| 摘要: |
| 为评估如皋黄鸡选育群个体间亲缘关系远近程度,分析105日龄体重遗传力。收集2011—2014年连续4代如皋黄鸡有称重记录的育成期母鸡资料,整理后得到7 550条个体记录。对非105日龄体重进行校正处理。应用 Endog软件计算近交相关参数,包括个体近交系数(Fi)、个体近交速率(ΔFi)、平均亲缘关系(AR)以及每个世代Fi和AR平均值。应用 AIREML 算法剖分表型方差组分,计算遗传力时考虑了近交、批次以及母本日龄对表型方差的影响,将加性遗传、母体遗传列入随机效应,以AIC值、BIC值选择最优模型。 结果表明选育群个体近交系数平均值为0.44%、亲缘关系平均值为1.58%;个体近交系数适合以3阶协变量嵌入遗传模型;如皋黄鸡105日龄体重遗传力为0.45±0.03。如皋黄鸡105日龄体重属于中等遗传力性状;分析体重遗传参数时应考虑个体近交系数。 |
| 关键词: 如皋黄鸡 遗传力 近交系数 体重 系谱 |
| DOI：10.11841/j.issn.1007-4333.2015.06.23 |
| 投稿时间：2015-02-06 |
| 基金项目:现代农业产业技术体系建设专项资金(CARS-41-K02); 国家科技支撑项目(2011BAD28B0303); 江苏省自然科学基金(BK20131237); 江苏省科技成果转化专项资金(BA2014132) |
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| Estimation on inbreeding parameters and heritability of 105 days-old body weight in Rugao Yellow Chickens |
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GUO Jun, WANG Ke-hua, QU Liang, SHEN Man-man, DOU Tao-cun, HU Yu-ping
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| (Jiangsu Institute of Poultry Science, Yangzhou 225125, China) |
| Abstract: |
| This study was to investigate the effect of inbreeding depression on juvenile body weight in Rugao Yellow Chickens and estimate the heritability for body weight at 105 days-old.Data was collected from Rugao Yellow Chickens for four generations from year 2011 to 2014 And body weights from 7 550 juvenile fowls were collected.Non-105 day-old body weights were standardized to 105 day-old body weights.Inbreeding parameters,such as individual inbreeding coefficients (Fi),individual inbreeding coefficients gain (ΔFi),average relatedness coefficient (AR),and average Fi and ΔFi by generation,were evaluated with Endog software.The variance components were dissected with AIREML algorithm.The effects of inbreeding depression,batches and dam age were considered during evaluation of heritability.Direct and maternal genetic variances were considered as random effects.Models were compared using AIC and BIC values.The results suggested:1) Average Fi value for the whole population was 0.44%,and AR value was 1.58%;2) Fi as 3rd order covariates should be embedded in genetic models;3) The heritability for 105 days-old body weight of Rugao Yellow chickens was 0.45±0.03,which was moderate heritability trait.Fi should be embedded in estimation on genetic parameters for body weight. |
| Key words: Rugao Yellow Chicken heritability inbreeding coefficient body weight pedigree |
