Combining ability analysis for production traits in meat type chicken. / Thakur U .C.    

Public ISBD in Promotion of animal production through research and development: Proceedings of the 2nd National Animal Science Convention, Lalitpur, August 7-10, 1995 / Pariyar, D.     Title : Combining ability analysis for production traits in meat type chicken. Material Type: printed text Authors: Thakur U .C., Author ; Varma S.K, Author Publisher: Lalitpur : Nepal Animal Science Association Publication Date: 1995 Pagination: 78-81 p. Keywords: Animal  products;  Research;  Fisheries;  Pastures;  Livestock Abstract: A complete dialed involving four  breeds viz. Rhode Island red, Australorp, whit Plymouth Rock and whiteCornish was conducted  Total 507 chicks belonging .to sixteen genetic groups resulting from  8 hatches onwhich data were available for production  traits, were utilized for  analysis. The traits studied were age andweight at sexual maturity and 90 days egg production.  All crosses differed significantly.  The direct genetic effect estimated were positive  in white Plymouth Rock and white Cornish for  the traits and variance due to direct genetic effect was highly significant. Average heterosis estimated was highest for weight at sexualmaturity 33.719±10.305 and with exception of age at sexual maturity, weight at sexual maturity and 90days egg production were highly significant.  Line heterosis was also highly significant for all the traits.The  lines  with  best  specific  combining  ability  were  RIRxAo,  RIRxWPR   WPRxWC for   age  at  sexualmaturity, RIRxAo and WPRxWC for  90 days egg production.  Variance due to SCA was highly significantfor  weight at sexual maturity and 90 days egg production  but not for  age at sexual maturity The Residualreciprocal  effect was highly significant for  age and weight  at sexual  maturity  but not for  90 days eggproduction.  Intra population selection could be adopted for improvement of economic traits for furtherdiallel experiments. Link for e-copy: http://elibrary.narc.gov.np/?r=735 in Promotion of animal production through research and development: Proceedings of the 2nd National Animal Science Convention, Lalitpur, August 7-10, 1995 / Pariyar, D.     Combining ability analysis for production traits in meat type chicken. [printed text] / Thakur U .C., Author ; Varma S.K, Author . - Lalitpur : Nepal Animal Science Association, 1995 . - 78-81 p. Keywords: Animal  products;  Research;  Fisheries;  Pastures;  Livestock Abstract: A complete dialed involving four  breeds viz. Rhode Island red, Australorp, whit Plymouth Rock and whiteCornish was conducted  Total 507 chicks belonging .to sixteen genetic groups resulting from  8 hatches onwhich data were available for production  traits, were utilized for  analysis. The traits studied were age andweight at sexual maturity and 90 days egg production.  All crosses differed significantly.  The direct genetic effect estimated were positive  in white Plymouth Rock and white Cornish for  the traits and variance due to direct genetic effect was highly significant. Average heterosis estimated was highest for weight at sexualmaturity 33.719±10.305 and with exception of age at sexual maturity, weight at sexual maturity and 90days egg production were highly significant.  Line heterosis was also highly significant for all the traits.The  lines  with  best  specific  combining  ability  were  RIRxAo,  RIRxWPR   WPRxWC for   age  at  sexualmaturity, RIRxAo and WPRxWC for  90 days egg production.  Variance due to SCA was highly significantfor  weight at sexual maturity and 90 days egg production  but not for  age at sexual maturity The Residualreciprocal  effect was highly significant for  age and weight  at sexual  maturity  but not for  90 days eggproduction.  Intra population selection could be adopted for improvement of economic traits for furtherdiallel experiments. Link for e-copy: http://elibrary.narc.gov.np/?r=735

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