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Journal articles on the topic 'Trait heritability'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Sari, Eka Meutia, Mohd Agus Nashri Abdullah, and Cut Hasnani. "Estimasi Nilai Heritabilitas Sifat Kuantitatif Sapi Aceh." Jurnal Agripet 16, no. 1 (2016): 37. http://dx.doi.org/10.17969/agripet.v16i1.3530.

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ABSTRAK. Tujuan penelitian ini untuk mengestimasi nilai heritabilitas sifat kuantitatif pada sapi Aceh. Penelitian ini dilaksanakan di Balai Pembibitan Ternak Unggul (BPTU) Indrapuri Aceh Besar, dengan menggunakan metode survey (data primer dan data sekunder), dan analisis data menggunakan Rancangan Acak Lengkap Pola Searah. Parameter yang diamati dalam penelitian ini adalah nilai heritabilitas sifat kuantitatif meliputi panjang badan, tinggi gumba, lingkar dada, bobot lahir dan bobot sapih. Nilai heritabilitas bobot lahir 0,06 ± 0,29, bobot setahun 0,12 ± 0,32, bobot satu setengah tahun 0,37

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2

Tang, Xi, Shijun Xiao, Nengshui Ding, Zhiyan Zhang, and Lusheng Huang. "Comparative Study of Single-Trait and Multi-Trait Genomic Prediction Models." Animals 14, no. 20 (2024): 2961. http://dx.doi.org/10.3390/ani14202961.

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Conventional genomic selection models trait individually, neglecting complex trait interactions. Multi-trait models address this by considering genetic correlations, thus improving breeding value accuracy. Despite their theoretical benefits, quantifying these models’ breeding advantages across genetic backgrounds is essential. This study evaluates the benefits of multi-trait models under varying population sizes and three levels of genetic correlations (low, medium, high) using simulations based on 50 K chip data from 5000 individuals. In equal heritability scenarios, the multi-trait GBLUP mod

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Krupa, Emil, Zuzana Krupová, Eliška Žáková, Jiří Bauer, Nina Moravčíková, and Irena Vrtková. "An Assessment of the Genetic Parameters of Boars’ Reproductive Traits." Genes 14, no. 11 (2023): 2003. http://dx.doi.org/10.3390/genes14112003.

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The aim of this study was to estimate genetic parameters for the reproductive traits of boars based on single-nucleotide polymorphism data. A total of 109,836 semen samples from 2249 boars were collected between 2010 and 2022. Five basic traits were assessed: sperm volume, sperm concentration, motility, number of abnormal sperm, and, for the first time for the local population, libido. In addition, two derived traits were assessed: total sperm count and number of functional sperm. Genetic parameters were estimated using the single-step genomic best linear unbiased prediction method (ssGBLUP).

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Zhang, Shiwei, Jie Kong, Jian Tan, et al. "Multi-Trait Genomic Prediction of Meat Yield in Pacific Whiteleg Shrimp (Penaeus vannamei)." Animals 15, no. 8 (2025): 1165. https://doi.org/10.3390/ani15081165.

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The meat yield (MY) is a key economic trait in Pacific whiteleg shrimp (Penaeus vannamei) breeding, necessitating accurate genomic prediction for efficient genetic improvement. In this study, we investigated single-trait (STGMs) and multi-trait genomic models (MTGMs) for predicting MY and related traits, using two cross-validation strategies reflecting different data-availability scenarios. A total of 899 individuals from 63 full-sibling families were phenotyped for MY, net meat weight (MW), body weight (BW), body length (BL), and abdominal segment length (AL). We estimated the genomic heritab

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Velden, Manfred. "The heritability of mental traits in humans: A proposal for a more coherent discussion." Swiss Journal of Psychology 62, no. 1 (2003): 5–10. http://dx.doi.org/10.1024//1421-0185.62.1.5.

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It is proposed to simplify the debate about the heritability of mental traits in humans by concentrating on two crucial issues: Population specificity of heritability estimates and the relation of these estimates to the malleability of the trait to which they refer. It is demonstrated that due to vast differences between the environmental variations of populations there would have to be a heritability estimate for every imaginable population, and that a heritability estimate allows no predictions whatsoever about the malleability of the trait in question. It is therefore concluded that this fi

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Xiang, Ruidong, Irene van den Berg, Iona M. MacLeod, et al. "Quantifying the contribution of sequence variants with regulatory and evolutionary significance to 34 bovine complex traits." Proceedings of the National Academy of Sciences 116, no. 39 (2019): 19398–408. http://dx.doi.org/10.1073/pnas.1904159116.

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Many genome variants shaping mammalian phenotype are hypothesized to regulate gene transcription and/or to be under selection. However, most of the evidence to support this hypothesis comes from human studies. Systematic evidence for regulatory and evolutionary signals contributing to complex traits in a different mammalian model is needed. Sequence variants associated with gene expression (expression quantitative trait loci [eQTLs]) and concentration of metabolites (metabolic quantitative trait loci [mQTLs]) and under histone-modification marks in several tissues were discovered from multiomi

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Rodrigues, Francelino Neiva, José Lindenberg Rocha Sarmento, Tânia Maria Leal, Adriana Mello de Araújo, and Luiz Antonio Silva Figueiredo Filho. "Genetic parameters for worm resistance in Santa Inês sheep using the Bayesian animal model." Animal Bioscience 34, no. 2 (2021): 185–91. http://dx.doi.org/10.5713/ajas.19.0634.

