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Rajendranagar, India

Bhattacharya T.K.,Direct Of Poultry Research | Chatterjee R.N.,Direct Of Poultry Research | Dushyanth K.,Direct Of Poultry Research | Paswan C.,Direct Of Poultry Research | Guru Vishnu P.,Direct Of Poultry Research
Journal of Applied Animal Research | Year: 2016

Carcass traits are of immense importance in chicken as some parts of the carcass particularly breast muscle and legs are mostly preferred by the consumers with good market price while the remaining parts have a lower price. Carcass traits primarily depend on the growth of the birds, which are controlled by the candidate genes. Activin receptor type 2A and 2B act as receptors for binding with the members of transforming growth factor superfamily like myostatin to expedite its biological functions. We analysed exon2 and exon4 of activin receptor type 2A and 2B genes in six chicken populations. Both the genes revealed the presence of four haplotypes in these chicken populations. Association studies revealed a significant effect of genotypes and haplotypes on certain carcass traits such as carcass weight, dressing %, back and neck weight, giblet weights, etc. It is concluded that the exons of ACVR2A and ACVR2B genes were polymorphic and potentially associated with certain carcass traits in chicken. © 2015 Taylor & Francis. Source

Padhi M.K.,Direct Of Poultry Research | Chatterjee R.N.,Direct Of Poultry Research | Rajkumar U.,Direct Of Poultry Research | Niranjan M.,Direct Of Poultry Research | Haunshi S.,Direct Of Poultry Research
Journal of Applied Animal Research | Year: 2016

Objective of the work was to develop a three-way cross for egg-type backyard chicken using male and female lines developed from exotic chickens. To improve the egg production further and to get colour plumage pattern, the two-way cross PD1 X IWI males were crossed with PD3 females to produce three-way cross (PD1 X IWI X PD3). The crossbred was evaluated for different traits upto 72 weeks of age. Sexual dimorphisms were evident from two weeks onwards for body weights and shank length differ significantly (P <.05) between male and female at 8, 12 and 16 weeks of age. Male were reared upto 16 weeks of age, and at 16 weeks, body weight of male and female were 1670 and 1096 g, respectively. Carcass quality measured at 16 week of age recorded 66.12% eviscerated carcass yield, 4.84% giblet and 0.30% abdominal fat. Egg production performance recorded from 17 to 72 weeks of age at 4 weeks interval showed significant (P <.05) difference between different periods, and peak egg production was recorded during 29-32 weeks. At 69-72 weeks period, the egg production per bird was 14.78 eggs. Egg production upto 40, 52, 64 and 72 weeks of age were 91.71, 105.84, 204.88 and 233.28 eggs, respectively. Age and weight at sexual maturity were 163.14 days and 1702 g, respectively. Egg weight recorded at 4 weeks interval starting from 20 weeks of age showed linear increase upto 56 weeks of age with significant differences at different ages. The results indicate that the cross may be of use for egg-type poultry in the backyard. However, before large-scale propagation, the cross has to be evaluated in the field. © 2015 Taylor & Francis. Source

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