大白猪生长、繁殖和体尺性状遗传参数估计

doi:10.11843/j.issn.0366-6964.2024.05.012

Abstract

Abstract: The aim of this study was to estimate the genetic parameters of growth, reproduction traits and body measurements of French Large White pigs, and provide a basis for the selection of target traits and the setting of weight coefficient of index model in breeding process. In this study, 8 751,12 762,7 407 records for growth trait, reproductive trait and body measurements were collected, respectively from a pig breeding farm in Heilongjiang Province from 2020 to 2023. DMU software was used for statistical analyses of all data. Genetic parameters was estimated by using animal models for the following traits: growth traits including the age (D100), average daily gain (DG100), backfat thickness (BF100), eye muscle area at 100 kg (LMA100), reproductive traits including total number born (TNB), number born alive (NBA), number healthy born (NHB), litter birth weight (LBW), body measurements including body length (BL), body height (BH) and tube circumference (CBC) in French Large White pigs. The results showed that the heritability estimates in French Large White pigs were 0.232, 0.220, 0.334 and 0.390 for growth traits (D100, DG100, BF100 and LMA100), respectively, which belonged to the medium heritability traits. The heritability estimates were 0.081, 0.065, 0.060, 0.090 for reproductive traits (TNB, NBA, NHB, LBW), respectively, all belonging to low heritability traits. The heritability estimates were 0.677, 0.877 and 0.227 for body measurements traits (BL, BH and CBC), respectively. BL and BH belonged to high heritability traits, while CBC belonged to medium heritability traits. The genetic and phenotypic correlations between D100 and DG100 in French Large White pigs were -0.999 and -0.994, respectively, showing strong negative correlations. There were positive genetic correlation and phenotypic correlation among reproductive traits, and the genetic and phenotypic correlation between NBA and NHB were the highest, which were 0.995 and 0.977, respectively. The genetic and phenotypic correlations among body size traits ranged from -0.345 to 0.246 and from -0.057 to 0.125, respectively. A negative but not high genetic and phenotypic correlation was estimated between BL and BH. The above results indicate that it is necessary to formulate a reasonable breeding program according to the different characteristics of the genetic parameters for above growth, reproductive traits and body measurements in breeding process. The estimated genetic parameters in French Large White pigs in this study could provide some reference for formulating breeding programs and improving breeding efficiency.

Key words: Large White pigs, growth traits, reproductive traits, body measurements, genetic parameter

CLC Number:

S828.2

KANG Jiawei, HUANG Xuankai, WANG Zhipeng, ZHANG Aizhen, MENG Fangrong, GAI Peng, BAO Junfu, SUN Kexin, SONG Shaokang, SUN Pan, CHEN Yichuan, ZHANG Lei, GAO Shengyue, CHANG Minghang. Estimation of Genetic Parameters for Growth, Reproduction, and Body Measurements Traits in Large White Pigs[J]. Acta Veterinaria et Zootechnica Sinica, 2024, 55(5): 1936-1944.

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Estimation of Genetic Parameters for Growth, Reproduction, and Body Measurements Traits in Large White Pigs

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