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Objective: The objective of this study was to estimate the genetic parameters for worm resistance (WR) and associated characteristics, using the linear-threshold animal model via Bayesian inference in single- and multiple-trait analyses.Methods: Data were collected from a herd of Santa Inês breed sheep. All information was collected with animals submitted to natural contamination conditions. All data (number of eggs per gram of feces [FEC], Famacha score [FS], body condition score [BCS], and hematocrit [HCT]) were collected on the same day. The animals were weighed individually on the day afte

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8

Lykken, David T. "A More Accurate Estimate of Heritability." Twin Research and Human Genetics 10, no. 1 (2007): 168–73. http://dx.doi.org/10.1375/twin.10.1.168.

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AbstractAll psychological and psychophysiological traits vary, often widely, about their stable set-point values, due to transitory environmental influences. Because it is this stable set-point that embodies the genetically determined component of the trait, twin and family data based on one-time trait measurements must underestimate true trait heritability. The means of multiple measurements, taken months or years apart, then correlated within pairs of monozygotic twins, would yield an accurate estimate of the broad heritability of the set-point value, but such data are rare and expensive. Gi

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Gamma, Alex, and Michael Liebrenz. "Rethinking heritability." F1000Research 8 (September 30, 2019): 1705. http://dx.doi.org/10.12688/f1000research.20641.1.

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Two markedly different concepts of heritability co-exist in the social and life sciences. Behavioral genetics has popularized a highly technical, quantitative concept: heritability as the proportion of genetic variance relative to the total phenotypic variance of a trait in a population. At the same time, a more common biological notion simply refers to the transmission of phenotypic traits across generations via the transmission of genes. It is argued here that the behavioral-genetic concept is of little use overall, while the common biological concept is overly narrow and implies a false vie

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Lopez, Bryan Irvine, Ju-Hwan Son, Kangseok Seo, and Dajeong Lim. "Estimation of Genetic Parameters for Reproductive Traits in Hanwoo (Korean Cattle)." Animals 9, no. 10 (2019): 715. http://dx.doi.org/10.3390/ani9100715.

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Genetic parameters for the reproductive traits of Hanwoo cattle were estimated using data obtained from 15,355 cows in 92 herds across South Korea, which were inseminated from May 1997 to July 2016. An “average information” restricted maximum likelihood (REML) procedure that fit in single-trait and multi-trait animal models was used to estimate the variance components of age at first calving (AFC), calving interval (CI), days open (DO), and gestation length (GL). Results showed the low estimates of heritability for all reproductive traits from both single-trait and multi-trait models. Estimate

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Zamani-Dahaj, Seyed Alireza, Anthony Burnetti, Thomas C. Day, Peter J. Yunker, William C. Ratcliff, and Matthew D. Herron. "Spontaneous Emergence of Multicellular Heritability." Genes 14, no. 8 (2023): 1635. http://dx.doi.org/10.3390/genes14081635.

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The major transitions in evolution include events and processes that result in the emergence of new levels of biological individuality. For collectives to undergo Darwinian evolution, their traits must be heritable, but the emergence of higher-level heritability is poorly understood and has long been considered a stumbling block for nascent evolutionary transitions. Using analytical models, synthetic biology, and biologically-informed simulations, we explored the emergence of trait heritability during the evolution of multicellularity. Prior work on the evolution of multicellularity has assert

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Meuwissen, T. H. E., and J. A. Woolliams. "Responses of multi-trait selection in open nucleus schemes for dairy cattle breeding." Animal Science 56, no. 3 (1993): 293–99. http://dx.doi.org/10.1017/s0003356100006322.

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AbstractResponses of selection for milk production and secondary traits were predicted in open nucleus schemes using a deterministic model. Secondary traits considered were: traits recorded during lactation (e.g. mastitis resistance; calving ease); traits recorded in the nucleus only (e.g. food intake); traits recorded early in life (e.g. growth rate); and traits recorded late in life (e.g. longevity). Also, genotype × environment interactions between nucleus and commercial herds and predictors of merit in juveniles were considered.Extension of the breeding goal to include an uncorrelated seco

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RATWAN, POONAM, MANOJ KUMAR, ANSHUMAN KUMAR, A. K. CHAKRAVARTY, and AJOY MANDAL. "Impact of additive direct and maternal heritability on production efficiency traits in Jersey crossbred cattle." Indian Journal of Animal Sciences 88, no. 7 (2018): 848–52. http://dx.doi.org/10.56093/ijans.v88i7.81480.

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Variance components, direct and maternal heritability were estimated for milk production efficiency traits namely, milk yield per day of lactation length (MY/LL) and milk yield per day of calving interval (MY/CI) in Jersey crossbreds maintained at Eastern Regional Station of ICAR-National Dairy Research Institute, West Bengal (India). Data analyses were done using restricted maximum likelihood (REML) method with six alternative animal models (direct and including or excluding maternal associated effects). The best model was chosen after testing the improvement of the log-likelihood values and

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Yang, Xiyan, Jingkun Nie, Yaxuan Zhang, et al. "Genome-Wide Association Analysis of Boar Semen Traits Based on Computer-Assisted Semen Analysis and Flow Cytometry." Animals 15, no. 1 (2024): 26. https://doi.org/10.3390/ani15010026.

