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Comparison of meat quality of local poultry and Arbors acres reared in two farming systems in Tunisia

A. Elkhazen1

M. Ben larbi*2

N. M’hamdi1

B. Haddad1

 

1 Department of Animal Production and Fishery Sciences, Institut National Agronomique de Tunisie, Tunis, Tunisia.

2 High school of Agriculture of Mateur, Bizerte, Tunisia.

 

Abstract - The aims of this study were to compare meat technological, organoleptic and nutritional qualities of both local chickens and arbors acres reared into two farming systems (industrial and traditional), and to determine the effect of storage temperatures (24°C or 4°C) on meat quality during the pattern of rigor mortis. A total of 110 chicks (n = 50 of local chickens and n = 60 of Arbor Acres) was used. Results showed that meat color parameters (L* and a*) were not affected by breeding systems, but b* parameter was significantly (p<0.001) affected. In fact, the pasture consumed by traditional poultry increases the value of b* compared to the industrial animals eating only commercial food. Moreover, the ultimate pH measured doesn’t have any effect on color (redness and luminosity). Furthermore no significant difference in sheer force parameter was observed, despite of animals do not have the same age at slaughter. For other parameter of texture (Hardness, Cohesiveness and Chewiness), we don’t reported significant difference (p<0.05) between breeding system. The sex and storage temperature have no influence on texture of breast meat.

 

Keywords: meat quality, local Tunisian poultry, rearing system, temperature of storage.

 

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Genetic diversity analysis of different barley (Hordeum vulgare L.) genotypes from arid and humid regions using ISSR and RAPD markers

S. DRINE1*

F. GUASMI1

S. BEN ALI1

T. TRIKI1

F. BOUSSORRA1

A. FERCHICHI2

 

1 Institute of Arid Regions, 4119 Medenine .Tunisia.

2 National Agronomic Institute of Tunisia. 43 av. Charles Nicole, 1082 Tunis, Tunisia.

 

Abstract - The genetic variability analysis of eight barley genotypes, of various origin and pedigree, were achieved using 9 ISSR (Inter-simple sequence repeat) and 9 RAPD (Random amplified polymorphic DNA) primers. ISSR and RAPD markers revealed 72.2% and 61% polymorphic bands, respectively. The relative efficiencies of these marker systems were compared by means of different parameters such as effective multiplex ratio (EMR), marker index (MI) and polymorphic information content (PIC). All the examined parameters found to be higher in ISSR system.

A significant correlation was observed between the Jaccard’s dissimilarity matrices based on ISSR and RAPD markers, as revealed by Mantel test using the Pearson correlation coefficient (r = 0.67;P < 0.05).

Cluster analysis on ISSR and RAPD data clearly discriminated the genotypes in terms of their genetic background and geographical origin and both of clustering provides consistent results of their qualifications.

 

Keywords: Hordeum vulgare L.; Genetic variability analysis; Molecular markers, Discriminating power.

 

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Copyright

This article is published under license to Journal of New Sciences. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

CC BY 4.0