Genetic parameters and trends for production and reproduction traits of a Landrace herd in China

Zhang, Zhe; Zhang, Hao; Pan, Rongyang; Wu, Lili; Li, Yalan; Chen, Zanmou; Cai, Guangyan; Li, Jiaqi; Wu, Zhenfang

doi:10.1016/s2095-3119(15)61105-4

Cited by 15 publications

(7 citation statements)

References 27 publications

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“…Reliable estimates of genetics parameters are essential in breeding programs as they lead to efficient pork production (Chimonyo et al, 2006;Zhang et al, 2016). During selection, not only a trait value is selected but an animal as a whole is considered.…”

Section: A N U S C R I P T Introductionmentioning

confidence: 99%

Genetic parameters for reproductive, longevity and lifetime production traits in Bísaro pigs

et al. 2019

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Highlights Bísaro pig have modest reproductive values  Heritabilities for litter size traits were low but the genetic variability was high  Longevity and lifetime production traits were strongly related between  Genetic trends showed no major changes during the last two decades  Selecting for litter size traits should focus on number of piglets born alive ACCEPTED MANUSCRIPT AbstractThe Bísaro pig has gained popularity in recent years reflecting the success of the conservation program. Nevertheless, no data is available for animal genetic evaluation in this breed. Therefore, this study aimed to estimate genetic parameters and trends for reproduction related traits in Bísaro pigs. Through a restricted maximum likelihood procedure applied to mixed linear models, 27,844 farrowing records, from 1995 to 2017, were used to analyse total number of pigs born per litter (NBT), number of pigs born alive (NBA), number of stillborn (NSB), number of pigs weaned per litter (NBW), age at first farrowing (AFF), farrowing interval (FIT), length of productive life (LPL), lifetime number of litters (LNL), lifetime pig production (LTP) and lifetime efficiency (LTP365). The heritability estimates for litter size traits were low and ranged from 0.007±0.004 to 0.015±0.006. Differently, the heritabilities for traits related to longevity and lifetime production traits were higher (0.078±0.026 to 0.121±0.030). AFF registered the highest heritability value (0.345±0.028). ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P TNSB and FIT presented high values of additive genetic coefficient of variation (0.177 and 0.271) in contrast with low heritability estimates (0.007±0.004 and 0.002±0.005). Very tight genetic correlations were found between NBT and NBA (0.968), NBW and NBT (0.974), and NBW and NBA (0.945). Weak genetic correlations were found between both NBT and NSB (0.352) and between NBA and NSB (0.107). Longevity and lifetime production traits presented high positive genetic correlations (0.811-0.969) and moderate to high phenotypic correlations (0.266-0.946). No major genetic changes were registered over time for most of the analysed traits, except for AFF and LPL, having registered an overall decreased of mean estimated breeding values (21.3 and 17.5) and negative genetic trends of -0.6 and -0.4 (P<0.001), respectively.

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Section: A N U S C R I P T Introductionmentioning

confidence: 99%

Genetic parameters for reproductive, longevity and lifetime production traits in Bísaro pigs

et al. 2019

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“…However, the genetic progress for litter traits in this study was much lower as compared with some pig populations selected in China or Thailand. For instance, a study on 6,363 sows in Chinese Landrace pigs during 2000 to 2012 reported an annual genetic gain of 0.08 piglets per litter per year for NBA [ 29 ]. Another study of total 3,109 Landrace and Yorkshire sows in Northern Thailand indicated that genetic trends were positive and significant for all traits during 1989 and 2013, that is, 0.16 for NBA, 0.12 for NW, and 1.23 for LWW [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Genetic parameters and litter trait trends of Danish pigs in South Vietnam

