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Open research questions in Genetic and phenotypic traits in livestock

57 unresolved questions extracted from the limitations and future-work sections of 677 Genetic and phenotypic traits in livestock papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • There is a lack of research on the genetic improvement of Jeju Black Cattle. There is a need to develop breeding programs that can improve the genetic quality of Jeju Black Cattle.

    Genomic Breeding Value Prediction and Accuracy Assessment for Carcass Traits in Jeju Black Cattle Using Hanwoo Reference Populations · 2026 · DOI

  • The study faces challenges due to the limited number of males in the dataset. The study highlights the challenge of analyzing qualitative morphological characteristics.

    Phenotypic characterization of Landim and Pafúri goat populations in Southern Mozambique based on morpho-structural traits and zoometric indices · 2026 · DOI

  • The study faced challenges in obtaining complete records for all traits. The study had to use simplified persistency indicators due to the lack of repeated longitudinal egg production records.

    Growth–maturity–egg production trade-offs and candidate gene associations with egg-laying persistency in slow-growing Thai native chickens · 2026 · DOI

  • External fertilization is an environmentally sensitive process. Traditional assessment of reproductive capacity in breeders is often impractical. The true breeding values remain unknown.

    A non-linear game for two: genetic parameters and prediction of fertilization success using Bayesian and machine learning frameworks · 2026 · DOI

  • The study uses a relatively small sample size of Jeju Black Cattle. The study only considers a limited number of carcass traits.

    Genomic Breeding Value Prediction and Accuracy Assessment for Carcass Traits in Jeju Black Cattle Using Hanwoo Reference Populations · 2026 · DOI

  • However, many populations face demographic decline, genetic erosion, and their genomic diversity remains inadequately characterized.

    Unravelling the genetic structure and genetic relationships of indigenous Greek sheep breeds using SNP markers · 2026 · DOI

  • However, the genetic improvement of this complex trait is limited by the inability of conventional genomic Best Linear Unbiased Prediction (gBLUP) model to capture complex, non-linear genetic architectures and epistatic interactions.

    Integrating multi-layer perceptron and random forest in an ensemble framework for improved genomic prediction accuracy and SHAP-derived interpretability of residual feed intake in cattle · 2026 · DOI

  • ” Ne/N ratios this low have rarely been reported for large mammals and generally are thought to apply primarily to some marine species with very high fecundity.

    Extreme male reproductive skew limits effective population size in American Standardbred horses · 2026 · DOI

  • Nevertheless, these trials often fail to represent on-farm growing conditions and farmers’ preferences, potentially leading to poorly defined breeding targets.

    Estimating on-farm genotypic performance and variability using ranking data · 2026 · DOI

  • The study identifies a gap in the evaluation of the effects of genotype on body parameters and secondary sexual characteristics of Nigerian indigenous cock genotypes.

    Genotype effect on growth parameters and secondary sexual characteristics in three Nigerian cock genotypes and their genetic parameters · 2026 · DOI

  • There is a need to study the genetic diversity of the Iraqi marsh buffalo. There is a lack of information on the genetic structure of the Iraqi marsh buffalo population.

    Study of the mitochondrial genome (mtDNA) of the Iraqi marsh buffalo · 2026 · DOI

  • Traditional GP methods have limitations, particularly in handling complex traits and managing vast volumes of genomic data. There is a gap in the underrepresentation of deep learning methodologies in AI journals.

    Systematic literature review using deep learning in plant genomic prediction · 2026 · DOI

  • Complex trait and environment modeling future research should focus more on developing deep learning models for multi-trait [39], multi-environment [33], and timeseries prediction. Based on the analysis conducted, several open challenges and promising avenues for future work can be identified.

    Systematic literature review using deep learning in plant genomic prediction · 2026 · DOI

  • There is a lack of information on the genetic and environmental factors influencing egg traits in blue-breasted quail. Previous studies have reported heritability estimates for egg traits in other species, but not in blue-breasted quail.

    Estimation of Heritability and Permanent Environmental Effects of Egg Traits in the Blue-Breasted Quail (Synoicus chinensis) · 2026 · DOI

  • There is a need to evaluate the level of inbreeding in Polish Simmental cows and its effect on lactational milk traits. There is a lack of information on the changes in the composition of ancestors in young cows.

    Pedigree analysis: estimation of genetic parameters and the effect of inbreeding on dairy traits in Simmental cattle · 2026 · DOI

  • There is a gap in knowledge about the fertility traits of Saanen goats in Bursa, Turkey. The study fills this gap by providing a comprehensive analysis of the breed's fertility characteristics.

    Fertility Traits and Evaluation of Environmental Factors and Body Measurements in Saanen Goats Raised in Bursa · 2026 · DOI

  • Future studies can build on the study's findings to further refine GWAS-identified QTLs and pinpoint candidate variants and genes. The study's methods can be applied to other traits and species.

    Bayesian fine-mapping pinpoints candidate genes and pleiotropic loci of production traits from a chicken backcrossing scheme · 2026 · DOI

  • The study notes that the medium density of SNP arrays limits the resolution for fine-mapping causal variants. The study aims to overcome this limitation through imputation and Bayesian fine-mapping methods.

    Bayesian fine-mapping pinpoints candidate genes and pleiotropic loci of production traits from a chicken backcrossing scheme · 2026 · DOI

  • The study has a limited number of males (n = 6) in the dataset. The study does not perform inferential analysis (Chi-square test) due to low expected frequencies in some qualitative trait categories.

    Phenotypic characterization of Landim and Pafúri goat populations in Southern Mozambique based on morpho-structural traits and zoometric indices · 2026 · DOI

  • Direct measurement of DMI is costly and logistically complex. Prior work has focused on direct measurement of DMI, which is not feasible in large-scale or grazing operations.

    Deployable DMI prediction using GPBoost, MLOps, and flask without the need for exact birth dates · 2026 · DOI

  • The study identifies a gap in the understanding of the genetic basis of trade-offs among growth, reproduction, and environmental adaptation in Thai native chickens. The study highlights the need for further research on the genetic basis of egg-laying persistency.

    Growth–maturity–egg production trade-offs and candidate gene associations with egg-laying persistency in slow-growing Thai native chickens · 2026 · DOI

  • The true breeding values remain unknown. The concordance between tower outputs and EBVs is moderate. The current configuration of the model should be interpreted as predictive scores rather than direct substitutes for breeding values.

    A non-linear game for two: genetic parameters and prediction of fertilization success using Bayesian and machine learning frameworks · 2026 · DOI

  • The study does not report any specific limitations. However, it can be inferred that the large genome size of Korean pine and the limited number of samples may be limitations of the study.

    Genetic diversity study and molecular marker development for economic traits in Korean pine based on RAD-Seq · 2026 · DOI

  • Further studies can be conducted to validate the developed KASP markers in larger populations. The study's findings can be applied to other conifer species with similar genetic characteristics. Further research can be done to explore the genetic diversity of other conifer species.

    Genetic diversity study and molecular marker development for economic traits in Korean pine based on RAD-Seq · 2026 · DOI

  • The study identifies a research gap in the understanding of the FABP gene T>A: 3499 genotype and its association with productive traits in Iraqi buffaloes. The study highlights the importance of genetic improvement programs for Iraqi buffaloes.

    ASSOCIATION OF FABP T3499A GENOTYPE WITH BODY MEASUREMENTS, TEMPERATURE, AND MILK PRODUCTION PARAMETERS IN IRAQI BUFFALOES · 2026 · DOI

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57 open questions have been extracted from the limitations and future-work passages of 677 Genetic and phenotypic traits in livestock papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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