g, and 0.3g, equivalent to 2.06%, 8.76%, and 0.04%, respectively. The cumulative genetic progress after three generations was 10.86% of body weight, with an average of 3.56% per generation, indicating that the breeding of weight traits of turbot was generally successful.

Key words: turbot, selective breeding, weight, genetic gain

CLC Number:

S962.1

Sun Song, Hu Yulong, Lv Ding, Wang Weiji. Evaluation of Genetic Gain for Harvest Body Weight in Turbot (Scophthalmus Maximus, Linnaeus) After Three Generations[J]. Chinese Agricultural Science Bulletin, 2021, 37(35): 118-123.

Figures/Tables 4

References 30

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世代	年份	全同胞家系数	个体数	平均每个家系个体数	收获体重最小二乘均值/g
G0	2006	55	1311	23.84	444.11
G0	2007	57	3790	66.49	444.11
G1	2009	71	995	14.01	494.94
	2011	95	985	10.36
	2012	38	798	21
G2	2013	79	1887	23.89	427.32
	2014	97	932	9.6
	2016	48	1193	24.85
G3	2017	22	164	7.45	817.01
G3	2019	31	925	29.84	817.01

世代	年份	全同胞家系数	个体数	平均每个家系个体数	收获体重最小二乘均值/g
G0	2006	55	1311	23.84	444.11
G0	2007	57	3790	66.49	444.11
G1	2009	71	995	14.01	494.94
	2011	95	985	10.36
	2012	38	798	21
G2	2013	79	1887	23.89	427.32
	2014	97	932	9.6
	2016	48	1193	24.85
G3	2017	22	164	7.45	817.01
G3	2019	31	925	29.84	817.01

世代	加性遗传效应方差σ_a²	母本及共同环境效应方差σ_d²	残差方差σ_e²	表型方差σ_p²	遗传力h²±se	母本和共同环境效应c²±se
G0	3618.22	1599.16	13588.4	18806.8	0.19±0.08	0.09±0.03
G1	3318.81	1452.30	13626.2	18397.31	0.18±0.09	0.07±0.04
G2	2566.51	461.633	2040.50	5068.64	0.51±0.09	0.08±0.03
G3	8217.04	412.019	19258.5	27888.5	0.29±0.16	0.01±0.05
跨世代	2576.20	1664.72	11833.9	16075.82	0.16±0.03	0.28±0.02

世代	加性遗传效应方差σ_a²	母本及共同环境效应方差σ_d²	残差方差σ_e²	表型方差σ_p²	遗传力h²±se	母本和共同环境效应c²±se
G0	3618.22	1599.16	13588.4	18806.8	0.19±0.08	0.09±0.03
G1	3318.81	1452.30	13626.2	18397.31	0.18±0.09	0.07±0.04
G2	2566.51	461.633	2040.50	5068.64	0.51±0.09	0.08±0.03
G3	8217.04	412.019	19258.5	27888.5	0.29±0.16	0.01±0.05
跨世代	2576.20	1664.72	11833.9	16075.82	0.16±0.03	0.28±0.02