首页|期刊导航|中国农业科学（英文版）|Correlation of Individual Heterozygosity of Microsatellite Marker Loci with Heterosis of Growth Traits in Pig Populations
中国农业科学（英文版）2006，Vol.5Issue(8)：635-642,8.
Correlation of Individual Heterozygosity of Microsatellite Marker Loci with Heterosis of Growth Traits in Pig Populations
Correlation of Individual Heterozygosity of Microsatellite Marker Loci with Heterosis of Growth Traits in Pig Populations
摘要
Abstract
To investigate the correlation of individual heterozygosity and heterosis of three traits in crossbred F1 pig populations,the F1 populations were built by random mating Yorkshire × Meishan (YM, n = 82), and its reciprocal (MY, n = 47) and two straightbred populations (Yorkshire = 34, Meishan = 55) were used as control groups. The heterosis of birth weight (BWT),average daily gain (ADG), and feed conversion ratio (FCR) were acquired as well. In the research, the significant marker loci for the heterosis of the three traits were observed by one-way ANOVA (P＜0.01) in a total of 39 marker loci on SSC4,S SC6, SSC7, SSC8, and S SC 13, and the numbers of the significant marker loci were 12 (BWT), 18 (ADG), and 17 (FCR),respectively, based on which the general heterozygosity (GH) was divided into significant marker loci heterozygosity (SH) and insignificant marker loci heterozygosity (IH). Furthermore, the trends of alteration in heterosis with the stepwise increase in heterozygosity by 0.05 were explored. This was done by the regression analysis of the three kinds of heterozygosity against heterosis of the three traits. The results showed that, for BWT, the heterosis increased with the increase in GH (r=0.9337, P=0.0021) and SH (r=0.9165, P=0.0102); for ADG, the heterosis increased with the increase in IH (r = 0.7012, P= 0.0353) and GH (r= 0.7470, P= 0.0537, near significant); for FCR, the heterosis of feed efficiency increased with the increase in IH (r = 0.8721, P = 0.0022). The results indicated that the correlation was not always higher or more significant for SH with heterosis than it was for IH or GH with heterosis, and it might be because of the reciprocal cancellation of the positive effect and negative effect of QTL linked to the significant marker loci.关键词
pig/heterosis/microsatellite marker/individual heterozygosityKey words
pig/heterosis/microsatellite marker/individual heterozygosity分类
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ZHANG Jing-hu,XIONG Yuan-zhu,DENG Chang-yan,JIANG Si-wen,LEI Ming-gang,LI Jia-lian,LI Feng-e,ZHENG Rong..Correlation of Individual Heterozygosity of Microsatellite Marker Loci with Heterosis of Growth Traits in Pig Populations[J].中国农业科学（英文版）,2006,5(8):635-642,8.基金项目
We wish to thank the USDA-MARC for providing the microsatellite primers. This study was supported by grant from the National 973 Project of China (G2000016105), National High Technology Development Project (2002AA211041), and the National Natural Science Foundation of China (30500358). （G2000016105）
