{
  "abstract": "Introduction\n\nImproved 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\n\nThe 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\n\nCARI 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\n\nBoth 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.",
  "abstract_shown": true,
  "affiliations": [
    "Indian Council of Agricultural Research (ICAR)-Central Avian Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India.",
    "Indian Council of Agricultural Research (ICAR)-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India.",
    "Nagpur Veterinary College, Maharashtra Animal and Fishery Sciences University, Nagpur, Maharashtra, India."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Jaydip Rokade"
    },
    {
      "affs": [
        1
      ],
      "name": "Roshni Chand"
    },
    {
      "affs": [
        1
      ],
      "name": "Nitish Gaitri"
    },
    {
      "affs": [
        0
      ],
      "name": "Vivek Srivastava"
    },
    {
      "affs": [
        0
      ],
      "name": "Gautham Kolluri"
    },
    {
      "affs": [
        2
      ],
      "name": "Darshana Bhaisare"
    },
    {
      "affs": [
        0
      ],
      "name": "Sai Siva Kumar Katam"
    },
    {
      "affs": [
        0
      ],
      "name": "Matin Ansari"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/20e3gzd5m4wrw.bib",
  "cited_by": 0,
  "doi": "10.3389/fvets.2026.1945142",
  "fulltext_url": "https://europepmc.org/articles/PMC13686922",
  "id": "20e3gzd5m4wrw",
  "issns": [
    "2297-1769"
  ],
  "landing_url": "https://europepmc.org/article/MED/42923051",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1103|Livestock and Poultry Management"
    ]
  ],
  "openalex": "W7220962622",
  "pdf_url": "https://europepmc.org/articles/PMC13686922?pdf=render",
  "pmcid": "PMC13686922",
  "pmid": "42923051",
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/20e3gzd5m4wrw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:36Z",
      "native_id": "MED:42923051",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42923051"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "openalex:1103|Livestock and Poultry Management",
      "subfield": "zoology-behaviour"
    }
  ],
  "title": "Growth, conformation, and egg-weight traits of CARI Nirbheek and CARI Shyama chickens across the foundation cross and first inter se generation.",
  "title_text": "Growth, conformation, and egg-weight traits of CARI Nirbheek and CARI Shyama chickens across the foundation cross and first inter se generation.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:20:36Z",
  "url": "https://research.draconitic.com/paper/20e3gzd5m4wrw",
  "venue": "Frontiers in veterinary science",
  "versions": []
}