›› 2009, Vol. 36 ›› Issue (8): 67-72.

• 遗传繁育 • Previous Articles     Next Articles

Research on the Efficiency of Marker-assisted Selection in Pig Breeding System

LI Ya-lan1,2，ZHANG Hao1，ZHANG Qin3，WANG Qing-lai4，CHEN Yao-sheng5   

  1. （1.College of Animal Science, South China Agricultural University, Guangzhou 510642，China； 2.Institute of Animal Science, Guangdong Academy of Agricultural, Guangzhou 510640，China； 3.College of Animal Science, China Agricultural University, Beijing 100193，China；4.Guangdong Huanong Wins Animal Husbandry Co.Ltd., Xinxing 527400，China； 5.College of Life Science, Sun Yat-Sen University, Guangzhou 510006，China）
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-08-20 Published:2009-08-20
  • Contact: CHEN Yao-sheng

Abstract: The found of the genetic markers tightly linked to the Quantitative Trait Loci (QTL) and some major genes for economic traits in husbandry animals has led to more and more research focusing on MAS (marker-assisted selection) and GAS ( gene-assisted selection). According to the distance between the genetic marker and the QTL, the genetic marker was divided into three types: LE (linkage equilibrium) marker, LD (linkage disequilibrium) marker and DR marker (direct marker, the QTL). To study the selection efficiency for 5 traits selected in the swine breeding plan by LE, LD and DR marker in MAS and GAS in 5 discrete generations, respectively, 3 closed nucleus base populations were designed: 100, 200, 300 sows, and 10 boars each population, where the pigs were unrelated. The 5 traits were NBA (number born-alive), FCR (feed-conversion ratio), ADG (average daily-gain), BF (Back-fat), IMF (Intramuscular fat). The model to estimate the breeding value of the 5 traits were SBLUP (standard BLUP) model(no marker used), MBLUP model (LD and LE markers used), by QBLUP(DR marker used). The selection efficiency by MAS and GAS was compared for 5 traits using MAS and GAS in 3 populations.

Key words: swine; marker-assisted selection; selection efficiency

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