Growth, conformation, and egg-weight traits of CARI Nirbheek and CARI Shyama chickens across the foundation cross and first inter se generation.
- 1Indian Council of Agricultural Research (ICAR)-Central Avian Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India.
- 2Indian Council of Agricultural Research (ICAR)-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India.
- 3Nagpur Veterinary College, Maharashtra Animal and Fishery Sciences University, Nagpur, Maharashtra, India.
Abstract
Introduction
Improved native chicken lines are important for low-input poultry systems and rural livelihood security. This study evaluated the phenotypic performance of CARI Nirbheek (Aseel Peela × CARI Red) and CARI Shyama (Kadaknath × CARI Red) across the foundation cross (F₁) and first inter se generation (F₂).Methods
The F₁ and F₂ cohorts comprised 6,000 and 1,200 chicks, respectively. Body weight, bodyweight gain, morpho-conformation traits, and egg weight at 27 and 40 weeks were recorded and compared between the two lines within each cohort and descriptively across cohorts.Results
CARI Nirbheek showed a larger body-frame profile, with greater shank length, keel length, and breast angle at all measured ages. Body weight was age-dependent: CARI Shyama was heavier at selected early juvenile ages, whereas CARI Nirbheek was generally heavier from 8 weeks onward, reaching 1,285.19 ± 6.383 g in F₁ and 1,236.66 ± 8.367 g in F₂ at 20 weeks. Between-line egg-weight differences were significant in F₁ but not in F₂. At 20 weeks, body weight was virtually unchanged between cohorts in CARI Shyama but was modestly lower in F₂. CARI Nirbheek, whereas morphoconformation and egg-weight traits showed comparatively similar mean values across cohorts.Discussion
Both lines exhibited distinct phenotypic profiles that may inform future selection strategies, subject to confirmation of heritability and genetic correlations in subsequent generations. Because F₁ and F₂ were produced in different hatching and rearing cycles, generation was confounded with year, season, batch, and selection history; therefore, these comparisons represent cohort-level phenotypic differences rather than direct evidence of genetic change, heterosis retention, genetic fixation, or long-term stability.
Related
- Pocket contrastive learning and conformation fusion for robust structure-conditioned 3D molecular generation under receptor conformational variation.
- Growth performance, carcass traits, blood indices, and cecal bacterial load of Koekoek chickens fed diets containing neem leaf meal, bitter leaf meal, and garlic powder
- Comparative effects of Mannan oligosaccharide, synbiotic, and their combination on growth performance and intestinal health in broiler chickens
- Phytobiotic Supplementation as a Sustainable Alternative to Antibiotic Growth Promoters: Impacts on Growth, Carcass Traits, Blood Lipids and Faecal Microbial Characteristics in Sonali Chickens.
- Meta-analysis of dietary chicory (Cichorium intybus L.) modulation of the growth performance of broiler chickens
BibTeX
@article{rokade2026growth,
title = {{Growth, conformation, and egg-weight traits of CARI Nirbheek and CARI Shyama chickens across the foundation cross and first inter se generation.}},
author = {Jaydip Rokade and Roshni Chand and Nitish Gaitri and Vivek Srivastava and Gautham Kolluri and Darshana Bhaisare and Sai Siva Kumar Katam and Matin Ansari},
journal = {Frontiers in veterinary science},
year = {2026},
month = oct,
doi = {10.3389/fvets.2026.1945142},
url = {https://europepmc.org/article/MED/42923051},
note = {CC BY},
}
RIS
TY - JOUR
TI - Growth, conformation, and egg-weight traits of CARI Nirbheek and CARI Shyama chickens across the foundation cross and first inter se generation.
AU - Jaydip Rokade
AU - Roshni Chand
AU - Nitish Gaitri
AU - Vivek Srivastava
AU - Gautham Kolluri
AU - Darshana Bhaisare
AU - Sai Siva Kumar Katam
AU - Matin Ansari
PY - 2026
DA - 2026/10/08
JO - Frontiers in veterinary science
DO - 10.3389/fvets.2026.1945142
UR - https://europepmc.org/article/MED/42923051
AB - Introduction Improved native chicken lines are important for low-input poultry systems and rural livelihood security. This study evaluated the phenotypic performance of CARI Nirbheek (Aseel Peela × CARI Red) and CARI Shyama (Kadaknath × CARI Red) across the foundation cross (F₁) and first inter se generation (F₂).Methods The F₁ and F₂ cohorts comprised 6,000 and 1,200 chicks, respectively. Body weight, bodyweight gain, morpho-conformation traits, and egg weight at 27 and 40 weeks were recorded and compared between the two lines within each cohort and descriptively across cohorts.Results CARI Nirbheek showed a larger body-frame profile, with greater shank length, keel length, and breast angle at all measured ages. Body weight was age-dependent: CARI Shyama was heavier at selected early juvenile ages, whereas CARI Nirbheek was generally heavier from 8 weeks onward, reaching 1,285.19 ± 6.383 g in F₁ and 1,236.66 ± 8.367 g in F₂ at 20 weeks. Between-line egg-weight differences were significant in F₁ but not in F₂. At 20 weeks, body weight was virtually unchanged between cohorts in CARI Shyama but was modestly lower in F₂. CARI Nirbheek, whereas morphoconformation and egg-weight traits showed comparatively similar mean values across cohorts.Discussion Both lines exhibited distinct phenotypic profiles that may inform future selection strategies, subject to confirmation of heritability and genetic correlations in subsequent generations. Because F₁ and F₂ were produced in different hatching and rearing cycles, generation was confounded with year, season, batch, and selection history; therefore, these comparisons represent cohort-level phenotypic differences rather than direct evidence of genetic change, heterosis retention, genetic fixation, or long-term stability.
SN - 2297-1769
ER -