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Semen quality and persistence are critical for evaluating the usability of individual boars in AI, a standard practice in pig breeding. We conducted GWASs on various semen traits of Duroc boars, including MOT, DEN, ABN, MMP, AIR, and ROS levels. These traits were assessed using FCM and CASA. A total of 1183 Duroc boars were genotyped using the GeneSeek GGP Porcine 50 K SNP BeadChip. The GWAS was performed using three different models: GLM, MLM, and FarmCPU. Additionally, trait heritability was estimated using single- and multiple-trait PBLUP models, yielding 0.19, 0.29, 0.13, 0.18, 0.11, and 0

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MAZZA, Serena, and Roberto MANTOVANI. "Heritability of linear type traits in the autochthonous Rendena dual purpose breed." Acta agriculturae Slovenica. Suplement, no. 3 (September 18, 2012): 161–65. http://dx.doi.org/10.14720/aas-s.2012.3.19102.

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The aim of the study was to estimate heritabilities (h2) of type traits and linear description scores in Rendena breed. Five traditional summary traits and 20 linear descriptions were recorded on 9,776 Rendena primiparous cows. All available pedigree information (16,234 animals) was used to set up the relationship matrix among animals. Data were analyzed using a single-trait animal model, accounting for the following effects: herd-year-classifier, days in milk, age at first calving, and the genetic additive cow effect. The most heritable trait was the stature (h2 = 0.53), whereas the lowest va

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Hamza, A.M., S.G. Ado, I.S. Usman, C.D. Ataga, J.O. Odewale, and Collins Agho. "Heritability Estimate for Fruit Traits in Date Palm Crosses (Phoenix dactylifera L)." Greener Journal of Agricultural Sciences 3, no. 7 (2013): 557–62. https://doi.org/10.15580/GJAS.2013.3.061013662.

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Date palm progress derived from 60 crosses replicated twice, subjected to analysis of variance using nested design for the purpose of estimating fulsibs, broad sense and narrow sense heritability’s, genetic advance and genetic advance as percentage mean for the eight fruit traits. Positive estimates were recorded for fulsibs heritability for the traits. Broad sense heritability for the traits was high. Narrow sense estimates were low and negative indicating that the estimates were not different from zero or they were very small. Heritability indicates the effectiveness with which selecti

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Ray, Dennis T., Maren Elizabeth Veatch-Blohm, Valerie Hunter Teetor, and Bruce Walsh. "Upper and Lower Heritability Estimates in Guayule Based on Mode of Reproduction." Journal of the American Society for Horticultural Science 132, no. 2 (2007): 213–18. http://dx.doi.org/10.21273/jashs.132.2.213.

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Guayule (Parthenium argentatum Gray) has been difficult to improve through classical plant breeding because of its facultative apomictic reproductive system and long growth period to harvest (2–5 years). Attempts have been made to increase rubber concentration and yield by selecting for traits correlated with rubber production. The objective of this study was to estimate heritability values in guayule that more accurately account for the contributions of apomictic and sexual reproduction occurring among populations, using a modified parent–progeny regression. Heritability was calculated using

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Subhashini, S. "Variability studies in F2 population of upland cotton (Gossypium hirsutum L.) for quantitative and qualitative traits." YMER Digital 21, no. 08 (2022): 326–34. http://dx.doi.org/10.37896/ymer21.08/28.

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The present investigation on F2 population of TCH 1828 X GTHV 15-34, CO 14 X GISV 323, CO 14 X RHC 1409 and CO 17 X KC 3 were used for the variability studies thereby identifying the phenotypic (PCV), genotypic variations (GCV), heritability (h2) and genetic advance as percent of mean (GAM) present in the population. Heritability and genetic advance are crucial selection criteria. Heritability estimates combined with genetic advance are usually more accurate in forecasting gain under selection than heritability estimates. Seed cotton yield per plant was observed to have additive gene action, h

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Nguyen, Sang V. "Genetic parameter estimates for important traits on the fifth generation in red tilapia in Vietnam." Journal of Agriculture and Development 20, no. 1 (2021): 49–57. http://dx.doi.org/10.52997/jad.7.01.2021.

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Genetic parameters comprising heritability, genetic correlation and genotype by environment interaction (GxE) for growth survival rate and body colour at harvest were estimated on the 5th selective generation of red tilapia grown in two environments, freshwater and brackishwater ponds. A total of 116 full-half-sib families was produced as well as 4,432 and 3,811 tagged individuals were tested in freshwater and brackishwater ponds, respectively. Genetic parameters were estimated by ASReml 4.1 software. The heritability for body weight and survival rate was high while medium heritability for bod

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Dudi, N. Hilmia Dedi Rahmat. "EVALUASI BOBOT LAHIR DAN NILAI HERITABILITASNYA PADA SAPI BALI DI BPTU HPT PULUKAN BALI (Evaluated Means of Birth Weight and it’s Heritability Value in Bali Cattle at BPTU HMT Denpasar Bali)." JANHUS: Jurnal Ilmu Peternakan Journal of Animal Husbandry Science 2, no. 1 (2018): 13. http://dx.doi.org/10.52434/janhus.v2i1.257.

