大白猪生长性状影响因素分析及遗传参数估计

doi:10.16431/j.cnki.1671-7236.2024.01.020

Abstract

Abstract: 【Objective】 The aim of this study was to analyze the fixed effects such as birth weight, teat number, herd, parity, the year of birth and birth season on the growth traits of Yorkshire pigs, and evaluate the genetic parameters, so as to provide references for the subsequent genetic improvement of this population.【Method】 Growth assay data were collected from 1 024 French Yorkshire sows, the main growth traits included average daily gain to 100 kg (ADG), age at 100 kg live weight (AGE), backfat adjusted to 100 kg (BF), and loin muscle area adjusted to 100 kg (LMA).General linear model was used to analyze fixed effects on the growth traits in Yorkshire pigs.Variance components and heritability of the growth traits were estimated by single-trait animal model in DMU software, and used multi-trait animal model to estimate the genetic correlation and phenotypic correlation.【Result】 The population mean of ADG, AGE, BF and LMA in Yorkshire pigs were 590.26 g, 168.20 d, 9.46 mm and 33.29 cm².AGE (P=0.057) and LMA (P=0.106) complied with the normality test, ADG and BF displayed approximately normal distributions.The herd, year of birth and birth season had significant effect on each growth trait in Yorkshire pigs (P<0.05 or P<0.01), the parity and birth weight had significant effect on AGE and ADG in Yorkshire pigs (P<0.05 or P<0.01).The heritability of growth traits in Yorkshire pigs ranged from 0.277 to 0.422, which were moderate to high heritability trait.The genetic correlation coefficient of each growth trait in Yorkshire pigs ranged from-0.996 to 0.346.【Conclusion】 Herd, year of birth, birth season, parity and birth weight had a significant impact on multiple growth traits in Yorkshire pigs, and the heritability of growth traits and the genetic correlation between traits could provide some guidance for the subsequent breeding of Yorkshire pig population.

Key words: Yorkshire pigs; growth trait; fixed effect; genetic parameter

CLC Number:

S813.3

XU Di, YAN Gang, ZHANG Shuai, ZHANG Kun, JIANG Shan, XING Tianqi, WANG Yubin, WANG Mengying, LAN Ganqiu, LIANG Jing. Influencing Factors Analysis and Genetic Parameters Estimation of Growth Traits in Yorkshire Pigs[J]. China Animal Husbandry and Veterinary Medicine, 2024, 51(1): 193-202.

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Influencing Factors Analysis and Genetic Parameters Estimation of Growth Traits in Yorkshire Pigs

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