凤翔桂香鸡饲料转化率相关性状与部分体尺性状的遗传参数估计

doi:10.12160/j.issn.1672-5190.2024.06.006

摘要/Abstract

摘要： [目的] 估测凤翔桂香鸡F系公鸡的距长、胫长、胫围和饲料转化率相关性状的遗传参数,完善该品种的育种模型。[方法] 选取2批次70日龄凤翔桂香鸡F系公鸡2 205只,测定70日龄体重（BWG1）和112日龄体重（BWG2）,记录70~112日龄每天的喂料量和剩余料量,计算平均日采食量和饲料转化率;测定112日龄鸡距长（JJ）、胫长（JC）、胫围（JW）。运用SPSS软件和ASRmel软件中的REML算法,配合动物性状模型进行数据分析与遗传参数估计。[结果] 除JJ性状外,批次效应对凤翔桂香鸡F系公鸡的所有试验性状均有极显著（P<0.01）影响;JJ、JC、JW、BWG1、BWG2、ADG、ADFI、FCR遗传力分别为0.470 8、0.321 0、0.552 9、0.341 3、0.464 1、0.472 3、0.440 1、0.339 1,均属于中高遗传力性状;JJ的变异系数为0.27,在试验测定的所有性状中最高,表明该性状有较大的选育潜力。FCR与JC、JW、ADG、ADFI呈极显著（P<0.01）负遗传相关和负表型相关,而JJ与其他性状之间无显著（P>0.05）表型相关和遗传相关。[结论] 凤翔桂香鸡F系公鸡距长、胫长、胫围、70日龄体重、112日龄体重、日增重、平均日采食量及饲料转化率均为中等遗传力性状,性状主要受遗传效应影响。本研究估测的凤翔桂香鸡遗传参数,可作为群体遗传改良依据,提高育种工作效率。

关键词: 凤翔桂香鸡, 体尺性状, 饲料转化率, 遗传力, 遗传相关, 表型相关

Abstract: [Objective]This study was conducted to estimate the genetic parameters of feed conversion ratio （FCR）, spur length （JJ）, shank length （JC）, and shank circumference （JW） in Fengxiang Guixiang chicken F-line roosters, and to establish a breeding model for this breed. [Method] In this study, two batches of 2 205 male Fengxiang Guixiang chickens, aged 70 days, were selected for analysis. The body weight at 70 days of age （BWG1） and the body weight at 112 days of age （BWG2） were recorded. Daily feed intake and the amount of feed remaining from 70 to 112 days of age were monitored to calculate the average daily feed intake and feed conversion rate. Additionally, the JJ, JC, and JW metrics of the chickens at 112 days of age were determined. Data analysis and genetic parameter estimation were conducted using SPSS software and the REML algorithm within ASReml software, in conjunction with an animal trait model. [Result] Except for the JJ trait, the batch effect had an extremely significant （P<0.01） influence on all the tested traits of the F-line cocks of Fengxiang Guixiang chicken; the heritability of JJ, JC, JW, BWG1, BWG2, ADG, ADFI, and FCR were 0.470 8, 0.321 0, 0.552 9, 0.341 3, 0.464 1, 0.472 3, 0.440 1, and 0.339 1, respectively, all belonging to medium to high heritability traits; the coefficient of variation of JJ was 0.27, the highest among all the traits measured in the experiment, indicating that this trait has great breeding potential. FCR had extremely significant （P<0.01） negative genetic correlations and negative phenotypic correlations with JC, JW, ADG, and ADFI, while there were no significant （P>0.05） phenotypic correlations and genetic correlations between JJ and other traits. [Conclusion] The spur length, shank length, shank circumference, body weight at 70 days of age, body weight at 112 days of age, daily weight gain, average daily feed intake, and feed conversion ratio of male Fengxiang Guixiang chicken F line exhibit medium heritability. These traits are primarily influenced by genetic factors. The genetic parameters of Fengxiang Guixiang chicken estimated in this study can serve as a foundation for the genetic improvement of the population, thereby enhancing the efficiency of breeding efforts.

Key words: Fengxiang Guixiang chicken, cockspur, material to weight ratio, heritability, genetic correlation, phenotypic correlation

中图分类号:

S831.892

王亚平, 王嘉鸿, 蒋世远, 陈天伟, 李道劲. 凤翔桂香鸡饲料转化率相关性状与部分体尺性状的遗传参数估计[J]. 畜牧与饲料科学, 2024, 45(6): 36-41.

WANG Yaping, WANG Jiahong, JIANG Shiyuan, CHEN Tianwei, LI Daojin. Genetic Parameter Estimation of Feed Conversion and Body Size Traits of Fengxiang Guixiang Chickens[J]. Animal Husbandry and Feed Science, 2024, 45(6): 36-41.

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