Joint multiple quantitative trait loci mapping for allometries of body compositions and metabolic traits to body weights in broiler
文献类型： 外文期刊
作者： Zhou, X. 1 ; Zhang, Y. 3 ; Zhang, H. 1 ; Du, J. 4 ; Ye, J. 1 ; Xu, Y. 1 ; Yang, R. 4 ;
作者机构： 1.Heilongjiang Bayi Agr Univ, Dept Informat & Comp Sci, 5 Xinfeng Rd, Daqing 163319, Peoples R China
2.Heilongjiang Bayi Agr Univ, Bioinformat Res Lab, 5 Xinfeng Rd, Daqing 163319, Peoples R China
3.Heilongjiang Bayi Agr Univ, Coll Anim Sci & Vet Med, 5 Xinfeng Rd, Daqing 163319, Peoples R China
4.Chinese Acad Fishery Sci, Res Ctr Aquat Biotechnol, 150 Qingta West Rd, Beijing 100141, Peoples R China
关键词： relative growth; random regression model; organ tissue; quality trait; linkage analysis
期刊名称：ANIMAL （ 影响因子：3.24； 五年影响因子：3.223 ）
ISSN： 1751-7311
年卷期： 2020 年 14 卷 6 期
页码：
收录情况： SCI
摘要： In order to map quantitative trait loci (QTLs) for allometries of body compositions and metabolic traits in chicken, we phenotypically characterize the allometric growths of multiple body components and metabolic traits relative to BWs using joint allometric scaling models and then establish random regression models (RRMs) to fit genetic effects of markers and minor polygenes derived from the pedigree on the allometric scalings. Prior to statistically inferring the QTLs for the allometric scalings by solving the RRMs, the LASSO technique is adopted to rapidly shrink most of marker genetic effects to zero. Computer simulation analysis confirms the reliability and adaptability of the so-called LASSO-RRM mapping method. In the F-2 population constructed by multiple families, we formulate two joint allometric scaling models of body compositions and metabolic traits, in which six of nine body compositions are tested as significant, while six of eight metabolic traits are as significant. For body compositions, a total of 14 QTLs, of which 9 dominant, were detected to be associated with the allometric scalings of drumstick, fat, heart, shank, liver and spleen to BWs; while for metabolic traits, a total of 19 QTLs also including 9 dominant be responsible for the allometries of T4, IGFI, IGFII, GLC, INS, IGR to BWs. The detectable QTLs or highly linked markers can be used to regulate relative growths of the body components and metabolic traits to BWs in marker-assisted breeding of chickens.
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