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Abstrak  Bobot lahir merupakan parameter awal di dalam mengidentifikasi produktivitas seekor ternak dan pendugaan nilai heritabilitas suatu sifat merupakan parameter genetik yang penting didalm melakukan seleksi berdasarkan sifat tersebut. Penelitian ini bertujuan untuk mengevaluasi bobot lahir dan nilai heritabilitasnya pada sapi Bali di BPTU HMT Denpasar yang dapat digunakan sebagai dasar seleksi bibit berdasarkan bobot lahir. Peneilitian ini menggunakan 100 data bobot lahir sapi Bali, yang diperoleh dari 58 ekor sapi betina dan 42 ekor sapi jantan, sedangkan pendugaan heritabili

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Marinkovic, Radovan, Ana Marjanovic-Jeromela, and Dragana Vasic. "Genetic variability components of some quantitative traits of winter oilseed rape - Brassica napus L." Genetika 35, no. 3 (2003): 199–205. http://dx.doi.org/10.2298/gensr0303199m.

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Analysis of genetic variance components for number of leaves and branches per plant and stem diameter was done according to the method of HAYMAN (1954). Heritability in narrow (h2a) and broad (h2b) sense was determined for the same traits, using the method of Mather and Jinks (1971). Non-additive component of genetic variance was greater than additive component in all three studied traits. Dominant and recessive genes were not equally distributed in parent genotypes, with dominant genes prevailing. Ratio (H1/D)1/2 was higher than 1 in all three tested traits. Calculated values for heritability

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da Silva Júnior, Antônio Carlos, Michele Jorge da Silva, Cosme Damião Cruz, et al. "Prediction of the importance of auxiliary traits using computational intelligence and machine learning: A simulation study." PLOS ONE 16, no. 11 (2021): e0257213. http://dx.doi.org/10.1371/journal.pone.0257213.

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The present study evaluated the importance of auxiliary traits of a principal trait based on phenotypic information and previously known genetic structure using computational intelligence and machine learning to develop predictive tools for plant breeding. Data of an F2 population represented by 500 individuals, obtained from a cross between contrasting homozygous parents, were simulated. Phenotypic traits were simulated based on previously established means and heritability estimates (30%, 50%, and 80%); traits were distributed in a genome with 10 linkage groups, considering two alleles per m

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Korol, Abraham B., Yefim I. Ronin, Alexander M. Itskovich, Junhua Peng, and Eviatar Nevo. "Enhanced Efficiency of Quantitative Trait Loci Mapping Analysis Based on Multivariate Complexes of Quantitative Traits." Genetics 157, no. 4 (2001): 1789–803. http://dx.doi.org/10.1093/genetics/157.4.1789.

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AbstractAn approach to increase the efficiency of mapping quantitative trait loci (QTL) was proposed earlier by the authors on the basis of bivariate analysis of correlated traits. The power of QTL detection using the log-likelihood ratio (LOD scores) grows proportionally to the broad sense heritability. We found that this relationship holds also for correlated traits, so that an increased bivariate heritability implicates a higher LOD score, higher detection power, and better mapping resolution. However, the increased number of parameters to be estimated complicates the application of this ap

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Analla, M., A. Muñoz-Serrano, and J. M. Serradilla. "Analysis of the genetic relationship between litter size and weight traits in Segureña sheep." Canadian Journal of Animal Science 77, no. 1 (1997): 17–21. http://dx.doi.org/10.4141/a95-137.

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A selection program is being implemented to improve meat production in the Segureña breed of sheep. Increasing litter size per ewe is the main objective, but possible repercussions on weight traits of lambs should be considered. The aim of this work is to determine the relationship between litter size and weight at birth, weaning and at 90 d. Records of 8117 animals, during 11 yr of production, taken from 1981 to 1991 in an experimental flock, were used to estimate heritabilities, repeatability, and genetic and environmental correlations by means of single-trait and multitrait linear models. H

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Novotna, Alexandra, Alena Birovas, Hana Vostra-Vydrova, Zdenka Vesela, and Lubos Vostry. "Genetic Parameters of Performance and Conformation Traits of 3-Year-Old Warmblood Sport Horses in the Czech Republic." Animals 12, no. 21 (2022): 2957. http://dx.doi.org/10.3390/ani12212957.

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The aim of this study was to estimate the genetic parameters of a one-day performance test together with the linear type traits of 3-year-old warmblood horses. The study of genetic parameters was based on 5958 tested horses in the period 1998–2021. A total of 22 traits of linear description, three quantitatively measured traits, and one summary mark from the performance test were tested. The model equation included the fixed effect of gender and combination effects of classifier–year of evaluation–place. A single-trait animal model was used for the estimation of heritability and genetic varian

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Önder, Hasan, Beata Sitskowska, Burcu Kurnaz, et al. "Multi-Trait Single-Step Genomic Prediction for Milk Yield and Milk Components for Polish Holstein Population." Animals 13, no. 19 (2023): 3070. http://dx.doi.org/10.3390/ani13193070.

