Determination of Residual Feed Intake and Its Associations with Single Nucleotide Polymorphism in Chickens

XU Zhen-qiang; CHEN Jie; ZHANG Yan; JI Cong-liang; ZHANG De-xiang; ZHANG Xi-quan

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Determination of Residual Feed Intake and Its Associations with Single Nucleotide Polymorphism in Chickens

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Marker assisted selection (MAS) for residual feed intake (RFI) is considered to be one of the powerful means to improve feed conversion efifciency, and therefore reduce production costs. To test the inner relationship among body compositions, growth traits and RFI, four models were proposed to assess the extensively explanatory variables accounting for partial variables in feed intake besides metabolic body weight and growth rate. As a result, the original model (Koch’s model) had the lowest R2 (80.78%) and the highest Bayesian information criterion (1 323.3) value among the four models. Moreover, the effects on RFI caused by single nucleotide polymorphisms (SNPs) were assessed in this study. Twelve SNPs from 7 candidate genes were genotyped in 2 Chinese native strains. rs14743490 of RPLP2 gene showed suggestively signiifcant association with initial body weight in both strains (P<0.10). rs15047274 of TAF15 was signiifcantly associated with growth weight, ifnal weight, and feed intake (P<0.05) in N301 strain, in contrast, it was only suggestively signiifcant associated with feed intake (P<0.10) in N414 strain. rs15869967 was signiifcantly associated with RFI in N414 strain but not in N301 strain. This study has identiifed potential genetic markers suitable for MAS in improving the above mentioned traits, but these associations need to be rectiifed in other larger populations in future.

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《农业科学学报（英文版）》 |2014年第1期|148-157|共10页
作者
XU Zhen-qiang; CHEN Jie; ZHANG Yan; JI Cong-liang; ZHANG De-xiang; ZHANG Xi-quan;
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Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding/Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture/South China Agricultural University, Guangzhou 510642, P.R.China;

Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding/Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture/South China Agricultural University, Guangzhou 510642, P.R.China;

Wens Nanfang Poultry Breeding Co. Ltd., Yunfu 527400, P.R.China;

Wens Nanfang Poultry Breeding Co. Ltd., Yunfu 527400, P.R.China;

Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding/Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture/South China Agricultural University, Guangzhou 510642, P.R.China;

Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding/Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture/South China Agricultural University, Guangzhou 510642, P.R.China;

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Determination of Residual Feed Intake and Its Associations with Single Nucleotide Polymorphism in Chickens

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