Production of Rhode Island Red × Naked Neck hybrid hens under conditions of the family poultry production systems in a warm environment.

Context: Under the conditions of family poultry production systems (FPPS), hens carrying the Naked Neck gene (Na) could be a sustainable alternative, not only because of their better productive performance in the face of climate change, but also because of their greater tolerance to the zootechnical deficiencies that characterize FPPS, thereby improving food security in rural communities. Aim: This study compared the productivity of Rhode Island Red × Naked Neck hybrid hens (partial Naked Neck hens (PNNH; Na·na) vs full plumage hens (FFH; na·na)) under FPPS conditions in a warm environment. Methods: Sixty hens (30 PNNH and 30 FFH) were used in the analysis. The dependent variables included feed intake, feed conversion, average live weight gain, nutrient balance, and variables associated with egg production and quality. Key results: PNNH under FPPS conditions in a warm environment presents a marked advantage over FFH, which is associated with the adaptation of hens to thermal stress. This characteristic favors more stable egg production, with higher and more consistent laying rates, as well as greater feed efficiency, as they maintain regular consumption of nutrients, even under heat stress conditions. Conclusions: The introduction or hybridization of Naked Neck hens is a viable and sustainable alternative for making FPPS more efficient in warm environments. Implications: The heat stress resistance of Naked Neck hens makes them a sustainable alternative for poultry farming in the context of climate change, with potential applications in genetic improvement programs and agricultural policies focused on sustainable production. Naked Neck hens offer key advantages for family poultry farming, especially in warm climates. Their higher heat tolerance helps maintain stable feed intake and consistent egg production, unlike fully feathered breeds. They also exhibit better feed conversion efficiency, lowering feeding costs and improving resource use. With reduced metabolic heat production, they achieve better thermal balance, supporting growth and reproduction. These traits make them a sustainable and profitable choice for small-scale poultry systems facing challenging environmental conditions. [ABSTRACT FROM AUTHOR]