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The objective of our study was to evaluate the predictive ability of a multi-trait genomic prediction model that accounts for interactions between marker effects to estimate heritability and genetic correlations of traits including 305-day milk yield, milk fat percentage, milk protein percentage, milk lactose percentage, and milk dry matter percentage in the Polish Holstein Friesian cow population. For this aim, 14,742 SNP genotype records for 586 Polish Holstein Friesian dairy cows from Poland were used. Single-Trait-ssGBLUP (ST) and Multi-Trait-ssGBLUP (MT) methods were used for estimation.

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Freyer, G., R. Staufenbiel, E. Fischer, and L. Panicke. "Parameters of glucose tolerance test traits in dairy cattle." Archives Animal Breeding 49, no. 2 (2006): 120–32. http://dx.doi.org/10.5194/aab-49-120-2006.

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Abstract. Numerous studies in dairy cattle focused on measuring the content of hormones, metabolites and enzyme activities in blood. Response on glucose challenge in 620 dairy bulls within a defined period of 340 … 450 days of age is targeted on within this paper. The time response course after glucose challenge was the basis for selecting corresponding response traits. Deviation from normal distribution was taken into account by means of comparing parameters of original data, after logarithmic transformation and breeding values obtained from both. The residual plots did not confirm the necess

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Naharudin, Nazatul Shima, Maizura Abu Sin, and Ghizan Saleh. "Genetic Variance and Correlation of Forage Yield and Quality Traits in Tropically Adapted Maize." Sains Malaysiana 50, no. 1 (2021): 45–52. http://dx.doi.org/10.17576/jsm-2021-5001-05.

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Two F2 populations segregating for biomass yield and forage quality traits were developed from two separate crosses of tropically adapted maize inbred lines. The parental, F1 and F2 generations of both crosses were evaluated to estimate broad sense heritability, genetic advance and correlations for these traits to suggest the best traits as selection criteria towards breeding forage maize with high yield and quality.In Cross 1, biomass yield trait with the highest broad-sense heritability was plant height (70.03%), whereas forage quality trait with the highest heritability estimate was crude p

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Fan, Zhuping, Yike Gao, Ling Guo, Ying Cao, Rong Liu, and Qixiang Zhang. "Phenotypic Variations and Heritability in Hybrid Populations of Bearded Iris." HortScience 54, no. 6 (2019): 988–92. http://dx.doi.org/10.21273/hortsci13884-19.

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Bearded iris (Iris ×hybrida Hort.) is a large horticultural hybrid complex in the Iris genus, and the lack of understanding about its inheritance laws has seriously hindered the breeding process. From parental bearded iris ‘Indian Chief’ and ‘Sugar Blues’, four hybrid populations—including F1, F2, BC1P1, and BC1P2—were generated through hybridization. Fifteen key phenotypic traits, including plant height (PH), scape height (SH), length of fall (LF), width of fall (WF), length of standard (LS), width of standard (WS), and so on, were measured, and several genetic parameters (e.g., trait variati

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Visscher, Peter M. "Musings on Visscher et al. (2006)." Twin Research and Human Genetics 23, no. 2 (2020): 107–8. http://dx.doi.org/10.1017/thg.2020.21.

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AbstractThe classical twin design relies on a number of strong number of assumptions in order to yield unbiased estimates of heritability. This includes the equal environments assumption — that monozygotic and dizygotic twins experience similar degrees of environmental similarity — an assumption that is likely to be violated in practice for many traits of interest. An alternative method of estimating heritability that does not suffer from many of these limitations is to model trait similarity between sibling pairs as a function of their empirical genome-wide identity by descent sharing, estima

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Srivastava, Swati, Bryan Irvine Lopez, Sara de las Heras-Saldana, et al. "Estimation of Genetic Parameters by Single-Trait and Multi-Trait Models for Carcass Traits in Hanwoo Cattle." Animals 9, no. 12 (2019): 1061. http://dx.doi.org/10.3390/ani9121061.

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Hanwoo breed is preferred in South Korea because of the high standards in marbling and the palatability of its meat. Numerous studies have been conducted and are ongoing to increase the meat production and quality in this beef population. The aim of this study was to estimate and compare genetic parameters for carcass traits using BLUPF90 software. Four models were constructed, single trait pedigree model (STPM), single-trait genomic model (STGM), multi-trait pedigree model (MTPM), and multi-trait genomic model (MTGM), using the pedigree, phenotype, and genomic information of 7991 Hanwoo cattl

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Radojković, Dragan, Radomir Savić, Mladen Popovac, Čedomir Radović, and Marija Gogić. "The Share of Variance Components and Correlations Between Sow Production Traits in Different Treatments of the Litter Size (The Repeatability and Multi-Trait Models)." Contemporary Agriculture 67, no. 3-4 (2018): 207–14. http://dx.doi.org/10.1515/contagri-2018-0030.

