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Morphometric Analysis of Indigenous, Exotic and Crossbred Chickens (gallus Domesticus L.) in Rajshahi, Bangladesh

M Saiful Islam
Department of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh

Ripon Kumar Dutta
Department of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Context: The quantification of morphometric variations has been regarded as peripheral to the mechanistic study of development of a species. This is now changing because the rapidly advancing knowledge of development in post-genomic biology is creating a need for more refined measurements of the morphometric changes produced by genetic perturbations or treatments. Objective: To estimate the age at marketable size and body morphometric parameters of indigenous, exotic and crossbred chicken to use such parameters as discriminate variables and to investigate the relationships among the variables of the chicken breeds under study. Materials and Methods: Six chicken breeds namely an indigenous (non descriptive, Deshi), four exotics as Broiler, Cockerel, Fayoumi and RIR, and a crossbred called Sonali (RIR?× Fayoumi?), were used for the study. Results: Age and nine morphometric parameters viz., gross weight (GW), blood weight (BW), feather weight (FW), skin weight (SW), body weight after skinning (BWS), visceral weight (VW), offal weight (OW), net edible weight (NEW) and edible ratio (ER), were determined from a total of 30 adult chickens (6 breeds 5 replicates each). All the parameters except FW showed significant differences among the breeds (P<0.01). RIR showed the highest values for all parameters except ER, which was the highest in Cockerel (1.77±0.23) and the lowest in RIR (1.47±0.01). Association between GW and NEW was statistically significant in Indigenous (P<0.001), Sonali (P<0.01) and all exotics except Broiler (P<0.001). Conclusion: Present results indicate that Cockerel, Fayoumi, Indigenous and Sonali chickens are advantageous genotypes as they had higher ER values compared to Broiler and RIR breeds.

Keywords: Gallus domesticus, Body morphometric traits, Net edible weight, Edible ratio.

Location: Rajshahi Metropolitan areas

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Chicken

Objectives:

To estimate the age at marketable size and body morphometric parameters of indigenous, exotic and crossbred chicken to use such parameters as discriminate variables and to investigate the relationships among the variables of the chicken breeds under study.

Methodology:

Collection of the chicken breeds: Six adult chicken breeds, one indigenous (non-descriptive, Deshi), four exotics viz. Broiler, Cockerel, Fayoumi and RIR (Rhode Island Red) and one crossbred called Sonali (derived from RIR? × Fayoumi?), were collected at random from six local markets of Rajshahi Metropolitan areas viz. Binodpur, Kazla, Talaimari, Shaheb Bazar, New market and Laxmipur. Morphometric traits: Age (in month) and body morphometric traits (in g) viz. gross weight (GW), blood weight (BW), feather weight (FW), skin weight (SW), body weight after skinning (BWS), visceral weight (VW) that included crop, small and large intestines and pancreas, offal weight (OW) including weights of heart, liver, kidneys, processed head and gizzard, and net edible weight (NEW), were recorded from five replicates for each breed. Edible ratios (ER) were determined using the formula: ER=GW/NEW. Correlations between age vs. GW and BW, and those between GW vs. BW, VW and NEW each were calculated. Statistical analyses: Mean, standard deviation (SD), analysis of variance (ANOVA), least significant differences (LSD) and co-efficient of correlation values (r) were computed using the SPSS (version 11.0 for Windows). Data on age and various body morphometric parameters were subjected to these statistical procedures to detect the significance of the difference between the chicken breeds (Olawunmi et al. 2008).

Source of Information: J. bio-sci. 18: 94-98, 2010 ISSN 1023-8654

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Nine distinguishing morphometric variables shown in the present study can be used to discriminate commercial chicken breeds in our country. Significantly higher ER values in Cockerel, Fayoumi, Indigenous and Sonali compared to those in Broiler and RIR indicate that the former genotypes would be economically and/or nutritionally potential than the later ones, and therefore, can be recommended as better varieties of chicken suitable for rearing and marketing in Rajshahi. For improving these varieties, however, systematic breed evaluation and artificial insemination, accompanied by effective feeding, management and disease control programmes at farm levels should be emphasized.

Knowledge Management: Journal