| 应用混合线性模型评估蛋白高度遗传参数 |
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| 引用本文： | 曲亮,郭军,王星果,胡玉萍,窦套存,王克华.应用混合线性模型评估蛋白高度遗传参数[J].安徽农业大学学报,2018,45(2):238-241. |
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| 作者姓名： | 曲亮 郭军 王星果 胡玉萍 窦套存 王克华 |
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| 作者单位： | 江苏省家禽科学研究所,扬州,225125;江苏省家禽科学研究所,扬州,225125;江苏省家禽科学研究所,扬州,225125;江苏省家禽科学研究所,扬州,225125;江苏省家禽科学研究所,扬州,225125;江苏省家禽科学研究所,扬州,225125 |
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| 基金项目： | 现代农业产业技术体系建设专项(CARS-40-K01)，江苏省农业科技自主创新项目(CX(16)1008) |
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| 摘 要： | 为分析蛋白高度动态变化规律,估计该性状不同周龄的遗传力和遗传相关系数,以高产蛋鸡白来航鸡与地方鸡鸡种绿壳蛋鸡构建F2资源群体,采集资源群体蛋白高度数据18 624条,应用约束最大似然算法分析表型方差组分。结果表明,混合线性模型的固定效应宜包含批次和亲代品种效应;资源群体蛋白高度遗传力为0.17~0.30;不同周龄蛋白高度表型相关系数为0.22~0.43,遗传相关系数为0.58~0.97,相邻周龄遗传相关系数较高。结果显示资源群体蛋白高度遗传力属于中等偏下,通过中长期选择才能有效获取遗传进展;蛋鸡分离群体蛋白高度不同周龄之间表型值差异不大、遗传相关系数较高,选择1~2个时间点足以代表全期蛋白高度水平。
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| 关 键 词： | 蛋白高度 多性状动物模型 遗传力 遗传相关 REML |
| 收稿时间： | 2017/7/27 0:00:00 |
Genetic parameters for the albumen height estimated by mixed linear model approaches |
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| QU Liang,GUO Jun,WANG Xingguo,HU Yuping,DOU Taocun and WANG Kehua.Genetic parameters for the albumen height estimated by mixed linear model approaches[J].Journal of Anhui Agricultural University,2018,45(2):238-241. |
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| Authors: | QU Liang GUO Jun WANG Xingguo HU Yuping DOU Taocun and WANG Kehua |
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| Institution: | Jiangsu Institute of Poultry Science, Yangzhou 225125,Jiangsu Institute of Poultry Science, Yangzhou 225125,Jiangsu Institute of Poultry Science, Yangzhou 225125,Jiangsu Institute of Poultry Science, Yangzhou 225125,Jiangsu Institute of Poultry Science, Yangzhou 225125 and Jiangsu Institute of Poultry Science, Yangzhou 225125 |
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| Abstract: | This study was to depict the dynamic changes of the albumen height, and dissect the variance components along weeks. The data set composed of 18 624 items collected from the resource population, which was set up by White leghorn reciprocal crossing with the blue eggshell chickens. Variance components (Co) were estimated with the mixed linear model. Results suggested: factors of batches and breeds should be included in the fix effects; for the resource population, the heritability on albumen height varied from 0.17 to 0.30, the phenotypic correlation among test weeks ranged from 0.22 to 0.43, the genetic correlation ranged from 0.58 to 0.97, and the correlation of neighbor test weeks was high. In conclusion, since the heritability on albumen height was low to moderate, the middle- or long-term selection was recommended to obtain genetic gains. Considering high genetic correlations in test weeks, it would be recommened that a single week record is sufficient to describe the genetic merit of an individual. |
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| Keywords: | albumen height multivariate model heritability genetic correlation REML |
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