ArticleVeterinary world2026
Growth-maturity-egg production trade-offs and candidate gene associations with egg-laying persistency in slow-growing Thai native chickens.
Article in Veterinary world, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background and Aim: Slow-growing Thai native chickens are valuable genetic resources for sustainable poultry production under tropical conditions, but their reproductive efficiency is constrained by trade-offs among growth, sexual maturity, egg production, and egg-laying persistency. This study investigated the multivariate structure and genetic basis of these trade-offs and evaluated trait-specific associations between candidate gene polymorphisms and estimated breeding values (EBVs). Materials and Methods: Phenotypic, pedigree, and genotypic data were obtained from 563 female Pradu Hang Dum chickens across two generations. Growth performance, reproductive timing, egg production, and egg-laying persistency traits were recorded over a 365-day laying cycle. Principal component analysis (PCA) was used to characterize trait clustering. Genetic parameters and correlations were estimated using single- and bivariate animal models with average information restricted maximum likelihood procedures. Candidate gene polymorphisms in dopamine receptor D2 ( Results: PCA identified four principal components explaining 71.7% of the total phenotypic variance, clearly separating growth, sexual maturity, egg production output, and egg-laying persistency. Heritability estimates were high for birth weight (0.72), moderate for body weight at age at first egg (0.47) and persistency ratio (0.43), and low for cumulative egg number traits (0.08-0.12). Genetic correlations between egg number and persistency were strongly negative (-0.70 to -0.88). Candidate gene analyses detected significant genotype-dependent differences in EBVs for cumulative egg number at 360 days associated with Conclusion: Egg-laying persistency represents a distinct biological dimension from growth and egg number in Thai native chickens. Incorporation of persistency into EBV-based multi-trait selection programs, together with the complementary use of candidate gene markers, may enhance long-term productivity and sustainability of indigenous chickens under tropical production systems. These findings provide a foundation for developing resilient dual-purpose breeding strategies that balance productivity and reproductive stability.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.