Estimation of genetic parameters and the effect of inbreeding on dairy traits in Istrian sheep

Špehar, Marija; Ramljak, Jelena; Kasap, Ante

doi:10.1080/1828051x.2022.2031320

Cited by 4 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To date, the use of pedigree for estimating the genetic parameter of quantitative traits has been widely used in various studies ( Sasaki et al, 2006 ; Hoque et al, 2009 ; Takeda et al, 2018 ). However, the accuracy and completeness of the population information are debatable, which may lead to a biased estimate of the genetic components ( Wainschtein et al, 2021 ; Zoda et al, 2022 ; Špehar et al, 2022 ). The estimated heritability based on pedigree information, because of gene-environment interaction, may be overestimated ( Yang et al, 2015 ; Zhu and Zhou, 2020 ).…”

Section: Resultsmentioning

confidence: 99%

Genomic heritability and correlation between carcass traits in Japanese Black cattle evaluated under different ceilings of relatedness among individuals

Mahdabi

Tian

et al. 2023

Front. Genet.

View full text Add to dashboard Cite

The investigation of carcass traits to produce meat with high efficiency has been in focus on Japanese Black cattle since 1972. To implement a successful breeding program in carcass production, a comprehensive understanding of genetic characteristics and relationships between the traits is of paramount importance. In this study, genomic heritability and genomic correlation between carcass traits, including carcass weight (CW), rib eye area (REA), rib thickness (RT), subcutaneous fat thickness (SFT), yield rate (YI), and beef marbling score (BMS) were estimated using the genomic data of 9,850 Japanese Black cattle (4,142 heifers and 5,708 steers). In addition, we investigated the effect of genetic relatedness degree on the estimation of genetic parameters of carcass traits in sub-populations created based on different GRM-cutoff values. Genome-based restricted maximum likelihood (GREML) analysis was applied to estimate genetic parameters. Using all animal data, the heritability values for carcass traits were estimated as moderate to relatively high magnitude, ranging from 0.338 to 0.509 with standard errors, ranging from 0.014 to 0.015. The genetic correlations were obtained low and negative between SFT and REA [−0.198 (0.034)] and between SFT and BMS [−0.096 (0.033)] traits, and high and negative between SFT and YI [−0.634 (0.022)]. REA trait was genetically highly correlated with YI and BMS [0.811 (0.012) and 0.625 (0.022), respectively]. In sub-populations created based on the genetic-relatedness ceiling, the heritability estimates ranged from 0.212 (0.131) to 0.647 (0.066). At the genetic-relatedness ceiling of 0.15, the correlation values between most traits with low genomic correlation were overestimated while the correlations between the traits with relatively moderate to high correlations, ranging from 0.380 to 0.811, were underestimated. The values were steady at the ceilings of 0.30–0.95 (sample size of 5,443–9,850) for most of the highly correlated traits. The results demonstrated that there is considerable genetic variation and also favorable genomic correlations between carcass traits. Therefore, the genetic improvement for the traits can be simultaneously attained through genomic selection. In addition, we observed that depending on the degree of relationship between individuals and sample size, the genomic heritability and correlation estimates for carcass traits may be different.

show abstract

Section: Resultsmentioning

confidence: 99%

Genomic heritability and correlation between carcass traits in Japanese Black cattle evaluated under different ceilings of relatedness among individuals

Mahdabi

Tian

et al. 2023

Front. Genet.

View full text Add to dashboard Cite

show abstract

“…The genetic study of native Croatian breeds started with βlactoglobulin polymorphisms in Pag Island Sheep (Cubric-Curik et al, 2002). Since then, scientists have studied genetic diversity (Feligini et al, 2005;Ivanković et al, 2005;Cubric-Curik et al, 2009;Kasap et al, 2021;Špehar et al, 2022) and population structure (Lawson Handley et al, 2007;Ćinkulov et al, 2007;Ferencakovic et al, 2012;Salamon et al, 2014) of native Croatian sheep breeds using different approaches. Recently, 50 K SNP markers (Ciani et al, 2020) and whole-genome sequences (Deng et al, 2020;Lv et al, 2021) have been used in population genetic studies presenting native Croatian breeds, but with a very small number of animals per breed.…”

Section: Introductionmentioning

confidence: 99%

High-Density Genomic Characterization of Native Croatian Sheep Breeds

et al. 2022

View full text Add to dashboard Cite

A recent comprehensive genomic analysis based on 50K SNP profiles has shown that the regional Balkan sheep populations have considerable genetic overlap but are distinctly different from surrounding breeds. All eight Croatian sheep breeds were represented by a small number of individuals per breed. Here, we genotyped 220 individuals representing the native Croatian sheep breeds (Istrian Sheep, Krk Island Sheep, Cres Island Sheep, Rab Island Sheep, Lika Pramenka, Pag Island Sheep, Dalmatian Pramenka, Dubrovnik Sheep) and mouflon using the Ovine Infinium® HD SNP BeadChip (606,006 SNPs). In addition, we included publicly available Balkan Pramenka and other Mediterranean sheep breeds. Our analyses revealed the complex population structure of Croatian sheep breeds and their origin and geographic barriers (island versus mainland). Migration patterns confirmed the historical establishment of breeds and the pathways of gene flow. Inbreeding coefficients (FROH>2 Mb) between sheep populations ranged from 0.025 to 0.070, with lower inbreeding coefficients observed in Dalmatian Pramenka and Pag Island Sheep and higher inbreeding in Dubrovnik sheep. The estimated effective population size ranged from 61 to 1039 for Krk Island Sheep and Dalmatian Pramenka, respectively. Higher inbreeding levels and lower effective population size indicate the need for improved conservation management to maintain genetic diversity in some breeds. Our results will contribute to breeding and conservation strategies of native Croatian sheep breeds.

show abstract

Pedigree-based analysis of population structure and genetic diversity in high-milch Vrindavani crossbred cattle of India

Gangwar,

Ahmad,

Gaur

et al. 2024

Trop Anim Health Prod

View full text Add to dashboard Cite

Estimation of genetic parameters and the effect of inbreeding on dairy traits in Istrian sheep

Cited by 4 publications

References 52 publications

Genomic heritability and correlation between carcass traits in Japanese Black cattle evaluated under different ceilings of relatedness among individuals

Genomic heritability and correlation between carcass traits in Japanese Black cattle evaluated under different ceilings of relatedness among individuals

High-Density Genomic Characterization of Native Croatian Sheep Breeds

Pedigree-based analysis of population structure and genetic diversity in high-milch Vrindavani crossbred cattle of India

Contact Info

Product

Resources

About