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Received: 2007-09-16

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Journal of Zhejiang University SCIENCE B 2007 Vol.8 No.11 P.822-830

http://doi.org/10.1631/jzus.2007.B0822


Evaluation of the effect and profitability of gene-assisted selection in pig breeding system


Author(s):  LI Ya-lan, ZHANG Qin, CHEN Yao-sheng

Affiliation(s):  College of Animal Science, South China Agricultural University, Guangzhou 510642, China; more

Corresponding email(s):   chyaosh@mail.sysu.edu.cn

Key Words:  Swine, Gene-assisted selection (GAS), Selection efficiency, Extra returns


LI Ya-lan, ZHANG Qin, CHEN Yao-sheng. Evaluation of the effect and profitability of gene-assisted selection in pig breeding system[J]. Journal of Zhejiang University Science B, 2007, 8(11): 822-830.

@article{title="Evaluation of the effect and profitability of gene-assisted selection in pig breeding system",
author="LI Ya-lan, ZHANG Qin, CHEN Yao-sheng",
journal="Journal of Zhejiang University Science B",
volume="8",
number="11",
pages="822-830",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.B0822"
}

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%T Evaluation of the effect and profitability of gene-assisted selection in pig breeding system
%A LI Ya-lan
%A ZHANG Qin
%A CHEN Yao-sheng
%J Journal of Zhejiang University SCIENCE B
%V 8
%N 11
%P 822-830
%@ 1673-1581
%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.B0822

TY - JOUR
T1 - Evaluation of the effect and profitability of gene-assisted selection in pig breeding system
A1 - LI Ya-lan
A1 - ZHANG Qin
A1 - CHEN Yao-sheng
J0 - Journal of Zhejiang University Science B
VL - 8
IS - 11
SP - 822
EP - 830
%@ 1673-1581
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.B0822


Abstract: 
Objective: To evaluate the effect and profitability of using the quantitative trait loci (QTL)-linked direct marker (DR marker) in gene-assisted selection (GAS). Methods: Three populations (100, 200, or 300 sows plus 10 boars within each group) with segregating QTL were simulated stochastically. Five economic traits were investigated, including number of born alive (NBA), average daily gain to 100 kg body weight (ADG), feed conversion ratio (FCR), back fat at 100 kg body weight (BF) and intramuscular fat (IMF). Selection was based on the estimated breeding value (EBV) of each trait. The starting frequencies of the QTL’s favorable allele were 0.1, 0.3 and 0.5, respectively. The economic return was calculated by gene flow method. Results: The selection efficiency was higher than 100% when DR markers were used in GAS for 5 traits. The selection efficiency for NBA was the highest, and the lowest was for ADG whose QTL had the lowest variance. The mixed model applied DR markers and obtained higher extra genetic gain and extra economic returns. We also found that the lower the frequency of the favorable allele of the QTL, the higher the extra return obtained. Conclusion: GAS is an effective selection scheme to increase the genetic gain and the economic returns in pig breeding.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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