2021

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The objective of this study was to estimate the genetic parameters and various litter trait trends of Danish pigs in South Vietnam, including the number born alive (NBA), number weaned (NW), and litter weight at the 21 st day (LW21).Methods: Records of 936 Yorkshire sows with 3361 litters and 973 Landrace sows with 3161 litters were used to estimate the variance components, genetic parameters, and trends of NBA, NW, and LW21. The restricted maximum likelihood method was applied using VCE6 software to obtain the variance components and genetic parameters. Thereafter, the best linear unbiased prediction procedure with an animal model was applied using PEST software to estimate the breeding values of the studied traits. Results:The heritability estimates were low, ranging from 0.12 to 0.21 for NBA, 0.03 to 0.04 for NW, and from 0.11 to 0.13 for LW21. The genetic correlation between the NBA and NW was relatively strong in both breeds, at 0.77 and 0.60 for Yorkshire and Landrace, respectively.Similarly, the genetic correlation between the NW and LW21 was considerably stronger in Landrace pigs (0.71) than in Yorkshire pigs (0.48). The estimates of annual genetic progress were 0.0431, 0.0233, and 0.0461 for NBA, NW, and LW21 in Landrace pigs and 0434, 0.0202, and 0.0667 for NBA, NW, and LW21 in Yorkshire pigs, respectively. Conclusion:The positive genetic trends estimated for the additive genetic values of the selected traits indicated that the current breeding system has achieved favorable results.

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“…Because the ADG and D100 or D115 traits measure similar (although not identical) growth stage periods, it is expected that some significant SNPs will associate with more than one trait [ 34 ], while each trait will be associated uniquely with specific SNPs. Our results agree, in part, with previous QTL mapping and GWA studies.…”

Section: Discussionmentioning

confidence: 99%

Identification of growth trait related genes in a Yorkshire purebred pig population by genome wide association studies

Meng¹,

Wang

Zhou³

et al. 2016

Asian-Australas J Anim Sci

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ObjectiveThe aim of this study is to identify genomic regions or genes controlling growth traits in pigs.MethodsUsing a panel of 54,148 single nucleotide polymorphisms (SNPs), we performed a genome-wide Association (GWA) study in 562 pure Yorshire pigs with four growth traits: average daily gain from 30 kg to 100 kg or 115 kg, and days to 100 kg or 115 kg. Fixed and random model Circulating Probability Unification method was used to identify the associations between 54,148 SNPs and these four traits. SNP annotations were performed through the Sus scrofa data set from Ensembl. Bioinformatics analysis, including gene ontology analysis, pathway analysis and network analysis, was used to identify the candidate genes.ResultsWe detected 6 significant and 12 suggestive SNPs, and identified 9 candidate genes in close proximity to them (suppressor of glucose by autophagy [SOGA1], R-Spondin 2 [RSPO2], mitogen activated protein kinase kinase 6 [MAP2K6], phospholipase C beta 1 [PLCB1], rho GTPASE activating protein 24 [ARHGAP24], cytoplasmic polyadenylation element binding protein 4 [CPEB4], GLI family zinc finger 2 [GLI2], neuronal tyrosine-phosphorylated phosphoinositide-3-kinase adaptor 2 [NYAP2], and zinc finger protein multitype 2 [ZFPM2]). Gene ontology analysis and literature mining indicated that the candidate genes are involved in bone, muscle, fat, and lung development. Pathway analysis revealed that PLCB1 and MAP2K6 participate in the gonadotropin signaling pathway and suggests that these two genes contribute to growth at the onset of puberty.ConclusionOur results provide new clues for understanding the genetic mechanisms underlying growth traits, and may help improve these traits in future breeding programs.

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Genetic parameters and trends for production and reproduction traits of a Landrace herd in China

Cited by 15 publications

References 27 publications

Genetic parameters for reproductive, longevity and lifetime production traits in Bísaro pigs

Genetic parameters for reproductive, longevity and lifetime production traits in Bísaro pigs

Genetic parameters and litter trait trends of Danish pigs in South Vietnam

Identification of growth trait related genes in a Yorkshire purebred pig population by genome wide association studies

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