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Summary The share of variance components and correlations between the most important sow production traits (namely duration of fattening - DF, backfat thickness - BF and number of liveborn piglets - NBA) included in the pig breeding selection programme of the Republic of Serbia were estimated in this paper. The litter size at repeated farrowings (NBA1,..., NBA6) was treated as a separate trait (the multi-trait model), whereas the litter size at birth was treated as a trait repeated a number of times (the repeatability model)). The estimation of dispersion parameters was performed using the Res

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Zhang, F. Q., B. Xu, H. X. Yang, et al. "Genetic parameters and prediction of breeding values in Castanopsis hystrix A.DC. for growth and form traits." Silvae Genetica 64, no. 1-6 (2015): 81–90. http://dx.doi.org/10.1515/sg-2015-0007.

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AbstractCastanopsis hystrix A.DC. is one of the most important and multipurpose tree species native to China. 157 open-pollinated families collected from 11 provenances in Guangdong, Guangxi, and Fujian province were used to estimate genetic parameters for height (H), diameter at breast height (DBH), ground diameter (GD), and crown width (CW) for each province and combined three provinces at ages from 3 to 9 years. The variance component was small and non-significant among provenances but was highly significant among families within provenances for H, DBH, GD, and CW. Heritability estimates we

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Roka, Punam, Suraj Shrestha, Shiva Prasad Adhikari, Ayushma Neupane, Briksha Shreepaili, and Mohan Kumar Bista. "A review on genetic parameters estimation, trait association, and multivariate analysis for crop improvement." Archives of Agriculture and Environmental Science 9, no. 3 (2024): 618–25. http://dx.doi.org/10.26832/24566632.2024.0903029.

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This review paper aims to elucidate the critical genetic parameters essential for practical crop breeding, focusing on the nature and extent of variability, its inheritance, and the complexity of traits. By evaluating genetic parameters such as Genetic Coefficient of Variation (G.C.V.), Heritability, Genetic Advance as a percentage of the Mean (G.A.M.), correlation coefficients, path coefficient analysis, cluster analysis, and principal component analysis, the review provides a comprehensive framework for optimizing breeding strategies. Emphasizing higher G.C.V. values minimizes environmental

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Wang, J., N. O. I. Cogan, L. W. Pembleton, and J. W. Forster. "Variance, inter-trait correlation, heritability and trait-marker association of herbage yield, nutritive values, and morphological characteristics in Italian ryegrass (Lolium multiflorum Lam.)." Crop and Pasture Science 66, no. 9 (2015): 973. http://dx.doi.org/10.1071/cp15070.

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Italian ryegrass (Lolium multiflorum Lam.) is one of the most important temperate forage grasses on a global basis. The present study estimated trait variance, inter-trait correlation and broad-sense heritability (H2) for herbage yield, nutritive values and morphological characteristics of Italian ryegrass, and analysed associations between these traits and single nucleotide polymorphism (SNP) markers. A field-based, spaced-plant nursery experiment was conducted to assess 960 genotypes from seven cultivars and breeding lines, in a randomised complete block design with four replicates. Signific

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Karimi, Z., M. Sargolzaei, J. A. B. Robinson, and F. S. Schenkel. "Assessing haplotype-based models for genomic evaluation in Holstein cattle." Canadian Journal of Animal Science 98, no. 4 (2018): 750–59. http://dx.doi.org/10.1139/cjas-2018-0009.

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A single-nucleotide polymorphisms-based genomic relationship matrix (GSNP) discriminate less identity by state from identity by descent (IBD) alleles compared with a multi-locus haplotype-based relationship matrix (GHAP), which can better capture IBD alleles and recent relationships. We aimed to compare the prediction reliability and prediction bias of genomic best linear unbiased prediction (GBLUP) using either GSNP or GHAP in Holstein cattle. Therefore, a total of 57 traits with a wide range of heritability values were analyzed. Classical validation tests were done using a validation dataset

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Otwinowska-Mindur, Agnieszka, Ewa Ptak, Wojciech Jagusiak, and Andrzej Żarnecki. "Genetic Parameters of Conformation Traits in Young Polish Holstein-Friesian Bulls." Annals of Animal Science 14, no. 4 (2014): 831–40. http://dx.doi.org/10.2478/aoas-2014-0071.

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Abstract The objective of this study was to estimate the genetic parameters of conformation traits in Polish Holstein-Friesian bulls evaluated for registration in the herd book and for entry into progeny testing. Data were 8 linearly scored (1-9 scale) and 6 composite (scored from 50 to 100) conformation traits of 2,738 young bulls born between 2001 and 2011. The multiple-trait REML method was applied for (co)variance component estimation. The linear model included fixed linear regressions on age at evaluation (from 10 to 23 months), fixed effects of year of birth, fixed effects of herd-classi

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Petrovic, Milica, M. Pusic, D. Radojkovic, M. Mijatovic, C. Radovic, and B. Zivkovic. "Phenotypic and genetic variability of quality traits of carcass sides and meat." Biotehnologija u stocarstvu 22, no. 5-6 (2006): 1–10. http://dx.doi.org/10.2298/bah0606001p.

