African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6667

Full Length Research Paper

Effects of the naked neck phenotype and feed withdrawal on growth performance and carcass characteristics of F1 crossbred broilers from a cross between local naked neck males and Hubbard Flex 15 broiler females

Raymond Teye Bineadeo
  • Raymond Teye Bineadeo
  • Department of Agricultural Science, Akrokerri College of Education, Adansi North, Ghana.
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Kwaku Adomako
  • Kwaku Adomako
  • Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
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Simon Oscar Olympio
  • Simon Oscar Olympio
  • Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
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Maureen Mamle Azu
  • Maureen Mamle Azu
  • Department of Food and Agriculture, Mfanteman Municipal, Ghana.
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Yaw Oppong Frimpong
  • Yaw Oppong Frimpong
  • Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
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Alex Osei
  • Alex Osei
  • Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
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Ishmael Ankamah
  • Ishmael Ankamah
  • Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
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  •  Received: 06 April 2022
  •  Accepted: 15 June 2022
  •  Published: 31 August 2022

Abstract

An eleven-month experiment was conducted to establish the influence of phenotype and feeding systems on growth performance and carcass characteristics of F1 crossbred broilers. One hundred normal feathered broiler breeder females were mated with 10 naked neck males to obtain the F1.  Two hundred and seventy-two chicks obtained from the F1 generation and from four hatches were randomly assigned into four treatments (naked neck full feeding, naked neck feed withdrawal, normal feathered full feeding and normal feathered feed withdrawal) in an RCBD 2 × 2 factorial arrangement and studied for 12 weeks. The naked neck broilers had superior (P < 0.05) weight and better feed conversion compared to their normal feathered counterparts. Chickens on full feeding had higher (P < 0.05) feed intake in comparison to their counterparts on feed withdrawal. Normal feathered birds had higher (P < 0.05) average rectal temperature compared to the naked neck ones. Mortality was lower (P < 0.05) in naked neck birds compared to their normal feathered siblings. Birds on feed withdrawal had higher (P < 0.05) average rectal temperature in contrast to their counterparts on full feeding. The naked neck gene improves growth performance, carcass yield and survivability hence should be incorporated into broiler breeding programmes for tropical countries.

Key words: Broiler, carcass, feed withdrawal, naked neck, phenotype, traits.