ArticlePoultry science2024
Effect of genotype and nutritional and environmental challenges on growth curve dynamics of broiler chickens.
Article in Poultry science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Growth curve responses of two ECC-approved genotypes to locomotor, thermal, and nutritional challenges.Poultry science · 2026Article
- Crossbreeding a Mediterranean Local Chicken Breed with a Medium-Growing Commercial Hybrid as a Complementary Strategy for Conservation and Productive Valorization: Growth Performance, Carcass Traits, and Meat Quality.Animals : an open access journal from MDPI · 2026Article
- Strain-specific responses of commercial broiler chickens to dietary supplementation of turnip leaf powder: Implications on growth performance, blood biochemistry and economic efficiency.Poultry science · 2026Article
- Genotype-Dependent Variations in Egg Quality and Nutritional Composition of Thermotolerant Chickens Under Hot-Climate Conditions.Food science & nutrition · 2026Article
- Carcass Characteristics and Meat Quality of Two Serbian Indigenous Chicken Breeds: Comparative Assessment of Banat Naked Neck and Svrljig Hen.Foods (Basel, Switzerland) · 2026Article
- Italian local chicken breeds: a comparative analysis of biodiversity on a global scale.Genetics, selection, evolution : GSE · 2025Article
- Histochemical and Immunohistochemical Evaluation of the Effects of a Low-Input Diet on Different Chicken Breeds.Animals : an open access journal from MDPI · 2025Article
- Genomic Prediction and Genome-Wide Association Study for Growth-Related Traits in Taiwan Country Chicken.Animals : an open access journal from MDPI · 2025Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The present study aimed to compare the dynamics of growth of various chicken genotypes exposed to heat stress, low-input diets, and free-range farming by using Gompertz model to gain insights into their capabilities to face environmental and nutritional challenges. Three in vivo trials (T1: heat stress, T2: low-input diets, and T3: free-range system) were conducted, involving a total of 671 animals. Five chicken genotypes were employed in each trial: 2 Italian local breeds, Bionda Piemontese (BP) and Robusta Maculata (RM), along with their crossbreeds with Sasso hens (BP×SA and RM×SA), and a commercial hybrid (Ross 308). One-day-old male chicks were individually identified, and the 5 genotypes were randomly allocated to different challenging conditions: T1 involved 2 environmental temperatures (thermoneutral vs. high temperature); T2 involved 2 diets (standard vs. low-input); T3 involved 2 rearing systems (conventional vs. free-range). The chickens were weighed once a week from their arrival until slaughtering, and the data were used to build growth curves using the Gompertz model. Chickens from different genotypes were slaughtered at varying ages based on their maturity. In all trials, the challenging conditions significantly reduced adult body weight (A; -31.0%) and maximum growth rate (MGR; -25.6%) of Ross chickens. In contrast, in T1 and T2, no significant changes were observed in the main growth curve parameters of local breeds and crossbreeds, while under free-range conditions, there was even an increase in the A and MGR of these genotypes. The crossbreeding was effective in increasing A and MGR of BP (+30.5% in BP×SA), as well as in improving the precocity and MGR of RM (+19.5% in RM×SA). Our findings highlight the effectiveness of the Gompertz model as a tool for evaluating birds' adaptability and confirm the greater ability of local breeds and crossbreeds to adapt to different challenges. In conclusion, our methodological approach could be used to choose the genotype most suited to the environmental context and confirm the potential advantages of crossbreeding for enhancing resilience and sustainability.
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