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Investigation of phenotypic and genetic variability of carcass side quality traits and pH values of M. semimembranosusa was carried out on 997 fatteners (446 females and 551 castrates) who originated from 20 sires. Sires were pure breed (Swedish Landrace, Large White and Duroc) and two breed crosses (Duroc x hampshire). In average 48,8 progeny - fatteners over sire were tested. Obtained data was processed by application of several methods of least squares (Harvey, 1990) in which sire genotype, sex and mass of warm carcass sides were included (linear effect) or age at the end of fattening (line

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Peters, Sunday O., Kadir Kizilkaya, Dorian Garrick, and James Reecy. "PSX-9 Comparison of single- and multiple-trait genomic predictions of cattle carcass quality traits in multibreed and purebred populations." Journal of Animal Science 102, Supplement_3 (2024): 453–54. http://dx.doi.org/10.1093/jas/skae234.512.

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Abstract Estimation of genetic parameters for carcass traits and their use in the evaluation of carcass quality is of considerable importance in the genetic improvement of beef cattle. The objective of this study was to compare the predictive ability of single- and multi-trait genomic prediction models for the following carcass quality traits: hot carcass weight (HCW); fat thickness (FAT); rib eye area (REA); marbling score (MARB); and peak force (PEAKF) from multibreed and purebred populations. The purebred population included 1,068 purebred Angus animals from Iowa State University whereas th

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Cramer, Christopher S. "Onion Trait Heritability and Response from Selection." Journal of the American Society for Horticultural Science 131, no. 5 (2006): 646–50. http://dx.doi.org/10.21273/jashs.131.5.646.

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Realized heritability estimates of bolting percentage, pink root and fusarium basal rot severities and incidences, and percentage of single-centered bulbs were estimated for half-sib families of an intermediate-day, open-pollinated onion (Allium cepa L.) population using selection response analysis. Half-sib families were selected based upon an index that equally weighted bolting percentage, pink root and fusarium basal rot severities and incidences, percentage of single-centered bulbs, and bulb quality. Families were subjected to one cycle of half-sib family recurrent selection. Pink root and

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K, Vandana, Vijaya Bhaskar V, Dorajeerao A V D, Subbaramamma P, Paratpara Rao M, and Sekhar V. "Genetic variability, heritability and genetic advance in chrysanthemum (Dendranthema grandiflora) genotypes evaluated for loose flower production." Electronic Journal of Plant Breeding 15, no. 4 (2024): 885–89. https://doi.org/10.37992/2024.1504.106.

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Abstract Twenty-five genotypes of chrysanthemum were evaluated for loose flower yield under open field conditions in a Completely Randomized Block Design during the year 2023-24 to ascertain their genetic variability, heritability and genetic advance for various quantitative and qualitative qualities that can be used to choose parents. Analysis of variance exhibited noteworthy variation in the genetic potential of the genotypes for every trait under study. The magnitude of phenotypic coefficient of variation (PCV) for each trait was discovered to be higher than the genotypic coefficient of var

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Oyedoyin, Femi Patrick, Odunayo J. Olawuyi, Paterne Angelot Agre, Kayode R. Fowobaje, and Asrat Asfaw. "GENETIC VARIABILITY AND MULTI-TRAIT SELECTION FOR SUPERIOR TRAITS IN WILD YAM HYBRIDS." FUDMA JOURNAL OF SCIENCES 9, no. 3 (2025): 224–32. https://doi.org/10.33003/fjs-2025-0903-3243.

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The interspecific breeding of yams (Dioscorea spp.) for superior traits is hindered by the dioecious nature of their flowers and low flowering frequency, despite the potential of wild yams to improve related cultivated varieties. However, the genetic variability of these wild yam species has yet to be fully explored. This study investigated the genetic variability and heritability estimates for multi-trait selection of hybrids derived from crosses between two wild yam species, Dioscorea abyssinica and Dioscorea praehensilis. Field experiment was conducted on 65 hybrids using a partially replic

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Teixeira, B. B., R. R. Mota, R. B. Lôbo, et al. "Genetic evaluation of growth traits in Nellore cattle through multi-trait and random regression models." Czech Journal of Animal Science 63, No. 6 (2018): 212–21. http://dx.doi.org/10.17221/21/2017-cjas.

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We aimed to evaluate different orders of fixed and random effects in random regression models (RRM) based on Legendre orthogonal polynomials as well as to verify the feasibility of these models to describe growth curves in Nellore cattle. The proposed RRM were also compared to multi-trait models (MTM). Variance components and genetic parameters estimates were performed via REML for all models. Twelve RRM were compared through Akaike (AIC) and Bayesian (BIC) information criteria. The model of order three for the fixed curve and four for all random effects (direct genetic, maternal genetic, perm

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Mamtani, Manju, Manisha T. Jaisinghani, Sujeet G. Jaiswal, Kanchan V. Pipal, Ashwini A. Patel, and Hemant Kulkarni. "Genetic association of anthropometric traits with type 2 diabetes in ethnically endogamous Sindhi families." PLOS ONE 16, no. 9 (2021): e0257390. http://dx.doi.org/10.1371/journal.pone.0257390.

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Background Ethnically endogamous populations can shed light on the genetics of type 2 diabetes. Such studies are lacking in India. We conducted this study to determine the genetic and environmental contributions of anthropometric traits to type 2 diabetes risk in the Sindhi families in central India. Methods We conducted a family study in Indian Sindhi families with at least one case of type 2 diabetes. Variance components methods were used to quantify the genetic association of 18 anthropometric traits with eight type 2 diabetes related traits. Univariate and bivariate polygenic models were u

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Arzik, Yunus, Mehmet Kizilaslan, Sedat Behrem, Stephen N. White, Lindsay M. W. Piel, and Mehmet Ulas Cinar. "Genome-Wide Scan of Wool Production Traits in Akkaraman Sheep." Genes 14, no. 3 (2023): 713. http://dx.doi.org/10.3390/genes14030713.

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The objective of this study was to uncover the genetic background of wool quality, a production trait, by estimating genomic heritability and implementing GWAS in Akkaraman sheep. The wool characteristics measured included fibre diameter (FD) and staple length (SL) at the age of 8 months and yearling fibre diameter (YFD), yearling staple length (YSL) and yearling greasy fleece weight (YGFW) at 18 months of age. Animals were genotyped using the Axiom 50 K Ovine Genotyping Array. Maximum likelihood estimations of a linear mixed model (LMM) were used to estimate genomic heritability, where GWAS w

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Ehsaninia, Jamshid, Mohammad Bagher Zandi, Moein Taned, and Alireza Bagheripour. "Bayesian approach to estimate variance components and genetic parameters of dairy traits and somatic cell score in Murciano-Granadina goats." Journal of Agricultural Science 163, no. 3 (2025): 352–62. https://doi.org/10.1017/s0021859625000267.

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AbstractThe aim of this study was to estimate genetic parameters for dairy traits (daily milk yield (DMY), daily milk fat yield (DMFY), and daily milk protein yield (DMPY)) and somatic cell score (SCS) of Iranian Murciano-Granadina goats. The analysis involved 99,839 records from 4,307 does, spanning from 2015 to 2021. A single-trait animal model was used to obtain estimates of genetic and residual (co)variances and heritabilities. In the model, both fixed effects (birth year, parity, litter size, age dam (day)) and random effects (additive animal genetic effects) were considered. R software w

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Mihai, G., I. Mirancea, and C. Duta. "Variation of the quantitative traits in a progeny test of Abies alba (Mill.) at the nursery stage." Silvae Genetica 63, no. 1-6 (2014): 275–84. http://dx.doi.org/10.1515/sg-2014-0035.

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AbstractFifty-one full-sib families were created using 11 parents in a silver fir seed orchard and a half-diallel mating design. The seeds of control-pollinated families were sown in a nursery in autumn 2007. Growth and branches traits were measured during nursery testing, and genetic parameters were estimated at the ages of 3, 4, 5, and 6 years. The additive and dominance genetic variances were major sources of genetic variance. Dominance variance was greater than additive variance at these early ages for all traits. However, the ratio of SCA/GCA variance decreased from 23 to 14 for total hei

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Azevedo Junior, Jairo, Juliana Petrini, Gerson Barreto Mourão, and José Bento Sterman Ferraz. "Categorical Visual Score Traits of a Nellore Beef Cattle Population." Journal of Agricultural Science 9, no. 8 (2017): 63. http://dx.doi.org/10.5539/jas.v9n8p63.

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Variance components and genetic parameters of economically relevant traits in livestock, whether continuous or categorical, can be estimated by methods computationally available providing support for the selection and mating of animals in breeding programs. The objectives of this paper were to obtain and compare the variance components estimates for visual traits under continuous or categorical distribution in single-trait analysis and their correlations with continuous productive traits in two-trait analysis. Data of conformation (CONF), precocity of fat deposition (PREC) and muscling (MUSC)

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Dubuc, Constance, Sandra Winters, William L. Allen, et al. "Sexually selected skin colour is heritable and related to fecundity in a non-human primate." Proceedings of the Royal Society B: Biological Sciences 281, no. 1794 (2014): 20141602. http://dx.doi.org/10.1098/rspb.2014.1602.

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Sexual selection promotes the prevalence of heritable traits that increase an individual's reproductive rate. Despite theoretically strong directional selection, sexually selected traits can show inter-individual variation. Here, we investigate whether red skin ornamentation, a rare example of a male mammalian trait involved in mate attraction, influences fecundity and is heritable in rhesus macaques ( Macaca mulatta ), and explore the mechanisms that are involved in maintaining trait variation. Interestingly, the trait is expressed by and is attractive to both sexes. We collected facial image

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Zheng, Xu, Tianliu Zhang, Tianzhen Wang, et al. "Long-Term Impact of Genomic Selection on Genetic Gain Using Different SNP Density." Agriculture 12, no. 9 (2022): 1463. http://dx.doi.org/10.3390/agriculture12091463.

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Genomic selection (GS) has been widely used in livestock breeding. However, the long-term impact of GS on genetic gain, as well as inbreeding levels, has not been fully explored in beef cattle. In this study, we carried out simulation analysis using different approaches involving two types of SNP density (54 K and 100 K) and three levels of heritability traits (h2 = 0.1, 0.3, and 0.5) to explore the long-term effects of selection strategies on genetic gain and average kinship coefficients. Our results showed that GS can improve the genetic gain across generations, and the GBLUP strategy showed

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